Here, the SQL command retrieves all rows from theCustomerstable where thecountryisUK. Data Control Language (DCL) DCL commands includeGRANTandREVOKE, which are used to control access to the database. i. GRANT In
DCL(Data Control Language)语句:即数据控制语句,用于授权/撤销数据库及其字段的权限(DCL is short name of Data Control Language which includes commands such as GRANT and mostly concerned with rights, permissions and other controls of the database system.)。常用的语句关键字有:GRANT,REVOKE。 TCL(Transac...
InSQL, different types of commands are categorized based on their functionality. These categories include Data Definition Language (DDL), Data Manipulation Language (DML), Data Control Language (DCL), and Transaction Control Language (TCL). Additionally, understanding these categories helps in effectivel...
DCL(Data Control Language) :DCL includes commands such as GRANT and REVOKE which mainly deals with the rights, permissions and other controls of the database system. Examples of DCL commands: GRANT-gives user’s access privileges to database. REVOKE-withdraw user’s access privileges given by u...
DCL(Data Control Language)语句:即数据控制语句,用于授权/撤销数据库及其字段的权限(DCL is short name of Data Control Language which includes commands such as GRANT and mostly concerned with rights, permissions and other controls of the database system.)。常用的语句关键字有:GRANT,REVOKE。
What are the difference between DDL, DML and DCL commands? DDL is Data Definition Language statements. Some examples: CREATE - to create objects in the database ALTER - alters the structure of the database DROP - delete objects from the database ...
DDL,DML,DCL 之间的区别 What are the difference between DDL, DML and DCL commands? DDL,DML和DCL命令之间的区别?(DDL是数据定义语言,如:) DDL is Data Definition Language statements. Some examples: CREATE - to create objects in the database(在数据库中创建对象) ...
(DCL is short name of Data Control Language which includes commands such as GRANT and mostly concerned with rights, permissions and other controls of the database system.)。 常用的语句关键字有:GRANT,REVOKE。 TCL(Transaction Control Language)语句:事务控制语句,用于控制事务, ...
What are the difference between DDL, DML and DCL commands? DDL is Data Definition Language statements. Some examples: CREATE - to create objects in the database ALTER - alters the structure of the database DROP - delete objects from the database TRUNCATE - remove all records from a table,...
DCL（Data Control Language）语句： 即数据控制语句，用于授权/撤销数据库及其字段的权限（DCL is short name of Data Control Language which includes commands such as GRANT and mostly concerned with rights, permissions and other controls of the database system.）。常用的语句关键字有：GRANT,...