mysql> insert into t_tudent values(112,'爱国的吴京',6); ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`test_wl`.`t_tudent`, CONSTRAINT `t_tudent_ibfk_1` FOREIGN KEY (`t_class`) REFERENCES `t_class` (`class_num`)) 1. 2. 3. 4. 5...
--先使用disable validate使外键失效 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; I...
oracle enable / disable all constraint begin for i in (select constraint_name, table_name from user_constraints where table_name='') LOOP execute immediate 'alter table '||i.table_name||' enable constraint '||i.constraint_name||''; end loop; end; / COMMIT; -- begin for i in (selec...
declarenumnumber;beginselectcount(1)intonumfromall_tableswhereTABLE_NAME='TEST2';ifnum=1thenexecuteimmediate'drop table TEST2';endif;end;/createtableTest2( col1intCONSTRAINTcons_test2_1NOTNULLCHECK(col1>10) ENABLE VALIDATE, col2varchar(100)null);/insertintoTest2(col1,col2)values(1,'a'); 在...
ORA-00001: unique constraint (ZHOUYF.SYS_C0010843) violated 默认是validate SQL> alter table t disable novalidate constraint SYS_C0010843 keep index; Table altered. SQL> insert into t values(1); insert into t values(1) * ERROR at line 1: ...
The syntax to disable a foreign key in Oracle/PLSQL is: ALTER TABLE table_name DISABLE CONSTRAINT constraint_name;Example If you had created a foreign key as follows: CREATE TABLE supplier ( supplier_id numeric(10) not null, supplier_name varchar2(50) not null, contact_name varchar2(50)...
SQL> alter table a modify constraint ck_a disable validate; Table altered. --oracle 的语法真奇怪,前面我使用的是alter table a disable validate constraint ck_a;也可以。 --还是这里使用的语法更好1点。 SQL> insert into a values(19);
insert into test values(5, 'Oracle') ORA-02290:违反检查约束条件(MYHR.CK_ID) SQL> insert into test values(17,'ERP'); 1 row inserted SQL> commit; Commit complete 4测试2: Enable Novalidate SQL> alter table test disable constraint ck_id; ...
What is enable and disable constraints in Oracle? Constraints specified in the enable and disable clauses of a CREATE TABLE statement must be defined in the statement. ... If you define a constraint but do not explicitly enable or disable it, ORACLE enables it by default....
This constraint will be checked prior to starting any batch. The value of this field should be between 5 and 100, inclusive. If both maxBatchInstancePercent and maxUnhealthyInstancePercent are assigned with value, the value of maxBatchInstancePercent should not be more than maxUnhealthyInstance...