How to do a Select in a Select - Stack Overflow I have a table containing a unique ID field Another field (REF) contains a reference to another dataset's ID field Now I have to select all datasets where REF points to a dataset that doesn't exi
sql server - SQL select from a select query - Stack Overflow I want to do a select request that perform a first select and then use that selection to perform a second select I made a 1st version using a temp table but I would like to know if there is a way
sql server - INSERT INTO vs SELECT INTO - Stack Overflow The simple difference between select Into and Insert Into is: --> Select Into don't need existing table If you want to copy table A data, you just type Select * INTO [tablename] from A
sql server - Select with (nolock) - Stack Overflow SELECT statements do indeed apply locks unless there is a statement at the top of the query SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED By all means use WITH (NOLOCK) in SELECT statement on tables that have a clustered index, but it would be wiser to only do so if there's a need to
Is it possible to use the SELECT INTO clause with UNION [ALL]? In SQL Server this inserts 100 records, from the Customers table into tmpFerdeen :- SELECT top(100)* INTO tmpFerdeen FROM Customers Is it possible to do a SELECT INTO across a UNION ALL SELECT :-
sql - Case in Select Statement - Stack Overflow Using a SELECT statement with a searched CASE expression Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set based on comparison values