Mysql method of querying all databases: 1. Use the MySQL client to log in to the MySQL database server; 2. Directly execute the "SHOW DATABASES;" or "SHOW SCHEMAS;" command to list all databases.
The operating environment of this tutorial: windows7 system, mysql8 version, Dell G3 computer.
To list all databases on the MySQL server host, use theSHOW DATABASEScommand as follows:
SHOW DATABASES;
For example, to list the local MySQL database server For all databases, please first log in to the database server as follows:
C:\Users\Administrator>mysql -u root -p Enter password: ****** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.9 MySQL Community Server (GPL) Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
Then use theSHOW DATABASEScommand:
mysql> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | crmdb | | mysql | | newdb | | performance_schema | | testdb | | yiibaidb | | yiibaidb_backup | +--------------------+ 8 rows in set
SHOW SCHEMAScommand is a synonym forSHOW DATABASES, so the following command will return the same results as above:
mysql> SHOW SCHEMAS; +--------------------+ | Database | +--------------------+ | information_schema | | crmdb | | mysql | | newdb | | performance_schema | | testdb | | yiibaidb | | yiibaidb_backup | +--------------------+ 8 rows in set
If you want to query the database matching a specific pattern, use theLIKEsub Sentence, as shown below:
SHOW DATABASES LIKE pattern;
For example, the following statement returns the database ending with the string "schema";
mysql> SHOW DATABASES LIKE '%schema'; +--------------------+ | Database (%schema) | +--------------------+ | information_schema | | performance_schema | +--------------------+ 2 rows in set
It is important to note that if the MySQL database If the server is started with-skip-show-database, theSHOW DATABASESstatement cannot be used unless you have theSHOW DATABASESpermission.
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