user:
ID int not null auto_increment primary key,
username varchar
news:
author int not null,
title varchar
user.ID与news.author关联
----------------------------------------------------------------
现想select出news.title与user.username,我的写法如下:
select u.username,
n.title
from user as u,
news as n
where u.ID = n.author;
但news.author为0的数据不能查出,请教如何用1条SQL完成上述功能?
谢谢
select u.username,
n.title
from user as u,
news as n
where u.ID = n.author AND n.author != '0'
顶了
SELECT * FROM news LEFT JOIN user ON(user.username=news.author)
to gun_hzic(新手):
n.author=0也是在选取范围之内的,不能过滤掉
| 论坛热门帖子: | [lch203] 写得蛮好的linux学习笔记(10-21) [黑马制造] 学习java的30个目标(10-19) [笑傲股林] 做测试半年了,有点迷茫,应该再学些什么提高自己的测试水平和测试能力呢?(10-19) [udp8589] 大家用google的来吱一声? 用百度的~~也来报道下?(10-18) [沂偌掳兆] 本人总结的一些认为C++比较经典的书籍,希望对大家有用(10-18) |
| TAG标签: | 请教 n.author as select user news.author news u.username |
注册
个人空间
