SYS.ALL_CONSTRAINTS的定义如下: CREATE OR REPLACE VIEW ALL_CONSTRAINTS (owner, constraint_name, constraint_type, table_name, search_condition, r_owner, r_constraint_name, delete_rule, status, deferrable, deferred,
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...
分布式数据库中,外键不能跨节点,但触发器可以Ifeither the childorparent objectisaview,thentheconstraintissubjecttoallrestrictionsonviewconstraints. See "ViewConstraints". You cannot define aforeignkeyconstraintinaCREATETABLEstatement thatcontainsanASsubquery clause. Instead, you mustcreatethetablewithout theconstr...
user_constraints: It provides information about constraints owned by the current user. all_constraints:shows information about constraints accessible to the current user, including those owned by other users. dba_constraints: provides information about all constraints in the database and requires DBA pri...
FROM ALL_CONSTRAINTS WHERE table_name = “EMPLOYEES”; Explanation Here, theconstraint_namedepicts the name of the constraint,constraint_typedenotes the types of constraints followed by their value, and table_name depicts the name of the table to which the constraint belongs. TheALL_CONSTRAINTShelps...
Oracle has multiple types of constraints for multiple purposes. In this section, we are going to go through the different types of constraints in Oracle. 1. NOT NULL If we just add a column, by default the column is allowed to hold NULL values but in case there is a requirement that th...
1. 常用视图 (权限由大到小: dba_* > all_* > user_*) (1) dba_constraints : 侧重约束具体信息 (2) dba_cons_columns: 侧重约束列信息 2. 参考如下 select * from dba_constraints dc where dc.owner = 'SCOTT' and dc.table_name = 'EMP'; ...
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 ...
ALL_CONSTRAINTS 视图提供放置在可由当前用户访问的表上的约束的相关信息。 名称 类型 说明 owner TEXT 约束所有者的用户名。 schema_name TEXT 约束所属 schema 的名称。 constraint_name TEXT 约束的名称。 constraint_type TEXT 约束类型。可能值包括: C:检查约束 F:外键约束 P:主键约束 U:唯一键约束...
问禁用Oracle PL/SQL表中的所有相关约束EN使用系统用户登录 [username/password][@server][as sysdba|...