🏅 Sql Top 10 By Group

SQL Group BY, Top N Items for each Group - Stack Overflow

· SELECT TOP 5 S.UPCCode, SUM(TotalDollarSales) FROM Sales S WHERE S.StoreId = 1 GROUP BY S.UPCCode ORDER BY SUM(S.TotalDollarSales) desc The Sales table has -> UPCCode, SaleDate, StoreId, TotalDollarSales. I am looking for a query which will return me Top 5 items sold for each of the stores in a single query.

4 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

· thanks, that works, I'll have to chew on it for a while though... it looks like you are iterating from top down and the coalesce() will stick to the first not-null item it finds... but I'm having difficulty wrapping my head around the recursive UNION ALL (never thought SQL server could handle self referencing stuff), and the string concatenation of hierarchy is also tricky...

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

· Finding the Nth highest salary in a database table is a common challenge and interview question for SQL enthusiasts and professionals. This tutorial will guide you step-by-step through multiple methods of solving this problem in SQL, from using ranking functions to subqueries and the LIMIT clause.. In a relational database, retrieving the Nth highest salary is essential for analytical tasks ...

5 days ago

query - Strange behavior of TOP 1 clause sql server - Database ...

· Mike D. has provided an answer on how SQL Server sorts data that might help you understand what is it about the deterministic result you see on some comments.. The Arguments of the ORDER BY doc says:. ASC | DESC Specifies that the values in the specified column should be sorted in ascending or descending order. ASC sorts from the lowest value to highest value.

3 days ago

Oracle Sql Limit Clause Best Practices - Restackio

· Top-N Queries: The LIMIT clause is frequently used in conjunction with the ORDER BY statement to retrieve the top N records from a dataset. For instance, if you want to find the top 10 customers based on sales, you can easily achieve this by combining LIMIT with an appropriate ORDER BY clause.

6 days ago

SQL Intermediate Practice Questions - LearnSQL.com

· The product table contains: product_id, name, category, price, and launch_date. The purchase table records transactions and includes: purchase_id, customer_id, product_id, quantity, total_amount, and purchase_date.; Exercise 1: Monthly Revenue Summary. Exercise: Break down the purchase data by year and month, and show the number of orders (orders) and total revenue (revenue) for each period.

5 days ago

FROM clause plus JOIN, APPLY, PIVOT (T-SQL) - SQL Server

· Applies to: SQL Server 2016 (13.x) and later versions Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric In Transact-SQL, the FROM clause is available on the following statements: DELETE; UPDATE; SELECT; The FROM clause is usually required ...

Mar 7, 2025

14 Google SQL Interview Questions (Updated 2025) - DataLemur

· Answer: You can implement the SQL Window function to solve this:. This query first join the . and tables, and then partition the results by and the month of the .The clause counts the number of searches in each partition. The WHERE filter ensure the data used is from the year 2024. Finally, we order the results by . in descending order to get the categories with the most searches by month at ...

3 days ago

Mysql Top 10 Rows

sql - Get top N rows of each group in MySQL - Stack Overflow

· If you want n rows per group, use row_number(). If you then want them interleaved, use order by: select t.* from (select t.*, row_number() over (partition by type order by name) as seqnum from t ) t where seqnum <= 2 order by seqnum, type; This assumes that "top" is alphabetically by name.

3 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

· It allows you to skip the first N-1 rows and then return the next row, which represents the Nth highest salary. Query to Find the 6th Highest Salary: SELECT * FROM (SELECT * FROM Employee ORDER BY sal DESC LIMIT 6) AS T ORDER BY T.sal ASC LIMIT 1; Explanation: The inner query selects the top 6 salaries from the Employee table ordered in ...

5 days ago

mysql - How to get latest 2 records of each group - Database ...

· select t.* from ( select distinct color from tbl ) as td -- for every colour left join -- join to the table tbl as t -- and get all rows on t.color = td.color -- with that color and t.sn >= coalesce( -- and sn bigger or equal than ( select ti.sn -- the 2nd higher sn value from tbl as ti where ti.color = td.color order by ti.sn desc limit 1 offset 1 -- 1 + 1st = 2nd ), -9223372036854775808 ...

