-- try using "union all"
select * from
(
select * from t1
union all
select * from t2
union all
select * from t3
....
union all
select * from tn
) a where 标题=10
select * from
(
select * from t1
union all
select * from t2
union all
select * from t3
....
union all
select * from tn
) a where 内容 like '%aaa%'
-- try using "union all"
select top 15 * from
(
select * from t1
union all
select * from t2
union all
select * from t3
....
union all
select * from tn
) a where 标题=10
select top 15 * from
(
select * from t1
union all
select * from t2
union all
select * from t3
....
union all
select * from tn
) a where 内容 like '%aaa%'