0

如何解决 FK 约束？用触发器还是别的什么？

#IF "DELETE FROM human where name='a';", error due to the FK contraist.

# If the error, I want in the order:
# FIRSTLY. DELETE FROM address where name='a';
# SECONDLY. DELETE FROM human where name='a';


DROP TABLE human;
DROP TABLE address;

CREATE TABLE human(
        name varchar(300) PRIMARY KEY not null

);

CREATE TABLE address(
        name varchar(300)
                references human.name

);
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2 回答 2

3 
CREATE TABLE address (
    name varchar(300) REFERENCES human (name) ON DELETE CASCADE
);

那是你要的吗？

于 2009-08-31T08:34:09.163 回答
0

第 5.3.5 章。精美手册的外键将非常有帮助。

于 2009-08-31T08:57:09.520 回答