SYS.ALL_CONSTRAINTS的定义如下: CREATE OR REPLACE VIEW ALL_CONSTRAINTS AS select OWNER, CONSTRAINT_NAME, CONSTRAINT_TYPE, TABLE_NAME, SEARCH_CONDITION, SEARCH_CONDITION_VC, R_OWNER, R_CONSTRAINT_NAME, DELETE_RULE, STATUS, DEFERRABLE, DEFERRED, VALIDATED, GENERATED, BAD, RELY, LAST_CHANGE, INDEX_...
SELECT* FROMall_constraints WHEREtable_name ='T_USER'ANDowner ='SCOTT'; 结果如下: 1 2 3 4 5 6 7 SQL>SELECT* 2FROMall_constraints 3WHEREtable_name ='T_ORDER'ANDowner ='SCOTT'; OWNER CONSTRAINT_NAME CONSTRAINT_TYPE TABLE_NAME SEARCH_CONDITION R_OWNER R_CONSTRAINT_NAME DELETE_RULE STATU...
select * from user_constraints; select * from all_constraints; select * from dba_constraints; 三、索引及其操作 1、创建索引 create [unique] index 索引名 on 表名(列名1 ASC|DESC,列名2 ASC|DESC,...,列名n ASC|DESC) [tablespace 表空间名]; 注:基表中的列名,一个索引最多有16列,long列、long...
So, we can easily find all the constraints on the table in Oracle using data dictionary views. We can then take whatever action like modify, disable, or drop, we want to take on these constraints. Constraints are enforcing data integrity rules in the Oracle database and we must be careful...
If either the child or parent object is a view, then the constraint is subject to all restrictions on view constraints. See "View Constraints". You cannot define a foreign key constraint in a CREATE TABLE statement that contains an AS subquery clause. Instead, you must create the table witho...
使用下面语句从all_constraints视图中查看某表上的约束: SELECT constraint_name, table_name, r_owner, r_constraint_name...all_constraints WHERE table_name = 'table_name' and owner = 'owner_name'; 另一个视图ALL_CONS_COLUMNS也包括组成表上约束列的信息 ...
USER_CONSTRAINTS、DBA_CONSTRAINTS、ALL_CONSTRAINTS、 USER_CONS_COLUMNS、DBA_CONS_COLUMNS、ALL_CONS_COLUMNS、 USER_INDEXES、DBA_INDEXES、ALL_INDEXES、 USER_IND_COLUMNS、DBA_IND_COLUMNS、ALL_IND_COLUMNS、 USER_TAB_PARTITIONS、DBA_TAB_PARTITIONS、ALL_TAB_PARTITIONS、 ...
使用下面语句从all_constraints视图中查看某表上的约束: SELECT constraint_name, table_name, r_owner, r_constraint_name...all_constraints WHERE table_name = 'table_name' and owner = 'owner_name'; 另一个视图ALL_CONS_COLUMNS也包括组成表上约束列的信息 ...
GRANT ALTER SESSION to oms_user; GRANT CREATE SESSION to oms_user; GRANT CONNECT to oms_user; GRANT SELECT on ALL_CONSTRAINTS to oms_user; GRANT SELECT on ALL_INDEXES to oms_user; GRANT SELECT on ALL_IND_COLUMNS to oms_user; -- 查询对象的一些属性信息 GRANT SELECT on ALL_OBJECTS to ...
SELECT * FROM ALL_CONSTRAINTS; SELECT * FROM USER_CONSTRAINTS; SELECT * FROM DBA_CONS_COLUMNS; SELECT * FROM ALL_CONS_COLUMNS; SELECT * FROM USER_CONS_COLUMNS; 复制代码 约束有四种状态:ENABLE、VALID、INVALID、DISABLE 约束的检查机制 IMMEDIATE语句级:Oracle performs its constraint checking after the...