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Question

我正在使用下面的查询来提取帐户列表以及随附的可选代码。每个帐户有95个代码，而不仅仅是我在下面的结果中显示的2个代码。

SELECT DISTINCT Ref1.ACCOUNT_ID as Acct_Numb,
Current_Date as DATA_DATE,
Cat.OPTIONAL_CTGRY_CD As Code,
Cat.OPTIONAL_CTGRY_CD || ' - ' || Cat.OPTIONAL_CTGRY_NM AS Code_Combo,
Class.OPTIONAL_CLASS_CD as Code_Answer,
Class.OPTIONAL_CLASS_NM as Code_Answer_Desc

FROM xxxxx.zzzzzz_OPT_REF Ref1

LEFT JOIN xxxxx.zzzzzz_OPT_CATEGORY Cat
ON xxxxx.zzzzzz_OPT_REF.OPTIONAL_CTGRY_CD = xxxxx.zzzzzz_OPT_CATEGORY.OPTIONAL_CTGRY_CD

LEFT JOIN xxxxx.zzzzzz_OPT_CLASS Class
ON xxxxx.zzzzzz_OPT_REF.OPTIONAL_CLASS_CD = xxxxx.zzzzzz_OPT_CLASS.OPTIONAL_CLASS_CD
AND xxxxx.zzzzzz_OPT_CATEGORY.OPTIONAL_CTGRY_CD = xxxxx.zzzzzz_OPT_CLASS.OPTIONAL_CTGRY_CD

LEFT JOIN xxxxx.HRTVACT_PCS Acct
ON xxxxx.ACCOUNT_ID = Acct.ACCOUNTID

WHERE xxxxx.ACCOUNTSTATUS = 'OPEN' AND xxxxx.ACCOUNTID = '123456' OR xxxxx.ACCOUNTID = '654321'

ORDER BY ACCT_NUMB ASC, CODE ASC;

以下是结果

DATA_DATE   ACCT_NUMB   CODE   CODE_COMBO      CODE_ANSWER  CODE_ANSWER_DESC
11/8/2016     123456     1    1 - Reporting        0     NOT APPLICABLE
11/8/2016     123456     2    2 - System           4     SYSTEM 2
11/8/2016     654321     1    1 - Reporting        3     APPLIED
11/8/2016     654321     2    2 - System           3     N/A

我需要将结果创建为一个类似于下表的数据透视表。

                       (CODE)  (CODE_COMBO)    (CODE)    (CODE_COMBO)   
DATA_DATE   ACCT_NUMB     1    1 - Reporting     2        2 - System
11/8/2016    123456       0    NOT APPLICABLE    4         SYSTEM 2    (CODE_ANSWER)/(CODE_ANSWER_DESC)
11/8/2016    654321       3    APPLIED           3         N/A         (CODE_ANSWER)/(CODE_ANSWER_DESC)

我之前没有尝试过，我感到难过

Answer 1

我过去使用表别名完成了这项操作，因此您可以将表连接到自身。我用4或5列而不是95来完成它所以可能有更好的方法，我不知道。