5 days ago

SQL MIN() and MAX() Functions - Intellipaat

· Using GROUP BY with MIN() and MAX() Functions in SQL. In MySQL, you can use the GROUP BY clause and aggregation functions to aggregate a group of rows with the same value in a particular column. With the GROUP BY clause, we can determine totals and averages for each group of rows with aggregate functions. Syntax:

4 days ago

MySQL Query Optimization Strategies To Improve Performance

· Indexes help MySQL locate data fast, speeding up queries. MySQL offers several index types: Primary Index: Uniquely identifies each row, great for direct lookups. Unique Index: Ensures column values are unique, ideal for maintaining data consistency. Full-text Index: Best for searching large text fields, like articles or posts. Choose indexes based on your query needs.

6 days ago

PostgreSQL: Documentation: 17: SELECT

· WITH Clause. The WITH clause allows you to specify one or more subqueries that can be referenced by name in the primary query. The subqueries effectively act as temporary tables or views for the duration of the primary query. Each subquery can be a SELECT, TABLE, VALUES, INSERT, UPDATE, DELETE, or MERGE statement. When writing a data-modifying statement (INSERT, UPDATE, DELETE, or MERGE) in ...

3 days ago

How to Use MySQL EXPLAIN for Query Performance Tuning

· Interpreting the EXPLAIN Output. The output includes columns such as: id: Identifier assigned to each part of the query; select_type: Type of query (simple, subquery, etc.); table: Name of the table used; type: Method of accessing the table (ALL, index, range, etc.); possible_keys: Indexes available for the query; key: Index actually used; rows: Estimated number of rows to be scanned

4 days ago

100 MySQL Interview Questions and Answers (2024) - Turing

· SQL_CALC_FOUND_ROWS is an option in a SELECT statement that calculates the total number of rows that would have been returned had there been no LIMIT constraint. FOUND_ROWS() is the function used to fetch the value calculated by SQL_CALC_FOUND_ROWS. ... Turing helps companies match with top-quality remote MySQL developers from across the world ...

100

4 days ago

Sql Group By Top 1

SQL Group BY, Top N Items for each Group - Stack Overflow

4 days ago

sql server - How to SELECT TOP (1) with COALESCE to pick the top NOT ...

· It is convenient for displaying, but completely inconvenient for SQL processing. If possible, I would recommend going to the standard parent-child storage scheme, and building FQPath in the query if required.

4 days ago

SQL Intermediate Practice Questions - LearnSQL.com

· Practice your SQL skills with 10 intermediate-level questions based on real-world scenarios. Includes solutions using GROUP BY, CASE WHEN, subqueries, CTEs, and more.

5 days ago

PostgreSQL: Documentation: 17: 9.21. Aggregate Functions

· Aggregate functions compute a single result from a set of input values. The built-in general-purpose aggregate functions are listed in Table 9.60 while statistical aggregates are in Table 9.61. The built-in within-group ordered-set aggregate functions are listed in Table 9.62 while the built-in within-group hypothetical-set ones are in Table 9.63. Grouping operations, which are closely related ...

3 days ago

Explain about grouping in DBMS - Filo

· Concepts Grouping, Aggregate Functions, SQL, GROUP BY Clause, Data Aggregation Explanation In Database Management Systems (DBMS), grouping is a technique used to organize data into subsets based on one or more columns. This is particularly useful when you want to perform aggregate calculations on these subsets.

6 days ago

PostgreSQL: Documentation: 17: SELECT

· SELECT SELECT, TABLE, WITH — retrieve rows from a table or view Synopsis [ WITH [ RECURSIVE ] with_query [, …

3 days ago

PostgreSQL: Documentation: 17: Chapter 7. Queries

· The previous chapters explained how to create tables, how to fill them with data, and how to manipulate that data. Now we finally discuss how to retrieve the data from the database.

3 days ago

Using Aliases In Sql Server Group By - Restackio

· Using aliases in GROUP BY queries is a best practice that enhances the clarity and efficiency of your SQL code. By adopting this approach, you can create more readable and maintainable queries, ultimately leading to better data analysis and reporting outcomes.

May 4, 2025

Oracle Top 10 Query

Selecting top results from SQL Count query, including table join - Oracle

· Using the 'rownum' to get the top result doesn't give the expected result, because it get the 10 first rows which are not ordred, and then order them (Please notify this on a comment on Andrew's response, I don't have the right to add the comment) .

