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22 Φεβ 2017 · Using Exists statement to delete data from table: IF EXISTS(SELECT 1 FROM Your_table WHERE user_id = user_id) BEGIN DELETE FROM Your_table WHERE user_id= user_id END Delete table from database : IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'TheSchema' AND TABLE_NAME = 'TheTable') BEGIN --Your delete statement END
22 Αυγ 2016 · Create new database object. The new DROP IF EXISTS syntax replaces the old block of code that used system catalog views to determine the existence of an object. Basically, the new syntax combines steps one and two into a smaller set of code to produce the same results.
27 Νοε 2020 · In such cases, the DROP IF EXISTS statement is useful, as it simplifies the process by eliminating the need to write T-SQL code that queries system catalog views or metadata functions to check for the object’s existence before dropping and recreating it. SYNTAX. DROP OBJECT_TYPE [ IF EXISTS ] OBJECT_NAME.
To remove an existing user-defined function created by the CREATE FUNCTION statement, you use the DROP FUNCTION statement as follows: DROP FUNCTION [ IF EXISTS ] [ schema_name. ] function_name; Code language: SQL (Structured Query Language) (sql) In this syntax: IF EXISTS. The IF EXISTS option allows you to drop the function only if it exists.
16 Ιαν 2015 · In SQL Server you could do something like this. IF EXISTS ( SELECT 1. FROM sys.objects AS o.
3 Μαρ 2020 · DROP Database IF EXISTS. We can use the new T-SQL If Exists scripts for dropping a SQL database as well for SQL 2016 or later.
IF EXISTS. Conditionally drops the function only if it already exists. Available beginning with SQL Server 2016 and in SQL Database. schema_name. Is the name of the schema to which the user-defined function belongs. function_name. Is the name of the user-defined function or functions to be removed. Specifying the schema name is optional.
