INFORMATION_SCHEMA
INFORMATION_SCHEMA is a virtual database in MySQL that stores metadata about the database system and its objects. It provides a structured view of the system, allowing users to retrieve information about databases, tables, columns, indexes, privileges, and more.
The INFORMATION_SCHEMA database contains several tables, each of which contains specific information about the database system. For example, the SCHEMATA table contains information about databases, the TABLES table contains information about tables, and the COLUMNS table contains information about columns.
Users can query the INFORMATION_SCHEMA database using standard SQL statements to retrieve metadata about the database system. For example, to retrieve a list of all tables in a database, one can use the SELECT statement on the TABLES table in the INFORMATION_SCHEMA database.
The INFORMATION_SCHEMA database is useful for database administrators, developers, and users who need to access metadata about the database system. It can be used to diagnose issues, optimize queries, and generate reports about the database system.
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