DROP TABLE cars purge; 一次删除多个表 Oracle不提供直接删除多个表的方法。 但是,可以使用以下PL/SQL块来执行此操作: BEGIN FOR rec IN ( SELECT table_name FROM all_tables WHERE table_name LIKE 'TEST_%' ) LOOP EXECUTE immediate 'DROP TABLE '||rec.table_name || ' CASCADE CONSTRAINTS' END LOOP...
SQL> drop table t; drop table t * ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys (违反了constraint,员工销售表t1有參照到table t,这个reference relation不允许你drop table t) SQL> drop table t cascade constraints; Table dropped. SQL> select * from t1; ...
SQL> drop table t; drop table t * ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys (违反了constraint,员工销售表t1有參照到table t,这个reference relation不允许你drop table t) SQL> drop table t cascade constraints; Table dropped. SQL> select * from t1; ...
Oracle 在Drop表时的Cascade Constraints http://hi.baidu.com/rebooo/item/12b500b130022bf263388e69假设A为主表(既含有某一主键的表),B为从表(即引用了A的主键作为外键)。则当删除A表时,如不特殊说明,则 drop table A 系统会出现如下错误警告的信息而不会允许执行。 ERROR at line 1: ORA-02449: un...
SQL> select CONSTRAINT_NAME,TABLE_NAME from dba_constraints where wner = 'SYS' and TABLE_NAME = 'T1' no rows selected SQL> 我们可以发现利用Drop table cascade constraints可以以刪除关联table t的constraint來达成你drop table t的目的,原來属于t1的foreign key constraint已经跟随着被删除掉了,但是,储存...
Oracle 在Drop表时的Cascade Constraints 假设A为主表(既含有某一主键的表),B为从表(即引用了A的主键作为外键)。则当删除A表时,如不特殊说明,则 drop table A 系统会出现如下错误警告的信息而不会允许执行。 ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys ...
内容提示: 当你要 drop 一个 table 时, 如果删除 table 的动作会造成 trigger 或 constraint 产生矛盾, 系统会出现错误警告的讯息而不会允许执行.。 一个极简单的例子,例如你有一个员工基本资料表,上面可能有员工编号和员工姓名等字段,另外有一个员工销售表,上面有员工编号和员工销售额两个字段,员工薪资表的...
SQL> drop table dept; drop table dept * ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys SQL> SQL> drop table dept cascade constraints; Table dropped. How to drop multiple tables in oracle There might be a requirement to drop multiple tables in a singl...
To drop a table and its data from the Oracle Database, you use the DROP TABLE statement: DROP TABLE table_name [CASCADE CONSTRAINTS | PURGE];Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the table you want to remove in the DROP TABLE...
sql、oracle 好的,我正在寻找学校的oracle,并且在创建我的数据库时遇到了很多问题。我使用的是SQL developer。我的插件出现了多个错误。浏览一下,我没有发现脚本有任何错误。我是新来的,所以别对我太客气。`DROPTABLE ENROLLMENT CASCADE CONSTRAINTSPURGE;DROPTABLE COURSE_SECTION CASCADE CONSTRAINTSPURGE</em ...