In this section, we will be discussing types of SQL commands. SQL Commands are divided into five broad categories – DDL, DML, DCL, TCL, and DQL. Each category is further explained below: 1. Data Definition Language(DDL): The Data Definition Language is made up of SQL commands that can ...
☉DISTINCT:数据去重; ☉SQL_CACHE:显式指定缓存查询语句的结果; ☉SQL_NO_CACHE:显式指定不缓存查询语句的结果; ☉query_cache_type服务器变量有三个值: ON:启用; SQL_NO_CACHE:不缓存;默认符合缓存条件都缓存; OFF:关闭; DEMAND:按需缓存; SQL_CACHE:缓存;默认不缓存; ☉字段可以使用别名: col1 AS alias...
Related resources for DCL Commands in SQL Server Grant and Revoke Command in SQL Server12/18/2022 6:10:42 PM. Grant SQL statement grants permissions on an object to a user. Revoke removes permissions on an object. In this article, learn about Grant and Revoke in SQL Server....
The declarations generator (DCLGEN) produces an SQL DECLARE TABLE statement and a COBOL, PL/I, or C data declaration for a table or a view named in the catalog. Environment for DCLGEN The declarations generator is executed by the DSN subcommand DCLGEN. That subcommand can be issued from a...
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