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USE
Syntax
USE db_name |
The USE db_name
statement tells MySQL to use the db_name
database as the default database for subsequent queries. The database remains
current until the end of the session or until another USE
statement
is issued:
mysql> USE db1; mysql> SELECT COUNT(*) FROM mytable; # selects from db1.mytable mysql> USE db2; mysql> SELECT COUNT(*) FROM mytable; # selects from db2.mytable |
Making a particular database current by means of the USE
statement
does not preclude you from accessing tables in other databases. The following example
accesses the author
table from the db1
database and the
editor
table from the db2
database:
mysql> USE db1; mysql> SELECT author_name,editor_name FROM author,db2.editor -> WHERE author.editor_id = db2.editor.editor_id; |
The USE
statement is provided for Sybase compatibility.