set nocount on use tempdb go if (object_id ('t1' ) is not null ) drop table t1 create table t1 (n int ) insert into t1 select 2 union select 3 if (object_id ('t2' ) is not null ) drop table t2 create table t2 (n int ) insert into t2 select 1 union select 2 union select 3 union select 4 select * from t2 where n> all (select n from t1 ) --4 select * from t2 where n> any (select n from t1 ) --3,4 --select * from t2 where n>some(select n from t1) --3,4 select * from t2 where n= all (select n from t1 ) --無數據 select * from t2 where n= any (select n from t1 ) --2,3 --select * from t2 where n=some(select n from t1) --2,3 select * from t2 where n< all (select n from t1 ) --1 select * from t2 where n< any (select n from t1 ) --1,2 --select * from t2 where n<some(select n from t1) --1,2 select * from t2 where n<> all (select n from t1 ) --1,4 select * from t2 where n<> any (select n from t1 ) --1,2,3,4 --select * from t2 where n<>some(select n from t1)--1,2,3,4 set nocount off
注意，如果t1中包含null數據，那么所有All相關的比較運算將不會返回任何結果，原因就不用多解釋了。而因為t1和t2表的null的存在他們和not exists之類的比較符會有一些區別。 比如下面兩句 select * from t2 a where not exists(select 1 from t1 where n>=a.n) select * from t2 where n >all(select n from t1) 他們邏輯上意義很像但是對于null的處理卻是恰恰相反，第一句會忽略子查詢的null而把t2的null同時查出來，第二句卻是忽略了t2的null同時會因為t1中的null而無法查詢到數據。
