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How to find records from one table which does not exist?
SELECT CALL.* FROM CALL LEFT JOIN Phone_book ON CALL.id = Phone_book.id WHERE Phone_book.name IS NULL SELECT t1.ColumnID, CASE WHEN NOT EXISTS ( SELECT t2.FieldText FROM Table t2 WHERE t2.ColumnID = t1.ColumnID) THEN t1.FieldText ELSE t2.FieldText END FieldText FROM Table1 t1, Table2 t2
How to return rows from left table not found in right table?
FROM first_table f LEFT JOIN second_table s ON f.key=s.key WHERE s.key is NULL I also like to use NOT EXISTS. When it comes to performance if index correctly it should perform the same as a LEFT JOIN or better. Plus its easier to read.
When to use not in, outer apply, or not exists in SQL Server?
I am using SQL Server 2000. Should I use NOT IN, OUTER APPLY, LEFT OUTER JOIN, EXCEPT, or NOT EXISTS? SELECT * FROM TableA WHERE NOT EXISTS ( SELECT NULL FROM TableB WHERE TableB.ID = TableA.ID ) SELECT * FROM TableA WHERE ID NOT IN ( SELECT ID FROM TableB ) SELECT TableA.*
Is there a not exist version of SQL Server join?
As jarlh pointed out in the comments, not in might lead to surprising results when there are nulls in the subquery. So, here is the not exists version: It doesn’t require any join. Thanks for contributing an answer to Stack Overflow!
How to select those not found in in ( ) list?
The IN () function is what I would like to use for the query. How do I find the list of Customers that where NOT returned or did not find a match from the list? Suppose the Customers table only has (1,79,100). Then it would mean 14 and 123 will not be matched. How do I find those values that do not find a match. I was simplifying in my example.
How to find records from two table in SQL?
With large tables the database will most likely choose to scan both tables. You should create indexes both Phone_Book and Call containing the phone_number. If performance is becoming an issue try an lean index like this, with only the phone number: The fewer fields the better since it will have to load it entirely.