select * from ( select * from a union all select * from b union all select * from c union all select * from d union all select * from e ) t where title = '白居易'
select * from a where title ='白居易' union all select * from b where title ='白居易' union all select * from c where title ='白居易' union all select * from d where title ='白居易' union all select * from e where title ='白居易'
(
select * from a
union all
select * from b
union all
select * from c
union all
select * from d
union all
select * from e
) t
where title = '白居易'
select * from b where title ='白居易' union all
select * from c where title ='白居易' union all
select * from d where title ='白居易' union all
select * from e where title ='白居易'