SQL-92 - Wikipedia
网页SQL-92 was the third revision of the SQL database query language. Unlike SQL-89, it was a major revision of the standard. Aside from a few minor incompatibilities, the SQL-89 standard is forward-compatible with SQL-92. The standard specification itself grew about five times compared to SQL-89.
SQL-92 - 維基百科，自由的百科全書
网页SQL-92 是 SQL 資料庫 查詢語言 規範的第三次修訂。. 與SQL-89不同的是，此次修訂是 SQL 資料庫 查詢語言 標準的一次改動較大的修訂。. 除了一些小細節不兼容之外，SQL-92可以向前兼容SQL-89標準。. 與SQL-89相比，SQL-92規範內容增長了大約五倍 [1]。.
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
网页One primary advantage of the SQL-92 join notation is that there is a standard and relatively sane way of writing LEFT OUTER JOIN and variants. Each DBMS had its own variant syntax (usually bad; actually, I think, without exception the notations were bad) and often with slightly different semantics.
SQL 为什么ANSI-92标准比ANSI-89标准更好普及 - 极客教程
网页更强的数据完整性约束：ANSI-92标准引入了CHECK约束、UNIQUE约束和FOREIGN KEY约束等，用于保证数据的完整性和一致性。 更丰富的数据类型支持：ANSI-92标准支持更多的数据类型，如日期/时间类型、大对象类型和字符类型等。 这使得开发人员可以更好地处理不同类型的数据。 支持存储过程和触发器：ANSI-92标准引入了存储过程和触发器的概念，使得开发人员可以将业务逻辑封装在数据库中，提高数据库的性能和安全性。 为什么ANSI-92 …
sql - 为什么 SQL ANSI-92 标准没有比 ANSI-89 更好地采 …
网页在我工作过的每一家公司，我发现人们仍在使用 ANSI-89 标准编写 SQL 查询： select a.id, b.id, b.address_1 from person a, address b where a.id = b.id
SQL-92 Characteristics (What is it?) - RelationalDBDesign
网页Significant new Features of SQL 1992. New data types defined: DATE, TIME, TIMESTAMP, INTERVAL, BIT string, VARCHAR strings, and NATIONAL CHARACTER strings. Support for additional character sets beyond the base requirement for representing SQL statements.
SQL-92 Levels: Entry, Intermediate, Full versus Core SQL:1999 …
网页SQL-92 defines three conformance levels: entry, intermediate and full. Conformance claims must state to which level they are claiming conformance. 1 Most database just conform to entry-level. 2. Optional Features since SQL:1999. Starting with SQL:1999 all features are enumerated and either flagged mandatory or optional.
SQL-92 - Service Architecture
网页SQL-92 was developed by the ANSI (then NCITS, and now INCITS) X3H2 committee, which originally began work on a SQL standard in 1982. SQL-92 does not address objects in any way. Nevertheless, SQL-92 forms the basis for JDBC, SQLJ, SQL:1999, and ODMG OQL.
Understanding the Implications of ANSI SQL92 SET Options
网页2003年2月14日 · manipulate ANSI DEFAULTS settings that specify some SQL-92 standard behavior. Together, the SQL-92 standard SET options, including ANSI_NULLS, ANSI_NULL_DFLT_ON, ANSI_PADDING, ANSI_WARNING,...
PostgreSQL: Documentation: 16: Appendix D. SQL Conformance
网页SQL-92 defined three feature sets for conformance: Entry, Intermediate, and Full. Most database management systems claiming SQL standard conformance were conforming at only the Entry level, since the entire set of features in the Intermediate and Full levels was either too voluminous or in conflict with legacy behaviors.
- 某些结果已被删除