🏅 Sql Server Top 10 Distinct
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
SQL Server Count Distinct records with a specific condition in window ...
· Under normal circumstances (i.e. calculating the number of distinct months), you would just subtract 1. In this case, though, you treat 0 values as NULL. These still get counted, but there is only one of them. So, you either subtract 1 or 2 depending on the presence of 0 values. Voila! The result is the number of distinct months with a flag of 1.
4 days ago
How To Count on Distinct Column Values In SQL Server
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
3 days ago
Top 10 SQL Tools for Efficient Data Analysis - onlinetoolguides.com
· Toad for SQL Server: Advanced Database Management Solution. Toad for SQL Server is a top-notch SQL database management tool. It has many features that make working with data easy. You can roll back transactions, recall SQL scripts, and test scripts across multiple databases. Toad’s team tools are great for working together on projects.
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May 4, 2025
sql server - SQL counting distinct over partition - Database ...
· This is, in a way, an extension to Lennart's solution, but it is so ugly that I dare not suggest it as an edit.The goal here is to get the results without a derived table. There may never be the need for that, and combined with the ugliness of the query the whole endeavour may seem like a wasted effort.
4 days ago
sql server - SQL Preserve the Order in group by - Database ...
· I want distinct records and when I do group by it loses the Order. I want to maintain the order. ... The order of data in you screen image can differ with the same data depending on how SQL server chose to return the rows. ... Group By With Rollup results table has totals at the top. 0. Select distinct values in column with condition. 3.
4 days ago
sql server - How to keep row ordering with DISTINCT command or how to ...
· Even with your first query the output order is in no way guaranteed. Unless a specific ordering is demanded via an ORDER BY clause the database is free to hand you the results in any order it see fit. For simple queries that can use an index it may look like the order is guaranteed because the output will be in the order of which ever index is used as the main seek/scan, but for anything more ...
4 days ago
How to Use COUNT() vs DISTINCT COUNT() in SQL
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
4 days ago
Sql Top 1 Distinct
sql - select top 1 * returns diffrent recordset each time - Stack Overflow
· In my application I use SELECT TOP 12 * clause to select top 12 records from database and show it to user. In another case I have to show the same result one by one. So I use SELECT TOP 1 * clause,...
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
How to Find Nth Highest Salary from a Table? - GeeksforGeeks
· Conclusion Finding the Nth highest salary in a SQL table is essential for many data analysis tasks. By using SQL functions like DENSE_RANK(), LIMIT, MIN(), and COUNT(DISTINCT), we can easily retrieve the Nth highest salary based on your needs.
5 days ago
How to Use COUNT () vs DISTINCT COUNT () in SQL
· Learn the key differences between COUNT () and DISTINCT COUNT () in SQL, and discover how to effectively use these aggregate functions to analyze and summarize your database data with precision.
4 days ago
PostgreSQL: Documentation: 17: SELECT
· The actual output rows are computed using the SELECT output expressions for each selected row or row group. (See SELECT List below.) SELECT DISTINCT eliminates duplicate rows from the result. SELECT DISTINCT ON eliminates rows that match on all the specified expressions. SELECT ALL (the default) will return all candidate rows, including duplicates.
3 days ago
9.2. Comparison Functions and Operators - PostgreSQL
· Thus, expressions like 1 < 2 < 3 are not valid (because there is no < operator to compare a Boolean value with 3). Use the BETWEEN predicates shown below to perform range tests. There are also some comparison predicates, as shown in Table 9.2. These behave much like operators, but have special syntax mandated by the SQL standard.
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3 days ago
1z0-071 Exam - Free Actual Q&As, Page 1 | ExamTopics
· Free, Actual and Latest Practice Test for those who are preparing for Oracle Datbase 12c SQL .
1
3 days ago
PostgreSQL: Documentation: 18: 11.6. Unique Indexes
· Currently, only B-tree indexes can be declared unique. When an index is declared unique, multiple table rows with equal indexed values are not allowed. By default, null values in a unique column are not considered equal, allowing multiple nulls in the column. The NULLS NOT DISTINCT option modifies this and causes the index to treat nulls as equal.
