SQL 拼接、替换、判断字符串包含
Sql的字符串相加:
Update sight s set s.address=concat(s.province,s.city);
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Sql的字符串相减:
替换。将photo地址的jiangsu 替换为zhejiang
Update sight s set s.photo=replace(s.photo,’jiangsu’,’zhejiang’);
?
Sql 判断字段是否在某字符串中:
如:判断name是否在字符串'adfkadsfshtr'中
select * from User
where instr('adfkadsfshtr.', name)>0