Dec 7, 2016 · What if I use SELECT 1 -> If condition matches more than one record then your query will fetch all the columns records and returns 1. What if I ...
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Mar 3, 2020 · The syntax for DROP IF EXISTS · It drops the object if it already exists in the SQL database · We can also use it to drop the column or ...
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Feb 8, 2021 · Hi All,. I've got a couple of tables and I'm trying to use IF EXISTS to decide if I need to get details another table or just carry on with ...
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The EXISTS operator is used to test for the existence of any record in a subquery. The EXISTS operator returns TRUE if the subquery returns one or more records.
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Apr 5, 2024 · NOT EXISTS works as the opposite as EXISTS. The WHERE clause in NOT EXISTS is satisfied if no rows are returned by the subquery. The following ...
Use IF EXISTS Instead of SELECT COUNT(*) You should use IF EXISTS instead of SELECT COUNT(*) when checking only for the existence of any matching data ...
Dec 6, 2016 · When using EXISTS or NOT EXISTS the SQL Server generated query plan with NESTED LOOP operation assuming that it should go over all rows in the ...
Sep 11, 2019 · I have a fairly simple stored procedure that checks to see if a value is present in a view. It's horribly slow when it's executed one way, ...
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Sep 30, 2017 · The only reason I can think of using the if exists method is if there are UPDATE/DELETE triggers in the table that you want to avoid being fired ...
Aug 22, 2016 · One new feature is the DROP IF EXISTS syntax for use with Data Definition Language (DDL) statements. Twenty existing T-SQL statements have this ...