SQL> select constraint_name, constraint_type ctype, SEARCH_CONDITION cond, STATUS, DEFERRABLE, DEFERRED, VALIDATED from dba_constraints where table_name='T' and wner='SYS'; CONSTRAINT_NAME CTYPE COND STATUS DEFERRABLE DEFERRED VALIDATED --- --- --- --- --- --- --- C_T_ID1 C id>5...
SQL> alter table f_table disable validate constraint fk_ftable_id; alter table f_table disable validate constraint fk_ftable_id * ERROR at line 1: ORA-02298: cannot validate (ORA1.FK_FTABLE_ID) - parent keys not found SQL> select * from f_table; ID NAME --- --- 1 alina 2 liu...
SQL> select constraint_name,status,validated from dba_constraints where constraint_name = 'DEPT2_U1'; CONSTRAINT_NAME STATUS VALIDATED --- --- --- DEPT2_U1 ENABLED NOT VALIDATED SQL> insert into dept2(deptno) values(10); insert into dept2(deptno) values(10) ORA-00001: unique constraint ...
select t.owner,t.constraint_name,t.status,t.deferrable,t.deferred,t.validated from user_constraints t where t.constraint_name='ID_UNIQUE' t.owner,t.constraint_name,t.status, t.deferrable, t.deferred, t.validated 1 TEST ID_UNIQUE ENABLED NOT DEFERRABLE IMMEDIATE VALIDATED 看到status 与 validat...
1、constraint类型介绍 2、constraint的创建和管理 第一种ENABLED、VALIDATED 第二种DISABLED、NOTVALIDATED 第三种EBABLED、NOTVALIDATED 第四种DISABLED、VALIDATED 3、constraint的种类 3.1、CHECK约束 3.2、NOTNULL约束 3.3、Unique约束 3.4、PrimaryKey约束
R_CONSTRAINT_NAMEString參考資料表之唯一的條件約束定義的名稱。 DELETE_RULEString參考條件約束的刪除規則 (CASCADE 或 NO ACTION)。 狀態String條件約束的強制狀態 (ENABLED 或 DISABLED)。 VALIDATEDString是否所有資料均遵循條件約束 (VALIDATED 或 NOT VALIDATED)。
DISABLED NOT VALIDATED --可以发现状态是DISABLED和NOT VALIDATED,这样可以DML数据: SQL> insert into a values(199); 1 row created. SQL> rollback ; Rollback complete. 3.修改约束属性: SQL> alter table a disable validate constraint ck_a;
oracle 约束[constraint]笔记 //用alert修改约束除了not null外,改变其它的约束都要加constraint关键字,比如 alert table table_1 add[modify] username not null; alert table table_1 add constraint pk_userid primary (userid); alert table table_1 add constraint fk_userid foreign key (userid) ...
select constraints_name ,constraint_type,status , validated from user_constraints where table_name="表明"; 2.显示约束列 查询数据字典user_cons_columns,可以显示约束所对应的表列信息 select column_name ,position from user_cons_columns where constraint_name="约束名"; ...
As previously discussed, a Primary Key or a Unique Key constraint that’s not validated is by default policed by a Unique index regardless. If there are no duplicate values, then no worries (yes, I’m Australian), Oracle will create the Unique index and enable the constraint in a NOVALIDAT...