如何根据特定条件对列中的字段进行分组

Question

以下是查询：

SELECT       REF.TOS                                AS [TOS Value]
        ,RSA_BIRMINGHAM_1941$.Percentage        AS [Birmingham]
        ,RSA_CARDIFFREGUS_2911$.Percentage      AS [Cardiff Regus]
        ,RSA_CASTLEMEAD_1941$.Percentage        AS [Castlemead]
        ,RSA_CHELMSFORD_1941$.Percentage        AS [Chelmsford]



 FROM       
        ( SELECT TOS FROM RSA_BIRMINGHAM_1941$      UNION
         SELECT TOS FROM RSA_CARDIFFREGUS_2911$     UNION
         SELECT TOS FROM RSA_CASTLEMEAD_1941$       UNION
         SELECT TOS FROM RSA_CHELMSFORD_1941$       
       ) AS REF

FULL OUTER JOIN RSA_BIRMINGHAM_1941$        ON REF.TOS =  
RSA_BIRMINGHAM_1941$.TOS
FULL OUTER JOIN RSA_CARDIFFREGUS_2911$      ON REF.TOS =  
RSA_CARDIFFREGUS_2911$.TOS
FULL OUTER JOIN RSA_CASTLEMEAD_1941$        ON REF.TOS =  
RSA_CASTLEMEAD_1941$.TOS
FULL OUTER JOIN RSA_CHELMSFORD_1941$        ON REF.TOS =  
RSA_CHELMSFORD_1941$.TOS

这是输出：

TOS Value      Birmingham    CardiffRegus   Castlemead  Chelmsford
af11 (DSCP 10)  15.22%         4.63%          0.00%      6.16%
af12 (DSCP 12)  0.12%          NULL           NULL       NULL
af21 (DSCP 18)  0.05%          0.05%          0.00%      0.02%
af31 (DSCP 26)  8.86%          13.85%         0.01%      5.59%
af32 (DSCP 28)  NULL           NULL           NULL       0.02%
af33 (DSCP 30)  11.49%         15.44%         NULL       7.33%
af41 (DSCP 34)  0.70%          0.03%          0.01%      0.05%
cs3 (DSCP 24)   0.06%          0.11%          0.01%      0.04%
cs4 (DSCP 32)   0.15%          0.20%          NULL       0.10%
cs6 (DSCP 48)   NULL           0.23%          0.00%      NULL
defau(DSCP 0)   61.37%         61.74%         99.48%     79.78%
ef (DSCP 46)    1.91%          3.72%          0.49%      0.91%

