配置单元联接查询性能

Question

我想将表A与B在A.id = B.id上连接起来，如下所示：

select A.id,B.name from (select * from TABLEa)A 
LEFT JOIN (select * from TABLEb where partition IN ('GOP','LOP')B on A.id=B.id

在这里，我的TABLEb被两个值GOP和LOP分区。

我还尝试对以下方法进行相同的查询：

insert overwrite table final 
select A.id,B.name from (select * from TABLEa)A 
LEFT JOIN (select * from TABLEb where partition IN ('GOP')B on A.id=B.id;
insert INTOtable final 
select A.id,B.name from (select * from TABLEa)A 
LEFT JOIN (select * from TABLEb where partition IN ('LOP')B on A.id=B.id;

任何人都可以说出哪种方法更好吗？ 原因和原因或使第二个与第一个不同的原因。

请帮忙

Answer 1

select
    A.id,
    B.name
from
    TABLEa as A 
    LEFT JOIN TABLEb as B on partition IN ('GOP','LOP') and A.id=B.id