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 …
Should I use != or <> for not equal in T-SQL? - Stack Overflow
Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e.g. in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL Server", they say "As an …
SQL WITH clause example - Stack Overflow
23 sept. 2012 · 353 The SQL WITH clause was introduced by Oracle in the Oracle 9i release 2 database. The SQL WITH clause allows you to give a sub-query block a name (a process also …
How do I perform an IF...THEN in an SQL SELECT?
15 sept. 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server.
SQL: IF clause within WHERE clause - Stack Overflow
18 sept. 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 …
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?
sql - Delete duplicate rows keeping the first row - Stack Overflow
10 To delete the duplicate rows from the table in SQL Server, you follow these steps: Find duplicate rows using GROUP BY clause or ROW_NUMBER () function. Use DELETE statement to …
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...
Get the last day of the month in SQL - Stack Overflow
From SQL Server 2012 you can use the EOMONTH function. Returns the last day of the month that contains the specified date, with an optional offset. Syntax
How to see query history in SQL Server Management Studio
Is the query history stored in some log files? If yes, can you tell me how to find their location? If not, can you give me any advice on how to see it?
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