Information schema

In relational databases, the information schema (information_schema) is an ANSI-standard set of read-only views which provide information about all of the tables, views, columns, and procedures in a database. It can be used as a source of the information which some databases make available through non-standard commands, such as:

As a notable exception among major database systems, Oracle does not as of 2015^[update] implement the information schema. An open-source project exists to address this.

RDBMSs which support information_schema include:

RDBMSs which do not support information_schema include:

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