SQL> select * from t;未选定行SQL> desc t 创建存储过程CREATE OR REPLACE PROCEDURE truncate_table_t ISBEGIN EXECUTE IMMEDIATE 'truncate table test.t';END;/ 执行存储过程BEGIN truncate_table_t;END;/SQL> select * from t;未选定行综上所述，在Oracle存储过程中确实可以使用TRUNCATE...
Pl/SQL Truncate Table You should consider about using Truncate table statement in your Pl/SQL code. Truncate table have better performance but you cannot rollback data after truncate. Truncate table can be executed in combination with EXECUTE IMMEDIATE command in Pl/SQL code....
用户1若要TRUNCATE用户2的表,则用户1需要有DROP ANY TABLE的权限。但是,DROP ANY INDEX和DROP ANY TABLE的权限过大,一般不能赋予普通用户这2个权限,那么可以通过写存储过程来实现该功能,如下所示: CREATE OR REPLACE PROCEDURE PRO_TRUNC_DROP_LHR(COMMAND IN VARCHAR2, O_TYPE IN VARCHAR2, OWNER IN VARCHAR2...
To specify the CASCADE clause, all affected child tables must be in your schema or you must have the DROP ANY TABLE system privilege. You can truncate a private temporary table with the existing TRUNCATE TABLE command. Truncating a private temporary table will not commit and existing transaction...
【PL/SQL】三种删除方式 Delete,Truncate,Drop 看完这章你会学习到以下内容: 它们的共同点 它们的不同点 相同点: 它们都可以删除数据,清理那些无关紧要,与业务无关的数据。 不同点: 1.语句方面 delete语句是dml,这个操作会放到rollback segement中,事务提交之后才生效;如果有相应的trigger,执行的时候将被触发....
// command: // SELECT * FROM USER_CONSTRAINTS WHERE TABLE_NAME = "tabnam"; 比较清楚地说明了问题,以及解决方法:可以在执行前,先禁用外键约束,执行truncate后再恢复外键约束。 4. 禁用外键约束,删除后执行恢复操作 看到外键约束名称:FK_TBL_B_A: ...
Oracle Database11gEnterpriseEdition Release11.2.0.1.0 – Production //建立父表t SQL> create table t (id number, name varchar2(100)); Table created SQL> alter table t add constraint pk_t_id primary key (id); Table altered //建立字表m ...
BANNER_LEGACY : Oracle Database 21c Enterprise Edition Release 21.0.0.0.0 - Production CON_ID : 0 PL/SQL procedure successfully completed. 2.测试环境建立: SCOTT@book01p> create table t4 (id number ,text clob); Table created. SCOTT@book01p> insert into t4 select rownum,to_char(rownum)|...
SQL DROP Statement:The SQL DROP command is used to remove an object from the database. If you drop a table, all the rows in the table is deleted and the table structure is removed from the database. Once a table is dropped we cannot get it back, so be careful while using DROP ...
在PL/SQL语言中,使用INSERT命令可以将新的数据行追加到表中。使用该命令可以向表中插入整行数据,也可以对部分列插入数据。在Oracle数据库中使用它,一次只能向表中添加一行记录。 4.2.1 添加操作的基本语法 在PL/SQL中,INSERT命令的基本语法如下: INSERT [INTO] table_or_view_name [ ( column_list ) ] VALUE...