SQL like 模糊查询

select * from emp;

--查询ename中含有A的字母
select * from emp where ename like ‘%A%‘;

--查询ename中第一个字母是A的输出
select * from emp where ename like ‘A%‘;

--查询ename中末尾字母为S的输出
select * from emp where ename like ‘%S‘;

--查询ename中第2字母为A的输出
select * from emp where ename like ‘_A%‘;

--查询ename中第一个字母是A或C的输出
select * from emp where ename like ‘[A,C]%‘;

--查询ename中首字母不是A和C的输出
select * from emp where ename like ‘[^A,C]%‘;

--escape表示把 ‘\‘当成转移字符
select * from emp where ename like ‘%\%%‘ escape ‘\‘;

--查询ename中首字母不是A的输出
select * from emp where ename not like ‘A%‘;