4 days ago

Oracle Sql Limit Clause Best Practices - Restackio

6 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

· Query to Find the 6th Highest Salary: SELECT * FROM (SELECT * FROM Employee ORDER BY sal DESC LIMIT 6) AS T ORDER BY T.sal ASC LIMIT 1; Explanation: The inner query selects the top 6 salaries from the Employee table ordered in descending order. The outer query orders the results in ascending order to retrieve the 6th highest salary, skipping ...

5 days ago

10 Oracle SQL Interview Questions (Updated 2025) - DataLemur

· Answer: This SQL statement gets the conversion rate for each product_id. The conversion rate is calculated by dividing the number of times the product was added to the cart (from ) by the number of clicks on the product's ad (from ).The left join on and is to ensure that we count only the instances where the user who clicked the ad is the one who added the item to the cart.

3 days ago

Repeat row in the result based on the value of a column

· If you are using Oracle 12c or higher, you can CROSS APPLY with a CONNECT BY LEVEL query generating the numbers from 1 to VAL_COL. Something like this (I don't have an instance ready and SQLFiddle uses 11g, which doesn't support this): ... Help with query: Get MAX value of rows that previous row has certain value. 1. SQL queries to get the ...

4 days ago

OraFAQ Forum: Forms » how to execute the last query fired on form when ...

· i am writing a code on form "CANCEL" button which mean to cancel the current user action .now if the last action was execute_query so when user click the cancel button so my logic should capture the last query fired on form through ":SYSTEM.LAST_QUERY" and then execute the last query through

3 days ago

25 Best SQL Query Tools Reviewed In 2025 - The CTO Club

· The visual query builder assists in creating complex queries without extensive SQL knowledge. SQL formatting helps keep your code clean and readable, which is essential for team collaboration. Integrations include Amazon RDS, Oracle, MySQL, PostgreSQL, SQL Server, SQLite, MariaDB, DB2, H2, and Vertica.

5 days ago

Sql Top 3 Per Group

SQL Group BY, Top N Items for each Group - Stack Overflow

4 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

· The result I'm after is for each column, the first not-null value (and it would be great if I can also squash a NULLIF(COLOR, '') in as well). ... I'm working with MS SQL Server (and need to support version 2005). sql-server; coalesce; Share. ... SELECT TOP 1 DATEDIFF for each hour group. 3.

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

5 days ago

PostgreSQL: Documentation: 17: Chapter 7. Queries

· The SQL Language: Home Next: Chapter 7. Queries. Table of Contents. 7.1. Overview 7.2. Table Expressions 7.2.1. The FROM Clause 7.2.2. The WHERE Clause 7.2.3. The GROUP BY and HAVING Clauses 7.2.4. GROUPING SETS, CUBE, and ROLLUP 7.2.5. Window Function Processing 7.3. Select Lists 7.3.1. Select-List Items 7.3.2. Column Labels ... 7.8.3. Common ...

3 days ago

PostgreSQL: Documentation: 17: 9.21. Aggregate Functions

· Each of the “ hypothetical-set ” aggregates listed in Table 9.63 is associated with a window function of the same name defined in Section 9.22. In each case, the aggregate's result is the value that the associated window function would have returned for the “ hypothetical ” row constructed from args , if such a row had been added to the sorted group of rows represented by the sorted_args .

3 days ago

100+ SQL Interview Questions and Answers - Intellipaat

· 80. Given data where store inventory is stored, your task is to find the top 3 products in each category in terms of prices. To find the top 3 products in each category in terms of price, we can group by clause along with the aggregate function (MAX) with the price column and set the limit as 3 in descending order.

100

5 days ago

SQL Intermediate Practice Questions - LearnSQL.com

5 days ago

sql server - SELECT top 5 SUMs (one per customer) for each month in ...

· The next subquery written in traditional form adds a RANK column within each month by the subtotal, which is finally SELECTed to give the top 5*. Note that RANK allows for equal rankings, which may end up showing 6 customers for a month, if 3 of them are ranked equally at position 4.

4 days ago

Mssql Group By Top 1

SQL Group BY, Top N Items for each Group - Stack Overflow

4 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

5 days ago

MAX CASE WHEN in SQL – Explained with Examples (2025 Guide)

· Case 1: Finding the maximum value under a threshold. We can use MAX(CASE WHEN) to find the maximum value in a table under a threshold. Supposing you want to find the most expensive priced item below 60, given the previous table, we can do the following query: Select inflated_price, MAX (Case when inflated_price < 60 then inflated_price end ...

4 days ago

FROM clause plus JOIN, APPLY, PIVOT (T-SQL) - SQL Server

3 days ago

Using Aliases In Sql Server Group By | Restackio

· For instance, GROUP BY 1, 2 is preferred over GROUP BY region, product when the first two columns in the SELECT statement are region and product. Aggregate Early. Perform aggregations as early as possible in your query. This means applying GROUP BY before joining with other tables to minimize the dataset size and improve performance. For example:

May 4, 2025

sql server TOP command with order by clause - Stack Overflow

· SQL does not guarantee an order unless you specify an ORDER BY clause, so in the second example you get the first-inserted row by good fortune.. If you specify an ORDER BY clause, the order is not defined if the values to sort on are identical. SQL could have selected any one of the four. This is not a bug, but defined behaviour in SQL.

4 days ago

t sql - Is there a maximum number of rows you can specify for TOP on ...

· Aside: The OP's linked page shows how to get the TOP 1 row without an explicit ORDER BY in a CTE by using an ordered ROW_NUMBER() and then selecting WHERE RowNum = 1. Using ORDER BY within a CTE does not guarantee the the query will return results in order, only applying ORDER BY to the outermost query is guaranteed to do that. –

6 days ago

Sqlite Select Top 10

sql - Parameterizing 'limit' and 'order' in sqlite3 - Stack Overflow

· SQLite (and any other database) allows you to parameterize expressions, that is, any numbers, strings, blobs, or NULL values that appear in a statement.This includes the values in the LIMIT/OFFSET clauses.. Anything else cannot be parameterized. This would be table and column names, operators, or any other keyword (like SELECT, ORDER BY, or ASC).

4 days ago

sqlite - nesting MAX for SELECT - Database Administrators Stack Exchange

· It can be done with a query: SELECT s.* FROM ( SELECT DISTINCT series_id FROM series ) AS ds JOIN series AS s ON s.series_id = ds.series_id AND s.season = ( SELECT si.season FROM series AS si WHERE si.series_id = ds.series_id ORDER BY si.season DESC LIMIT 1 ) AND s.episode = ( SELECT si.episode FROM series AS si WHERE si.series_id = ds.series_id ORDER BY si.season DESC, si.episode DESC LIMIT 1 ) ;

3 days ago

SQLite: select.c

· File src/select.c from the latest check-in from the latest check-in

5 days ago

SQL Language Expressions - SQLite

· the ON or USING clause of a join in a SELECT statement, the HAVING clause of a SELECT statement, the WHEN clause of an SQL trigger, and the WHEN clause or clauses of some CASE expressions. To convert the results of an SQL expression to a boolean value, SQLite first casts the result to a NUMERIC value in the same way as a CAST expression. A ...

Jun 2, 2024

SQLite: Documentation

· apt install gcc make tcl-dev ;# Make sure you have all the necessary build tools tar xzf sqlite.tar.gz ;# Unpack the source tree into "sqlite" mkdir bld ;# Build will occur in a sibling directory cd bld ;# Change to the build directory ../sqlite/configure ;# Run the configure script make sqlite3 ;# Builds the "sqlite3" command-line tool make sqlite3.c ;# Build the "amalgamation" source file ...

5 days ago

sql - Querying a CSV file - Super User

· The "Select Directory" button will be enabled. Click the "Select Directory" button and nagivate to the folder in which you placed your .csv file in the first step. Click on the "Options>>" button. Click on the "Define Format..." button. In the left "Tables" list, select your .csv file and click on the "Guess" button.

4 days ago

SQLite: Help

· This page was generated in about 0.005s by Fossil 2.27 [02d0432ed4] 2025-05-06 18:12:41

5 days ago

Mysql Group By Top 10

sql - Get top N rows of each group in MySQL - Stack Overflow

3 days ago

mysql - How to get latest 2 records of each group - Database ...

· With MySQL 8 SELECT sn, color, value FROM ( SELECT sn, color, value, DENSE_RANK() OVER (PARTITION BY color ORDER BY sn) AS r FROM table ) AS t WHERE t.r <= 2; Using MySQL < 8. You need to use their special variables.. something like this

5 days ago

MAX CASE WHEN in SQL – Explained with Examples (2025 Guide)

· As a data analyst or data scientist, you’ll often be asked to perform conditional aggregation — such as finding the top-performing employee by team, the most recent customer action by region, or the highest value under certain criteria. In SQL, the MAX(CASE WHEN) pattern is your best friend here.

