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
Should I use != or lt; gt; 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 example of when to choose the standard form, T-SQL supports two “not equal to” operators: <> and != The former is standard and the latter is not
SQL: IF clause within WHERE clause - Stack Overflow 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 '%' + @
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