比如select * from table_name where column_name like '%%'和select * from table_name where column_name like '%'有什么区别?
我可能没有表述清楚,我想问的是比如select * from table_name where column_name like '%%'和select * from table_name where column_name like '%'有什么区别?
我可能没有表述清楚,我想问的是比如select * from table_name where column_name like '%%'和select * from table_name where column_name like '%'有什么区别?