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...
String sql =null; String dbType =getDBType(); if(dbType.contains("ORACLE")){ sql ="select 'alter table ' || table_name || ' disable constraint ' || constraint_name from user_constraints where constraint_type='R' and TABLE_NAME in("; if(isEnable){ sql = sql.replace("disable", ...
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> exec print_table('select constraint_name, constraint_type from user_constraints where table_name=''T1'''); CONSTRAINT_NAME : FK_T1_T2 CONSTRAINT_TYPE : R --- CONSTRAINT_NAME : SYS_C007441 CONSTRAINT_TYPE : C --- CONSTRAINT_NAME : SYS_C007442 CONSTRAINT_TYPE : P --- CONSTRAINT...
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...
-- [WARN] [DISCARD] CONSTRAINT "PK_T_PARTKEY_IS_PK" PRIMARY KEY ("CRT_DTTM") DISABLE NOVALIDATE -> [NULL] -- [WARN] [DISCARD] CHECK ("ACT_ID" IS NOT NULL) DISABLE NOVALIDATE -> [NULL] CREATE TABLE "T_PARTKEY_IS_PK" ( ...
constraint_type='P') m where lower(t.table_name)='表名' and c.table_name=t.table_name and c.column_name=t.column_name and t.hidden_column='NO' order by t.column_id -- 方法三。使用sql命令 desc 表名 -- 14、获取当前模式 -- 这是另一个可以获得当前模式的名字的查询语句。有关sys_...
oracle数据库constraint用法在Oracle数据库中,约束(constraint)用于实施所谓的"业务规则",防止非法信息进入数据库,满足管理员和应用开发人员所定义的规则集。以下是约束的几种类型及其用法: 1.主键约束(Primary Key):对一个列进行约束,要求非空且不重复。格式:alter table [表名] add constraint [约束名称] primary ...
(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...
and c.owner = cc.owner and c.constraint_name = cc.constraint_name order by cc.position; 1. 2. 3. 4. 5. 6. 7. 8. 8、存储函数和过程 复制 查看函数和过程的状态 SQL>select object_name,status from user_objects where object_type='FUNCTION'; ...