select sg.group_name gname , sg.* ,si.*
from sys_group sg
left join sys_item si
on sg.item_id = si.item_id
where sg.group_name like '%2%'
and sg.is_del = 1
and sg.Item_id = 49
SQL语句---别名
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转载自blog.csdn.net/weixin_44825473/article/details/114646863
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