Question

我想在下面使用GROUP BY聚合我的SQL查询，但是我不确定如何将内部SELECT包含到GROUP BY子句中。是否可以像GROUP BY PEOPLE.NAME, PEOPLE.ADDRESS, CITY那样做？

SELECT PEOPLE.NAME AS NAME,
 PEOPLE.ADDRESS AS ADDRESS,
 (SELECT PEOPLE.CITY 
  FROM ... 
  WHERE ...) AS CITY
FROM MYSCHEMA.PEOPLE PEOPLE
GROUP BY PEOPLE.NAME, PEOPLE.ADDRESS

Answer 1

使用JOIN：

SELECT p.NAME AS NAME, p.ADDRESS AS ADDRESS, c.CITY 
FROM MYSCHEMA.PEOPLE p LEFT JOIN
     (SELECT . . .
      FROM ... 
      WHERE ...
     ) c
     ON . . . 
GROUP BY p.NAME, p.ADDRESS, c.CITY;

在GROUP BY子句中包含子查询

1 个答案: