In relational databases, the information schema (information_schema) is an ANSI-standard set of read-only views that provide information about all of the tables, views, columns, and procedures in a database.
[1] It can be used as a source of the information that 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 that support information_schema include: RDBMSs that do not support information_schema include:
This database-related article is a stub.