sql - How to do a Select in a Select - Stack Overflow SELECT * FROM YourTable y WHERE NOT EXISTS (SELECT * FROM OtherTable o WHERE y Ref = o Ref) SELECT * FROM YourTable WHERE Ref NOT IN (SELECT Ref FROM OtherTable WHERE Ref IS NOT NULL) SELECT y * FROM YourTable y LEFT OUTER JOIN OtherTable o ON y Ref = o Ref WHERE o Ref IS NULL
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 to do it without the temporary table my code with the temp table is like :
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 The following example displays the list price as a text comment based on the price range for a product
What does it mean `SELECT 1 FROM table`? - Stack Overflow SELECT * FROM TABLE1 T1 WHERE EXISTS ( SELECT 1 FROM TABLE2 T2 WHERE T1 ID= T2 ID ); Basically, the above will return everything from table 1 which has a corresponding ID from table 2 (This is a contrived example, obviously, but I believe it conveys the idea
database - How to select unique records by SQL - Stack Overflow When I perform SELECT * FROM table I got results like below: 1 item1 data1 2 item1 data2 3 item2 data3 4 item3 data4 As you can see, there are dup records from column2 (item1 are dupped) So how co