SELECT a.table_name, a.constraint_name FROM all_constraints a WHERE a.constraint_type = 'R' AND a.owner = 'YOUR_SCHEMA_NAME'; 将YOUR_SCHEMA_NAME替换为你的schema名称。 禁用单个外键约束 要禁用单个外键约束,你可以使用ALTER TABLE语句结合DISABLE CONSTRAINT子句。 ALTER TABLE your_table_name DISABLE...
ORA-00256: 无法翻译归档目的字符串 ORA-00257: 存档器错误。在释放之前仅限于内部连接 ORA-00258: NOARCHIVELOG 模式下的人工存档必须标识日志 ORA-00259: 日志 (打开线程 ) 为当前日志,无法存档 ORA-00260: 无法找到联机日志序列 (线程 ) ORA-00261: 正在存档或修改日志 (线程 ) ORA-00262: 当前日志 (关闭...
alter table tbl_employee disable constraint fk_emp; 删除约束: alter table tbl_department drop constraint pk_dept; 查询约束: select CONSTRAINT_NAME from user_constraints where table_name='TBL_EMPLOYEE'; select CONSTRAINT_NAME,COLUMN_NAME from user_cons_columns where table_name='TBL_EMPLOYEE'; 3....
架构:列出要导入的架构子集,以区分大小写的方式表示为分号分隔列表。 例如,schema1;schema2。 如果该列表为空,则导入所有用户架构。 所有系统架构 (例如,默认情况下,SysAdmin) 和 对象将被忽略。 可接受的架构名称模式可以是静态名称,也可以包含通配符 %。 例如:A%;%B;%C%;D ...
它的列与 ALL_CONSTRAINTS 中的列相同。 名称类型说明 owner name 约束的拥有者 constraint_schema name constraint_name name 约束名字 constraint_type text 索引类型 table_schema name table_name name 约束所在的表的名字 r_owner name 被引用约束的拥有者 r_constraint_schema name r_constraint_name name...
To configure RMAN, we have to create a user to be the catalog owner and grant this user a quota on the tablespace where the schema is going to live, as well as the RECOVERY_CATALOG_OWNER role. Open RMAN command line by typing the following command in the command prompt: rman Next, ...
Statement for granting the DML permission on all tables in the SCHEMA:GRANT SELECT, UPDATE, INSERT, DELETE, INDEX, ALTER ON ALL TABLES IN SCHEMA <schema> TO <user> Statement for granting the DML permission on a specified table in the SCHEMA:GRANT SELECT, UPDATE, INSERT, DELETE, INDEX, ALT...
in stored procedures, 15-18 constraints, 1-57 alternatives to, 25-5 applications can find violations, 25-6 CHECK, 25-21 default values and, 25-24 defined, 10-4 disabling temporarily, 25-7 effect on performance, 25-7 ENABLE or DISABLE, 25-26 enforced with indexes, 10-25...
Theuser_constraintsare utilized to display the names of the constraints in the database. Theall_constraintsprovides the metadata about all constraints that are accessible to the current user, regardless of the schema. Commonly Used Constraints in Oracle SQL ...
set constraint[s] constraint_name/all immediate/deferred; 2. sql> drop table table_name cascade constraints sql> drop tablespace tablespace_name including contents cascade constraints 3. define constraints while create a table sql> create table xay(id number(7) constraint xay_id primary key deferra...