| 词条 | Database catalog |
| 释义 |
The database catalog of a database instance consists of metadata in which definitions of database objects such as base tables, views (virtual tables), synonyms, value ranges, indexes, users, and user groups are stored.[1][2] The SQL standard specifies a uniform means to access the catalog, called the INFORMATION_SCHEMA, but not all databases follow this, even if they implement other aspects of the SQL standard. For an example of database-specific metadata access methods, see Oracle metadata. References1. ^{{cite book|title=Systems Development Handbook|author= Paul C. Tinnirello|year=1999|publisher=CRC Press|isbn=0-8493-9822-3}} {{database-stub}}2. ^{{citation|title=CREATE VIEW (Transact-SQL) in SQL Server 2008 Books Online|publisher=Microsoft Corporation|url=http://msdn.microsoft.com/en-us/library/ms187956.aspx}} 1 : Database theory |
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