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建立測試表查看版本信息
select version();
5.7.22創建父表
drop table if exists Models;
CREATE TABLE Models
(
ModelID SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
Name VARCHAR(40) NOT NULL,
PRIMARY KEY (ModelID)
);創建子表
drop table if exists Orders;
CREATE TABLE Orders
(
ID SMALLINT UNSIGNED NOT NULL PRIMARY KEY,
ModelID SMALLINT UNSIGNED NOT NULL,
Description VARCHAR(40),
FOREIGN KEY (ModelID) REFERENCES Models (ModelID)
ON DELETE cascade
);測試測試用例 - 無父表相應數據，先插入子表
insert into Orders(Id,ModelID,Description) values (1,1, a結果：執行失敗
異常：[2018-07-31 11:08:01] 23000 Cannot add or update a child row: a foreign key constraint fails (bov.Orders, CONSTRAINT Orders_ibfk_1 FOREIGN KEY (ModelID) REFERENCES Models (ModelID) ON DELETE CASCADE)
原因：通不過 on delete cascade 的外鍵約束檢查
測試用例 - 先插入主表數據，再插入子表數據
insert into Models(ModelID,Name) values (1, a
insert into Orders(Id,ModelID,Description) values (1,1, a
結果：執行成功
select * from Models;
1 a
select * from Orders;
1 1 a測試用例 - 父子表都有數據，刪除子表數據
delete from Orders where id = 1;結果：執行成功
select * from Models;
1 a
select * from Orders;
為空測試用例 - 父子表都有數據，刪除父表書庫
delete from Models where ModelID = 1;結果：執行成功
select * from Models;
select * from Orders;
為空測試用例 - 父子表都有數據，更新子表外鍵
update Orders set ModelID = 3 where ID =1;結果：執行失敗
異常：[2018-07-31 12:33:02] 23000 Cannot add or update a child row: a foreign key constraint fails (bov.Orders, CONSTRAINT Orders_ibfk_1 FOREIGN KEY (ModelID) REFERENCES Models (ModelID) ON DELETE CASCADE)
原因：通不過 on delete cascade 的外鍵約束檢查
測試用例 - 父子表都有數據，更新父表主鍵
update Models set ModelID = 2 where ModelID =1;結果：執行失敗
異常：[2018-07-31 12:34:24] 23000 Cannot delete or update a parent row: a foreign key constraint fails (bov.Orders, CONSTRAINT Orders_ibfk_1 FOREIGN KEY (ModelID) REFERENCES Models (ModelID) ON DELETE CASCADE)
原因：通不過 on delete cascade 的外鍵約束檢查
測試用例 - 父子表都有數據，更新子表非外鍵
update Orders set Description = b where ID =1;結果：執行成功
select * from Orders;
1 1 b測試用例 - 父子表都有數據，更新父表非主鍵
update Models set Name = c where ModelID =1;結果：執行成功
select * from Models;
1 c感謝各位的閱讀！關于“Mysq 中 l 建立測試父表、子表及測試用例的示例”這篇文章就分享到這里了，希望以上內容可以對大家有一定的幫助，讓大家可以學到更多知識，如果覺得文章不錯，可以把它分享出去讓更多的人看到吧！
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