select * from category where 1=1 order by id desc, 'group' asc
DbKit 会优化为
select count(*) from category where 1=1 , 'group' asc
select * from category where 1=1 order by id desc, 'group' asc
DbKit 会优化为
select count(*) from category where 1=1 , 'group' asc