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] …
What does <> (angle brackets) mean in MS-SQL Server?
2013年11月8日 · In My Query one place some other developer using <> (angle brackets) What does it mean ?
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 …
SQL: IF clause within WHERE clause - Stack Overflow
2008年9月18日 · Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE …
How do I perform an IF...THEN in an SQL SELECT?
2008年9月15日 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server.
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 - 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 …
sql server - SQL MAX of multiple columns? - Stack Overflow
2012年3月8日 · 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, …
SQL to find the number of distinct values in a column
SQL to find the number of distinct values in a column Asked 17 years, 2 months ago Modified 2 years, 7 months ago Viewed 826k times
Inserting multiple rows in a single SQL query? - Stack Overflow
2009年1月17日 · In SQL Server 2008 you can insert multiple rows using a single INSERT statement.