3 days ago
Sql Top 100 Distinct
Why is a 'Select distinct limit 100' using tmp tables?
· There are multiple ways that SELECT DISTINCT col FROM ...LIMIT 100 can be performed:. Case 1: Create a temp table with all rows of col, sort it, then peel off the first 100 (de-dupping as it goes).. Case 2: Build a hash in memory, read col putting it into the hash, stop after 100. (Fast.) Case 3 (if there is INDEX(col)): Leapfrog through the index.This effectively takes 100 BTree dives into ...
Nov 28, 2016
Horizontal DISTINCT COUNT in SQL Server or a COUNT IF without counting ...
· Rotating SQL results is at minimum tricky. If you want to present data right from the query, you may have to sacrifice query flexibility and hardcode a good deal of information (like column names and their count). ... SELECT STORE, COUNT(DISTINCT CASE REFERRED WHEN 'RADIO' THEN CUS_ID END) AS RADIO, SUM (CASE REFERRED WHEN 'RADIO' THEN ...
3 days ago
9.2. Comparison Functions and Operators - PostgreSQL
· Ordinary comparison operators yield null (signifying “ unknown ”), not true or false, when either input is null.For example, 7 = NULL yields null, as does 7 <> NULL.When this behavior is not suitable, use the IS [ NOT] DISTINCT FROM predicates:. a IS DISTINCT FROM b a IS NOT DISTINCT FROM b. For non-null inputs, IS DISTINCT FROM is the same as the <> operator.
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3 days ago
How to Use COUNT() vs DISTINCT COUNT() in SQL
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
4 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 ...
Feb 20, 2025
sql server - SQL counting distinct over partition - Database ...
· This is, in a way, an extension to Lennart's solution, but it is so ugly that I dare not suggest it as an edit.The goal here is to get the results without a derived table. There may never be the need for that, and combined with the ugliness of the query the whole endeavour may seem like a wasted effort.
4 days ago
Top 10 Distinct Sql Server
sql - best way to get count and distinct count of rows in single query ...
· select top 1 COUNT(*) OVER() YourRowcount, DENSE_RANK() OVER(ORDER BY YourColumn) YourDistinctCount FROM Yourtable ORDER BY TT DESC Note: This code is written sql server. Please check the code and let me know.
4 days ago
How To Count on Distinct Column Values In SQL Server
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
3 days ago
Top 10 SQL Tools for Efficient Data Analysis - onlinetoolguides.com
· Toad for SQL Server: Advanced Database Management Solution. Toad for SQL Server is a top-notch SQL database management tool. It has many features that make working with data easy. You can roll back transactions, recall SQL scripts, and test scripts across multiple databases. Toad’s team tools are great for working together on projects.
10
May 4, 2025
sql server - SQL counting distinct over partition - Database ...
· This is, in a way, an extension to Lennart's solution, but it is so ugly that I dare not suggest it as an edit.The goal here is to get the results without a derived table. There may never be the need for that, and combined with the ugliness of the query the whole endeavour may seem like a wasted effort.
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
sql - Gathering distinct patient diagnosis records - Code Review Stack ...
· This code correctly gathers diagnosis records for a patient to show distinct records based on the AMA ICD9 code, diagnosis description, and date of posting. The output is distinct on (ICD code, cdesc, tposted). The most recent date of usage, tposted, is assigned to each unique combination of (ICD9 code, cdesc).
3 days ago
sql server - How to keep row ordering with DISTINCT command or how to ...
· Even with your first query the output order is in no way guaranteed. Unless a specific ordering is demanded via an ORDER BY clause the database is free to hand you the results in any order it see fit. For simple queries that can use an index it may look like the order is guaranteed because the output will be in the order of which ever index is used as the main seek/scan, but for anything more ...
4 days ago
How to Use COUNT() vs DISTINCT COUNT() in SQL
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
4 days ago
Top And Distinct In Sql Query
How to Find Nth Highest Salary from a Table? - GeeksforGeeks
· The above query will fetch the details of the employee with the 4th highest salary. Let us see how query works starting with the most inner query. Query 1: SELECT DISTINCT sal FROM Employee ORDER BY sal DESC LIMIT 4; Output: Query 2: SELECT MIN(sal) FROM Employee WHERE sal IN (SELECT DISTINCT sal FROM Employee ORDER BY sal DESC LIMIT 4); Output: 5.
