Question

我必须根据字段DT进行分组并计算其出现次数。表存储在Google Big Query中。

SELECT c.Id1 AS HId, d.Id1 as PId,e.Type as DT
FROM
[RawGps32.T20160601] c
LEFT JOIN
[VN_20160601] d
ON c.Id1 = d.Id1
INNER JOIN [SF.DT] e
ON d.Id1 = e.Id1
GROUP BY HId, PId,DT
HAVING HId in (3928,3602,1285,4663,96546)

当前结果：

HId     PId     DT
3928    11      G1
3602    12      G3
1285    12      G1
4663    14      G4
96546   15      G1

预期结果

 DT  count
 G1  3
 G3  1
 G4  1

任何帮助都将不胜感激。

Answer 1

最有可能

SELECT e.Type as DT, count(*) as count
FROM
[RawGps32.T20160601] c
LEFT JOIN
[VN_20160601] d
ON c.Id1 = d.Id1
INNER JOIN [SF.DT] e
ON d.Id1 = e.Id1
WHERE c.Id1 in (3928,3602,1285,4663,96546)
GROUP BY e.Type
ORDER BY e.Type

另请注意，由于LEFT JOIN [VN_20160601] d遵循INNER禁止INNER JOIN [SF.DT] e ON d.Id1 = e.Id1处的NULL，因此d.id1实际上是LEFT JOIN。可能两者都应该是.hidden-xs { display: none !important; }。

左和内连接后分组

1 个答案: