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  1. sql - NOT IN vs NOT EXISTS - Stack Overflow

    Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind..[Order Details] od WHERE p.

  2. How do I perform an IF...THEN in an SQL SELECT?

    15 MFómh 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server.

  3. SQL JOIN: what is the difference between WHERE clause and ON clause?

    SQL INNER JOIN The SQL JOIN clause allows you to associate rows that belong to different tables. For instance, a CROSS JOIN will create a Cartesian Product containing all possible combinations of rows …

  4. sql - What is the difference between JOIN and INNER JOIN ... - Stack ...

    SELECT * FROM table INNER JOIN otherTable ON table.ID = otherTable.FK Is there any difference between the statements in performance or otherwise? Does it differ between different SQL …

  5. sql - Concatenate text from multiple rows into a single text string ...

    Consider a database table holding names, with three rows: Peter Paul Mary Is there an easy way to turn this into a single string of Peter, Paul, Mary?

  6. SQL: IF clause within WHERE clause - Stack Overflow

    18 MFómh 2008 · Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE OrderNumber LIKE '%' + @

  7. Login to Microsoft SQL Server Error: 18456 - Stack Overflow

    8 Iúil 2016 · I am getting this error while trying to connect to the SQL Server. Microsoft SQL Server Error: 18456 Can anybody tell me what the error code means?

  8. sql - Copy data into another table - Stack Overflow

    How to copy/append data from one table into another table with same schema in SQL Server? Edit: let's say there is a query select * into table1 from table2 where 1=1 which creates table1 wi...

  9. SQL Server® 2016, 2017, 2019 and 2022 Express full download

    25 Ean 2017 · All previous version of SQL Server Express were available in both web and full downloads. But I cannot find full download of SQL Server® 2016 Express. Does it exist? Asked the same question …

  10. sql server - SQL MAX of multiple columns? - Stack Overflow

    8 Márta 2012 · How do you return 1 value per row of the max of several columns: TableName [Number, Date1, Date2, Date3, Cost] I need to return something like this: [Number, Most_Recent_Date, Cost] …