今天查资料查到7年前自己写的blog,被网上转载了几十次,却没一个把我的原文链接标记出来,鄙视一下。
找了半天才找到原贴:http://huxiao.iteye.com/blog/629030
就像我们平时用的*和?,sql的like语句中,使用%和_来代表任意多个字符和一个字符
# %代表任意多个字符
select * from user where username like '%huxiao';
select * from user where username like 'huxiao%';
select * from user where username like '%huxiao%';
# %代表一个字符
select * from user where username like '_';
select * from user where username like '______';
select * from user where username like 'huxia_';
select * from user where username like 'h_xiao';
如果我就真的要查%或者,怎么办呢?使用escape,转义字符后面的%或就不作为通配符了,注意前面没有转义字符的%和_仍然起通配符作用
select username from gg_user where username like '%xiao/_%' escape '/';
select username from gg_user where username like '%xiao/%%' escape '/';