Question

按

计算列组

 cityID, SCity, MCity, BCity, Flag
    10,  null,  400,   null,  0
    12   350,   null,  null,  1
    13   600,   null,  null,  1
    13   700,   null,  null,  1
    15   null,  null,  250,   3

预期结果，CityID分组，城市旁边的MCity和显示计数

cityID, SCitycount, SCity, MCitycount, MCity, Bcitycount, BCity, Flag
    10,  0,         null,   1,          400    0,         null,   0
    12   1,         350,    0,          null   0,         null,   1
    13   2,         1100,   0,          null   0,         null,   1
    15   1,         null,   0,          null   1,         250,    3

这是我到目前为止所拥有的

SELECT 
    cityID,
    SUM(CASE WHEN Flag = 1 THEN SCity END) AS SCity,    
    SUM(CASE WHEN Flag = 0 THEN MCity END) AS MCity,
    SUM(CASE WHEN Flag = 3 THEN Bity END) AS BCity, 
    COUNT(*) as count
FROM #FINALRESULTS
GROUP BY cityID

但这最终会给我一个计数。我想显示每列的计数列

Answer 1

SELECt [cityID], 
COUNT([SCity]), SUM([SCity]),
COUNT([MCity]), SUM([MCity]),
COUNT([BCity]), SUM([BCity]),
[Flag]
FROM Table1 GROUP BY [cityID], [Flag]

<强> SAMPLE FIDDLE

sql count列按ID分组

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