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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
The SQL DROP DATABASE Statement. The DROP DATABASE statement is used to drop an existing SQL database. Syntax. DROP DATABASE databasename; Note: Be careful before dropping a database. Deleting a database will result in loss of complete information stored in the database! DROP DATABASE Example.
To remove an existing database from a SQL Server instance, you use the DROP DATABASE statement. The DROP DATABASE statement allows you to delete one or more databases with the following syntax: DROP DATABASE [ IF EXISTS ] database_name [,database_name2,...];
13 Σεπ 2024 · DROP DATABASE [ IF EXISTS ] { database_name | database_snapshot_name } [ ,...n ] [ ; ] Azure SQL Database, Azure Synapse Analytics, and Analytics Platform System syntax. DROP DATABASE database_name [ ; ] Arguments IF EXISTS. Applies to: SQL Server 2016 (13.x) and later versions. Conditionally drops the database only if it already exists ...
24 Μαΐ 2023 · This article describes how to delete a user-defined database in SQL Server by using SQL Server Management Studio or Transact-SQL. Prerequisites. Delete any database snapshots that exist on the database. For more information, see Drop a Database Snapshot (Transact-SQL). If the database is involved in log shipping, remove log shipping. If the ...
IF EXISTS is used to prevent an error from occurring if the database does not exist. If the default database is dropped, the default database is unset (the DATABASE() function returns NULL). If you use DROP DATABASE on a symbolically linked database, both the link and the original database are deleted.
24 Ιουν 2021 · To get the DROP to work properly, you need to execute the ALTER DATABASE from within the target database. That way, you end up being the single user, and even though you then execute a change to master, you hold the required session lock on the DB, and then the drop works as expected.