4 days ago

SQL Group By and min (MySQL) - Stack Overflow

· You can try to do a nested lookup between the minimum grouping and the original table. This seems to do the trick. SELECT MinPlaces.Code, MinPlaces.Distance, Places.Location FROM Places INNER JOIN ( SELECT Code, MIN(Distance) AS Distance FROM Places GROUP BY Code HAVING MIN(Distance) > 0 ) AS MinPlaces ON Places.Code = MinPlaces.Code AND Places.Distance = MinPlaces.Distance ORDER BY MinPlaces ...

4 days ago

MySQL (or PHP?) group results by field data - Stack Overflow

· ID meta_key meta_value name 1 group 1 John 2 group 1 Andrea 3 group 1 Jack 4 group 2 Mike 5 group 2 Kurt 6 group 3 Alice and I need to sort / display the same as the example above, something like this:

4 days ago

MySQL :: MySQL Workbench Manual

· This is the MySQL Workbench Reference Manual. It documents the MySQL Workbench Community and MySQL Workbench Commercial releases for versions 8.0 through 8.0.42. MySQL Workbench is developed and tested with MySQL Server 8.0. MySQL Workbench may connect to MySQL Server 8.4 and higher but some MySQL Workbench features may not function with those ...

6 days ago

India accuses Pakistan of breaking ceasefire deal - Sky News

· India has accused Pakistan of violating a ceasefire agreement, hours after the truce was reached. India's foreign secretary Vikram Misri said his country's armed forces have been "given ...

1 day ago

数据库分组统计GROUP和分组筛选HAVING - 木灵鱼儿

· 前言. 在日常的数据分析和报表开发中，分组统计是非常常见的需求。mysql 提供了 group by 语句用于分组统计，而 having 子句则用于分组后的筛选。本文将详细讲解如何在 mysql 中使用分组、分组的适用场景、实际案例与代码示例，并介绍分组查询如何显示其他字段以及分组后再进行筛选的方法。

3 days ago

Oracle Sql Top 10 Rows

sql - How to select top five or 'N' rows in Oracle 11g - Stack Overflow

· select distinct ani_digit, ani_business_line from cta_tq_matrix_exp limit 5 I want to select top five rows from my resultset. if I used above query, getting syntax error.

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

5 days ago

Oracle Sql Limit Clause Best Practices - Restackio

· Explore best practices for using the LIMIT clause in Oracle SQL to optimize data retrieval in startup data engineering.

6 days ago

duplication - How can I display twice each stored row without using ...

· The relevant table, named emp, holds the following data: CREATE TEMPORARY TABLE emp AS SELECT * FROM ( VALUES (1,'A'), (2,'B'), (3,'C') ); ID Name -- ---- 1 A 2 B 3 C ...

4 days ago

Oracle Sql Select Only Rows With Max Value In A Column Templates

· Here are three examples that use sql to find and select the row with the maximum value in a given column. the examples work in most major rdbms s, including mysql, mariadb, postgresql, sqlite, oracle, and sql server.

4 days ago

[Oracle]오라클 Rank 함수

· 오늘은 오라클에서 자주 쓰이는 순위 함수들에 대해서정리를 해보려고 합니다.Oracle에서는 쓰는 순위 함수는 여러가지가 있습니다.그 중 대표적으로 많이 사용되는 것은 3가지가 있습니다.ROW_NUMBER, RANK, DENSE_RANK 이렇게 3개를 대표적으로 사용하고 있습니다. 오늘은 이 3가지 함수들에 대해서사용방법 ...

4 days ago

Is there a way to find TOP X records with grouped data?

· I'm working with a Sybase 12.5 server and I have a table defined as such: CREATE TABLE SomeTable ( [GroupID] [int] NOT NULL, [DateStamp] [datetime] NOT NULL, [SomeName] varchar (100),

4 days ago

Oracle Pl Sql Loop Through Table Rows - Restackio

· By utilizing PL/SQL loops effectively, you can streamline data retrieval and processing tasks, making your applications more efficient and responsive. For more detailed information, refer to the official Oracle documentation on PL/SQL programming.

