sql drop db

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2  DROP DATABASE databasename; 

1The DROP DATABASE statement drops all tables in the database and deletes the database permanently. Therefore, you should be very careful when using this statement.
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3The following shows the syntax of the DROP DATABASE statement:
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5DROP DATABASE [IF EXISTS] database_name;
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9In MySQL, the schema is the synonym for the database, therefore, you can use them interchangeably:
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11DROP SCHEMA [IF EXISTS] database_name;