Welcome to ShenZhenJia Knowledge Sharing Community for programmer and developer-Open, Learning and Share
menu search
person
editAsk a Question
Welcome To Ask or Share your Answers For Others

Categories

mysql小白-添加复杂约束的语法

in Technique[技术] by (71.8m points)

需求：往 student表 中添加 邮政编码postcode列
要求：字符型，长度为6，可以为空，若不为空则要求postcode只能为数字，不能为其他字符


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
thumb_up_alt 0 like thumb_down_alt 0 dislike
1.4k views
Welcome To Ask or Share your Answers For Others

1 Answer

by (71.8m points)

你这用程序来约束不好吗


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
thumb_up_alt 0 like thumb_down_alt 0 dislike
Welcome to ShenZhenJia Knowledge Sharing Community for programmer and developer-Open, Learning and Share

Just Browsing Browsing

548k questions

547k answers

4 comments

86.3k users

Most popular tags

Theme made by Momin Raza, Modified by Ostack
Powered by Question2Answer
...