May 4, 2025

Select Top 1 By Group Sql

sql - Select top 1 row with aggregate function - Stack Overflow

· ;WITH cte AS ( SELECT *, ROW_NUMBER() OVER (PARTITION BY ID ORDER BY TeamName Asc) AS rn FROM UserData ) SELECT * into #tempTable1 FROM cte WHERE rn = 1 and this: insert into #tempTable2 (ID, Name, NumberOfRelations) select ID, Name, count(*) as NumberOfRelations from UserData group by ID, Name ...and then selecting data from two temp tables.

4 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

4 days ago

7.8. WITH Queries (Common Table Expressions) - PostgreSQL

· The basic value of SELECT in WITH is to break down complicated queries into simpler parts. An example is: WITH regional_sales AS ( SELECT region, SUM(amount) AS total_sales FROM orders GROUP BY region ), top_regions AS ( SELECT region FROM regional_sales WHERE total_sales > (SELECT SUM(total_sales)/10 FROM regional_sales) ) SELECT region, product, SUM(quantity) AS product_units, SUM(amount) AS ...

3 days ago

Is there a way to find TOP X records with grouped data?

· According to the online manual, Sybase 12.5 supports WINDOW functions and ROW_NUMBER(), though their syntax differs from standard SQL slightly.. Try something like this: SELECT SP.* FROM ( SELECT *, ROW_NUMBER() OVER (windowA ORDER BY [DateStamp] DESC) AS RowNum FROM SomeTable WINDOW windowA AS (PARTITION BY [GroupID]) ) AS SP WHERE SP.RowNum <= 3 ORDER BY RowNum DESC;

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

· Typically, we might need to find the highest, second-highest, third-highest, or Nth highest salary to compare top earners or perform queries related to salary rankings. 1. Creating the Employee Table. We start by creating a sample Employee table that will hold the employee names and their salaries. Query: CREATE TABLE emp (emp_name VARCHAR(50),

5 days ago

PostgreSQL: Documentation: 17: SELECT

Feb 20, 2025

PostgreSQL: Documentation: 17: 9.21. Aggregate Functions

· The built-in within-group ordered-set aggregate functions are listed in Table 9.62 while the built-in within-group hypothetical-set ones are in Table 9.63. Grouping operations, which are closely related to aggregate functions, are listed in Table 9.64. The special syntax considerations for aggregate functions are explained in Section 4.2.7.

3 days ago

sql - Select all columns with GROUP BY one column - Stack Overflow

· select t1.* from sch.mytable t1 join ( SELECT min(id) as id FROM sch.mytable GROUP BY key ) t2 on t1.id = t2.id where min(id) is the function that influences which result you get. If you use max(id) you get the other.

3 days ago

Sql Server Group By Top 1

sql - Select top 1 row with aggregate function - Stack Overflow

· SQL tables represent unordered sets. There is no first team name, unless a column specifies the ordering. You don't seem to have such a column. If you had such a column: WITH cte AS ( SELECT ud.*, ROW_NUMBER() OVER (PARTITION BY ID ORDER BY ??) as seqnum, COUNT(*) OVER (PARTITION BY ID) as cnt FROM UserData ud ) SELECT cte.*

4 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

4 days ago

FROM clause plus JOIN, APPLY, PIVOT (T-SQL) - SQL Server

· SQL Server returns errors when duplicate names appear in the FROM clause. table_or_view_name. The name of a table or view. If the table or view exists in another database on the same instance of SQL Server, use a fully qualified name in the form database.schema.object_name.

3 days ago

sql server TOP command with order by clause - Stack Overflow

4 days ago

Mastering SQL | Episode 7: Sorting & Filtering Data ORDER BY, TOP

· 🚀 SQL Tutorial for Beginners | Learn SQL from Scratch! 📊Are you ready to master SQL? This beginner-friendly SQL tutorial will take you step by step through...

6 days ago

Using Aliases In Sql Server Group By | Restackio

May 4, 2025

SQL Server Filtered Indexes: How and When to Use Them

· Instead of scanning the entire table like the above traditional index, SQL Server can use this smaller, focused index to find the matching rows, thereby speeding up query execution. Lower storage requirements . SQL Server filtered indexes are space-efficient because they only keep index entries for the rows that match the specified predicate.

2 days ago

sql - Select all columns with GROUP BY one column - Stack Overflow

· How to add a column with a default value to an existing table in SQL Server? 1808. ... Get top 1 row of each group. Hot Network Questions Multiple selection with fzf and vim having new lines in path/file names Why covariance instead of correlation in the definition of degrees of freedom (effective number of parameters) ...

