Efficiently Retrieving Table Names from Specific Databases with SQL
Managing multiple database servers (e.g., MySQL, MS SQL Server) often requires extracting specific database information. A frequent task is obtaining a list of table names from a designated database.
While the generic query:
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'
retrieves all tables across all databases on a server, it's often necessary to limit results to a single database. The precise SQL syntax for this varies across database systems.
Database-Specific Queries:
The following examples demonstrate how to retrieve table names from a specific database:
SQL Server:
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_CATALOG='dbName'
Remember to substitute "dbName"
with your target database's name.
MySQL:
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_SCHEMA='dbName'
Replace "dbName"
with the desired database name.
Oracle:
Oracle uses a slightly different approach:
SELECT TABLE_NAME FROM DBA_TABLES WHERE OWNER='dbName'
Here, "dbName"
represents the database user who owns the tables. Note that this query requires appropriate privileges.
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