sql>select constraint_name,constraint_type,status,validated from user_constraints where table_name='Goods'; B、显示列约束 通过查询数据字典视图user_cons_column,可以显示约束所对应的表列信息。 sql>select column_name,position from user_cons_columns where constraint_name='CK_Address'; 6、表级定义和列...
CONSTRAINT_NAME|CONSTRAINT_TYPE|SEARCH_CONDITION|---+---+---+EMP_LAST_NAME_NN|C|"LAST_NAME"ISNOTNULL|EMP_EMAIL_NN|C|"EMAIL"ISNOTNULL|EMP_HIRE_DATE_NN|C|"HIRE_DATE"ISNOTNULL|EMP_JOB_NN|C|"JOB_ID"ISNOTNULL|EMP_SALARY_MIN|C|salary>0|EMP_EMAIL_UK|U||EMP_EMP_ID_PK|P||EMP_...
2. **查询特定表的约束**: ```sql SELECT CONSTRAINT_NAME, CONSTRAINT_TYPE, SEARCH_CONDITION, R_CONSTRAINT_NAME... oracle优化笔记 select c.constraint_name, c.constraint_type, cc.column_name from user_constraints c, user_cons_columns cc where c.owner = upper('&table_owner') and c.table...
SQL> select constraint_name,constraint_type,status from user_constraints Where table name='USERINFO_2'; -> CONSTRAINT_NAME C STATUS --- - --- SYS_CXXXXXXX P ENABLED FK_TYPEID_2 R ENABLED 备注:SYS_CXXXXXXX是主键名称,由系统指定,XXXXXXX是数字。 禁用外键约束,可用如下代码 SQL>alter table user...
CONSTRAINT_TYPE : C SEARCH_CONDITION : "C1" IS NOT NULL --- PL/SQL procedure successfully completed. 1. 2. 3. 4. 5. 6. 7. 8. 因此,答案显而易见了。 但是,为什么是这现象?我们从Oracle官方手册,能看到一些端倪,《SQL Language Reference》谈到了CTAS对于约束的复制能力,除了上述实验中涉及到的...
SQL> col constraint_name for a11 SQL> select CONSTRAINT_NAME ,CONSTRAINT_TYPE,TABLE_NAME ,STATUS,DEFERRABLE,DEFERRED,validated from u ser_constraints where table_name='AA'; CONSTRAINT_ C TABLE STATUSDEFERRABLEDEFERRED VALIDATED --- - --- --- --- --- --- PKP AAENABLED NOT DEFERRABLE IMMED...
(userid); --删除主键 alter table 表名 drop constraint 主键名 --查看当前数据库所有用户 select * from dba_users --添加外键 alter table 表2 add constraint 外键名 foreign key(表2中需要建外键的字段) references 表1 --删除外键 alter table test2 drop constraint fk_test2 --查询某个时间点的数据...
^C Export> status Job: SYS_EXPORT_SCHEMA_01 Operation: EXPORT Mode:SCHEMA State: EXECUTING BytesProcessed: 0 Current Parallelism: 1 JobError Count: 0 DumpFile: /data3/backup/sms2.dmp bytes written: 716,800 Worker 1 Status: State:EXECUTING ObjectSchema: EYGLE ObjectName: MT_HIS ObjectType:...
-- 手工将 T_PARTKEY_IS_PK 表的约束都 disable ALTER TABLE ZHENXING.T_PARTKEY_IS_PK DISABLE NOVALIDATE CONSTRAINT PK_T_PARTKEY_IS_PK; ALTER TABLE ZHENXING.T_PARTKEY_IS_PK DISABLE CONSTRAINT SYS_C0011109; SELECT OWNER, TABLE_NAME, CONSTRAINT_NAME, CONSTRAINT_TYPE, INDEX_NAME, STATUS FROM ...
为Constraint on Column 域选择 PROJECT_PRIORITY,并为 Constraint Expression 输入 in ('1','2','3') 。确保针对 Constraint Type 选择了 Check。然后,单击 Next >。 9. 单击Finish。 10. 该约束创建成功。单击 Home 路径式导航栏。返回主题列表创建应用程序 ...