我需要在＆＃34; Parent＆＃34;下对TOS Value列的某些值进行分组。不影响其他列的组，因为它们与TOS值列直接相关。

请参阅下面的图片，了解我需要完成的任务：

Answer 1

你可以做一个冗长的自我加入，但由于这是SQL Server，我们可以利用PIVOT表查询。

SQL Fiddle Example here

SELECT * FROM ( SELECT 'Birmingham' AS [SITE], REF.TOS, Percentage FROM ( SELECT TOS FROM RSA_BIRMINGHAM_1941$ UNION SELECT TOS FROM RSA_CARDIFFREGUS_2911$ UNION SELECT TOS FROM RSA_CASTLEMEAD_1941$ UNION SELECT TOS FROM RSA_CHELMSFORD_1941$ ) AS REF LEFT OUTER JOIN RSA_BIRMINGHAM_1941$ RSA ON RSA.TOS = REF.TOS ) BIRM PIVOT ( SUM(Percentage) FOR TOS in ( [ef (DSCP 46)], [af31 (DSCP 26)], [af32 (DSCP 28)], [af33 (DSCP 30)], [cs3 (DSCP 24)], [cs4 (DSCP 32)], [cs6 (DSCP 48)], [af41 (DSCP 34)], [af42 (DSCP 36)], [af43 (DSCP 38)], [af21 (DSCP 18)], [af22 (DSCP 20)], [af23 (DSCP 22)], [af11 (DSCP 10)], [af12 (DSCP 12)], [af13 (DSCP 14)], [defau(DSCP 0)]) ) PIV UNION ALL SELECT * FROM ( SELECT 'Cardiff Regus' AS [SITE], REF.TOS, Percentage FROM ( SELECT TOS FROM RSA_BIRMINGHAM_1941$ UNION SELECT TOS FROM RSA_CARDIFFREGUS_2911$ UNION SELECT TOS FROM RSA_CASTLEMEAD_1941$ UNION SELECT TOS FROM RSA_CHELMSFORD_1941$ ) AS REF LEFT OUTER JOIN RSA_CARDIFFREGUS_2911$ RSA ON RSA.TOS = REF.TOS ) CARD PIVOT ( SUM(Percentage) FOR TOS in ( [ef (DSCP 46)], [af31 (DSCP 26)], [af32 (DSCP 28)], [af33 (DSCP 30)], [cs3 (DSCP 24)], [cs4 (DSCP 32)], [cs6 (DSCP 48)], [af41 (DSCP 34)], [af42 (DSCP 36)], [af43 (DSCP 38)], [af21 (DSCP 18)], [af22 (DSCP 20)], [af23 (DSCP 22)], [af11 (DSCP 10)], [af12 (DSCP 12)], [af13 (DSCP 14)], [defau(DSCP 0)]) ) PIV UNION ALL SELECT * FROM ( SELECT 'Castlemead' AS [SITE], REF.TOS, Percentage FROM ( SELECT TOS FROM RSA_BIRMINGHAM_1941$ UNION SELECT TOS FROM RSA_CARDIFFREGUS_2911$ UNION SELECT TOS FROM RSA_CASTLEMEAD_1941$ UNION SELECT TOS FROM RSA_CHELMSFORD_1941$ ) AS REF LEFT OUTER JOIN RSA_CASTLEMEAD_1941$ RSA ON RSA.TOS = REF.TOS ) CASTLE PIVOT ( SUM(Percentage) FOR TOS in ( [ef (DSCP 46)], [af31 (DSCP 26)], [af32 (DSCP 28)], [af33 (DSCP 30)], [cs3 (DSCP 24)], [cs4 (DSCP 32)], [cs6 (DSCP 48)], [af41 (DSCP 34)], [af42 (DSCP 36)], [af43 (DSCP 38)], [af21 (DSCP 18)], [af22 (DSCP 20)], [af23 (DSCP 22)], [af11 (DSCP 10)], [af12 (DSCP 12)], [af13 (DSCP 14)], [defau(DSCP 0)]) ) PIV UNION ALL SELECT * FROM ( SELECT 'Chelmsford' AS [SITE], REF.TOS, Percentage FROM ( SELECT TOS FROM RSA_BIRMINGHAM_1941$ UNION SELECT TOS FROM RSA_CARDIFFREGUS_2911$ UNION SELECT TOS FROM RSA_CASTLEMEAD_1941$ UNION SELECT TOS FROM RSA_CHELMSFORD_1941$ ) AS REF LEFT OUTER JOIN RSA_CHELMSFORD_1941$ RSA ON RSA.TOS = REF.TOS ) CHEM PIVOT ( SUM(Percentage) FOR TOS in ( [ef (DSCP 46)], [af31 (DSCP 26)], [af32 (DSCP 28)], [af33 (DSCP 30)], [cs3 (DSCP 24)], [cs4 (DSCP 32)], [cs6 (DSCP 48)], [af41 (DSCP 34)], [af42 (DSCP 36)], [af43 (DSCP 38)], [af21 (DSCP 18)], [af22 (DSCP 20)], [af23 (DSCP 22)], [af11 (DSCP 10)], [af12 (DSCP 12)], [af13 (DSCP 14)], [defau(DSCP 0)]) ) PIV;