3 days ago

Sql Select Top 10 By Group

SQL Group BY, Top N Items for each Group - Stack Overflow

· I have a SQL Query which gets gets top 5 sold items at a given store. SELECT TOP 5 S.UPCCode, SUM(TotalDollarSales) FROM Sales S WHERE S.StoreId = 1 GROUP BY S.UPCCode ORDER BY SUM(S.TotalDollarSales) desc The Sales table has -> UPCCode, SaleDate, StoreId, TotalDollarSales. I am looking for a query which will return me Top 5 items sold for each ...

Mar 5, 2013

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

5 days ago

sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...

4 days ago

PostgreSQL: Documentation: 17: SELECT

Feb 20, 2025

SQL Intermediate Practice Questions - LearnSQL.com

5 days ago

5 ideas for new SQL features! - FLEX YOUR DATA

· 1. Optional GROUP BY clause. In most GROUP BY queries, every non-aggregate must be listed in the GROUP BY clause. Sure, we have options, like GROUP BY 1, 2, 3 or GROUP BY ALL, but while these are convenient, they’re also busywork for most queries.

2 days ago

PostgreSQL: Documentation: 18: 7.3. Select Lists

· As shown in the previous section, the table expression in the SELECT command constructs an intermediate virtual table by possibly combining tables, views, eliminating rows, grouping, etc. This table is finally passed on to processing by the select list. The select list determines which columns of the intermediate table are actually output.

3 days ago

sql - Select top 1 row with aggregate function - Stack Overflow

4 days ago

Sql Group By And Select Top 1

SQL Group BY, Top N Items for each Group - Stack Overflow

4 days ago

sql server - How to SELECT TOP (1) with COALESCE to pick the top NOT ...

4 days ago

SQL Intermediate Practice Questions - LearnSQL.com

· Practice your SQL skills with 10 intermediate-level questions based on real-world scenarios. Includes solutions using GROUP BY, CASE WHEN, subqueries, CTEs, and more.

5 days ago

Explain about grouping in DBMS - Filo

6 days ago

7.8. WITH Queries (Common Table Expressions) - PostgreSQL

Feb 20, 2025

PostgreSQL: Documentation: 17: SELECT

· SELECT SELECT, TABLE, WITH — retrieve rows from a table or view Synopsis [ WITH [ RECURSIVE ] with_query [, …

3 days ago

PostgreSQL: Documentation: 15: 7.2. Table Expressions

· The optional WHERE, GROUP BY, and HAVING clauses in the table expression specify a pipeline of successive transformations performed on the table derived in the FROM clause. All these transformations produce a virtual table that provides the rows that are passed to the select list to compute the output rows of the query.

3 days ago

sql - Get top N rows of each group in MySQL - Stack Overflow

3 days ago

Sql Get Top 10 From Each Group

SQL Group BY, Top N Items for each Group - Stack Overflow

4 days ago

How to Find Nth Highest Salary from a Table? - GeeksforGeeks

5 days ago

sql server - How to SELECT TOP (1) with COALESCE to pick the top NOT ...

· Currently I'm doing a separate query for each column but I'm hoping that this can be achieved in a more elegant way? I'm working with MS SQL Server (and need to support version 2005).

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· In each case, the aggregate's result is the value that the associated window function would have returned for the “hypothetical” row constructed from args, if such a row had been added to the sorted group of rows represented by the sorted_args.

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PostgreSQL: Documentation: 17: SELECT

· HAVING is different from WHERE: WHERE filters individual rows before the application of GROUP BY, while HAVING filters group rows created by GROUP BY. Each column referenced in condition must unambiguously reference a grouping column, unless the reference appears within an aggregate function or the ungrouped column is functionally dependent on ...

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· In SQL Server (using TOP) SELECT TOP 5 emp_id, emp_name, salary FROM Employees ORDER BY salary DESC; • TOP 5: Limits output to 5 rows. ... • ROW_NUMBER() assigns a unique number to each row within that group. • Only the first row is kept (rn = 1); duplicates (rn > 1) are deleted.

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· SELECT tbl1.*, tbl2.a FROM ... See Section 8.16.5 for more about the table_name.* notation. If an arbitrary value expression is used in the select list, it conceptually adds a new virtual column to the returned table. The value expression is evaluated once for each result row, with the row's values substituted for any column references.

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