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  • ORACLE 行转列 及函数定义

    阿里巴巴项目用到: 

    SELECT LTRIM(MAX(SYS_CONNECT_BY_PATH(ou_code, ';')), ';') AS RESULT
          FROM (SELECT category_id, ou_code, RN, LEAD(RN) OVER(ORDER BY RN) RN1
                  FROM (SELECT category_id,
                               ou_code,
                               ROW_NUMBER() OVER(ORDER BY category_id, ou_code DESC) RN
                          FROM (SELECT t.category_id, t.ou_code
                                  FROM bpm_dcs_category_ou t
                                 WHERE t.category_id=1000085)))
         START WITH RN1 IS NULL
                AND category_id = 1000085
        CONNECT BY RN1 = PRIOR RN;

    函数定义

    CREATE OR REPLACE FUNCTION GET_OU_LIST(I_CATRGORY_ID IN NUMBER) RETURN VARCHAR2 IS
        OU_LIST VARCHAR2(4000) := '';
      BEGIN
        SELECT LTRIM(MAX(SYS_CONNECT_BY_PATH(OU_CODE, ';')), ';')  INTO OU_LIST
          FROM (SELECT CATEGORY_ID, OU_CODE, RN, LEAD(RN) OVER(ORDER BY RN) RN1
                  FROM (SELECT CATEGORY_ID,
                               OU_CODE,
                               ROW_NUMBER() OVER(ORDER BY CATEGORY_ID, OU_CODE DESC) RN
                          FROM (SELECT T.CATEGORY_ID, T.OU_CODE
                                  FROM BPM_DCS_CATEGORY_OU T
                                 WHERE T.CATEGORY_ID=I_CATRGORY_ID)))
         START WITH RN1 IS NULL
                AND CATEGORY_ID = I_CATRGORY_ID
        CONNECT BY RN1 = PRIOR RN;
        RETURN OU_LIST;
      END GET_OU_LIST;

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  • 原文地址:https://www.cnblogs.com/huanghai223/p/1902598.html
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