我正在创建一个试图从外键访问值的数据库.我创建了两个下面的表
CREATE TABLE Component(
ComponentID varchar2(9) PRIMARY KEY
, TypeID varchar2(9) REFERENCES TypeComponent(TypeComponentID)
)
INSERT INTO Component VALUES(192359823,785404309)
INSERT INTO Component VALUES(192359347,785404574)
INSERT INTO Component VALUES(192359467,785404769)
INSERT INTO Component VALUES(192359845,785404867)
INSERT INTO Component VALUES(192359303,785404201)
INSERT INTO Component VALUES(192359942,785404675)
CREATE TABLE TypeComponent (
TypeComponentID varchar2(9) PRIMARY KEY
, Type_Description varchar2(30) CONSTRAINT Type_Description
CHECK(Type_Description IN('Strap', 'Buckle', 'Stud')) NOT NULL
)
INSERT INTO TypeComponent VALUES(785404309, 'Strap')
INSERT INTO TypeComponent VALUES(785404574, 'Stud')
INSERT INTO TypeComponent VALUES(785404769, 'Buckle')
INSERT INTO TypeComponent VALUES(785404867, 'Strap')
INSERT INTO …Run Code Online (Sandbox Code Playgroud)