Read or Download MySQL Pocket Reference: SQL Functions and Utilities (Pocket Reference (O'Reilly)) by George Reese (27-Jul-2007) Paperback PDF
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Additional info for MySQL Pocket Reference: SQL Functions and Utilities (Pocket Reference (O'Reilly)) by George Reese (27-Jul-2007) Paperback
DO DO expression [, expression, ... ] Executes expressions with out returning any effects. SQL | fifty nine DROP DATABASE DROP DATABASE [IF EXISTS] identify completely eliminate a database from MySQL. when you execute this assertion, not one of the tables or facts that made up the database can be found. All aid records for the database are deleted from the filesystem. The variety of documents deleted can be back to the person. This assertion is reminiscent of operating the mysqladmin drop application. As with working mysqladmin, you want to be the executive consumer for MySQL (usually root or mysql) to accomplish this assertion. you'll use the IF EXISTS clause to avoid any blunders message that might consequence from an try and drop a nonexistent database. DROP occasion DROP occasion [IF EXISTS] identify Drops the desired occasion from MySQL. you want to have the development privilege so as to drop an occasion. DROP functionality DROP functionality [IF EXISTS] identify Will get rid of a user-defined or kept functionality from the operating MySQL server method. this doesn't really delete the library dossier containing the functionality. you'll upload the functionality back at any time utilizing the CREATE functionality assertion. within the present implementation, DROP functionality easily gets rid of the functionality from the functionality desk in the MySQL database. This desk retains tune of all lively services. DROP INDEX DROP INDEX idx_name ON tbl_name presents compatibility with different SQL implementations. In older models of MySQL, this assertion does not anything. As of three. 22, this assertion is similar to adjust desk ... DROP INDEX. to accomplish the DROP INDEX assertion, you need to have decide upon, INSERT, DELETE, replace, CREATE, and DROP privileges for the desk in query. 60 | MySQL Pocket Reference DROP approach DROP strategy [IF EXISTS] identify gets rid of the desired approach from the database. you want to have adjust regimen permissions for the approach so one can execute this name. DROP desk DROP desk [IF EXISTS] identify [, name2, ... ] [RESTRICT | CASCADE] Will erase a whole desk completely. within the present implementation, MySQL easily deletes the records linked to the desk. As of three. 22, you'll specify IF EXISTS to make MySQL no longer go back an blunders in the event you try to eliminate a desk that doesn't exist. The limit and CASCADE keyword phrases do not anything; they exist exclusively for ANSI compatibility. you need to have DELETE privileges at the desk to exploit this assertion. DROP TABLESPACE DROP TABLESPACE tablespace ENGINE = engine Drops the desired tablespace. The tablespace mustn't ever comprise any info documents. you have to accordingly ensure you get rid of all facts records first by utilizing the adjust TABLESPACE command. DROP set off DROP set off [IF EXISTS] set off Drops the desired set off from MySQL. whilst upgrading from MySQL five. zero. 10 and previous to any later model, you need to first drop your triggers ahead of the improve after which re-add them. DROP consumer DROP consumer person Drops a consumer from MySQL together with his permissions. SQL | sixty one DROP VIEW DROP VIEW [IF EXISTS] view [RESTRICT | CASCADE] Drops the desired view from the method.