5 days ago
Usage of Distinct key word, SQL - Stack Overflow
· It would only display all the rows if each row was unique in the database. The DISTINCT keyword says "eliminate exact duplicates" in the output set. In your second query, you're selecting City, then via the *, all of the columns in the table.Say you had columns City, State, Zip, then City, * is the same as City, City, State, Zip.Now, it would only return the unique combinations of these for ...
4 days ago
sql server - How to SELECT TOP(1) with COALESCE to pick the top NOT ...
· @LouisSomers I think that you have chosen a very bad scheme of hierarchy storage. 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. This will greatly simplify the processing.
4 days ago
sql server - How to keep row ordering with DISTINCT command or how to ...
· Even with your first query the output order is in no way guaranteed. Unless a specific ordering is demanded via an ORDER BY clause the database is free to hand you the results in any order it see fit. For simple queries that can use an index it may look like the order is guaranteed because the output will be in the order of which ever index is used as the main seek/scan, but for anything more ...
4 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
PostgreSQL: Documentation: 18: 7.3. Select Lists
· Note that the “ first row ” of a set is unpredictable unless the query is sorted on enough columns to guarantee a unique ordering of the rows arriving at the DISTINCT filter. (DISTINCT ON processing occurs after ORDER BY sorting.) The DISTINCT ON clause is not part of the SQL standard and is sometimes considered bad style because of the ...
3 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 COUNT() vs DISTINCT COUNT() in SQL
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
4 days ago
Sql Server Select Top 10 Distinct
sql server - 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
· SELECT DISTINCT sal FROM Employee ORDER BY sal DESC LIMIT 4); Output: 5. Method 4: Using COUNT(DISTINCT) for Nth Highest Salary. The COUNT(DISTINCT) method compares the count of distinct salaries greater than each employee’s salary to find the Nth highest salary. Query to Find the Nth Highest Salary: SELECT ename, sal FROM Employee e1. WHERE ...
5 days ago
sql server - SQL counting distinct over partition - Database ...
· SELECT * FROM #MyTable AS mt CROSS APPLY ( SELECT COUNT(DISTINCT mt2.Col_B) AS dc FROM #MyTable AS mt2 WHERE mt2.Col_A = mt.Col_A -- GROUP BY mt2.Col_A ) AS ca; ... DISTINCT clause for aggregate functions on the feedback site if you would like that feature added to SQL Server. Share. Improve this answer. Follow edited Jun 17, 2019 at 6:11. Paul ...
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
sql server - How to keep row ordering with DISTINCT command or how to ...
· Even with your first query the output order is in no way guaranteed. Unless a specific ordering is demanded via an ORDER BY clause the database is free to hand you the results in any order it see fit. For simple queries that can use an index it may look like the order is guaranteed because the output will be in the order of which ever index is used as the main seek/scan, but for anything more ...
4 days ago
How To Count on Distinct Column Values In SQL Server
· To count the number of unique values in a column, SQL Server provides the COUNT(DISTINCT column_name) function. Here’s a simple example: SELECT COUNT(DISTINCT column_name) AS distinct_count FROM table_name; This query will return the number of unique values in column_name. Counting Distinct Values Across Multiple Columns
3 days ago
Identifying Top Entities by ASH (Part 1/5): Top SQL Statements - LinkedIn
· The following query retrieves the top 10 SQL statements executed in the last 30 minutes, including their execution count and percentage of total activity: Sample output:
4 days ago
Top 7 Dynamic Management View (DMV) Queries in SQL Server - Red9
· To effectively monitor and optimize your SQL Server Analysis Services (SSAS) instance, it’s essential to use the right tools and understand the permissions required to query DMVs. Available Tools for Running DMV Queries: SQL Server Management Studio (SSMS) – Ideal for ad-hoc DMV queries, troubleshooting, and live performance checks.
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May 4, 2025