The next example shows how check and referential constraints are used in a more complex example.

接下来的例子展示了如何在更复杂的例子中使用检查约束和引用约束。

youdao

The next example shows how check and referential constraints are used in a more complex example.

接下来的例子展示了如何在更复杂的例子中使用检查约束和引用约束。

youdao