mysql5.7 设置密码不生效的一种情况 select user,host,plugin from mysql.user; mysql.user SET authentication_string=PASSWORD('1q!Qqqqq'), plugin='mysql_native_password' WHERE user='root';
Mysql将数据库中重复的数据全部显示出来 select a.id,a.name from survey a join (
select name,count(name) from survey
group by name having count(name)>1
) b on a.name=b.name
where a.type is nu...
SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'oa_api.oa_form_cloud_project_...