| 词条 | SQL/Schemata |
| 释义 |
The SQL/Schemata, or Information and Definition Schemas, part to the SQL standard is defined by ISO/IEC 9075-11:2008. SQL/Schemata defines the information schema and definition schema, providing a common set of tools to make SQL databases and objects self-describing. These tools include the {{clarify span|SQL object identifier|date=December 2012}}, {{clarify span|structure|date=December 2012}} and integrity constraints, {{clarify span|security and authorization specifications|date=December 2012}}, features and {{clarify span|packages|date=December 2012}} of ISO/IEC 9075, support of features provided by SQL-based DBMS implementations, SQL-based DBMS implementation information and {{clarify span|sizing items|date=December 2012}}, and the {{clarify span|values supported|date=December 2012}} by the DBMS implementations.[1] SQL/Schemata defines a number of features, some of which are mandatory. See also
References1. ^{{Citation | title = ISO/IEC 9075-11:2008: Information and Definition Schemas (SQL/Schemata) | pages = 1 | year = 2008}} External links{{SQL}}{{DEFAULTSORT:SQL Schemata}}{{database-stub}} 1 : SQL |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。