SQLテーブルを行列形式に変換します

これはあなたに役立つかもしれません。 CASE WHEN THEN ENDを使用しました PIVOTを達成するためのブロック 。

SELECT USERS.USER_NAME
  , MAX(COALESCE(TEST.USER1, 0)) USER1
  , MAX(COALESCE(TEST.USER2, 0)) USER2
  , MAX(COALESCE(TEST.USER3, 0)) USER3
  , MAX(COALESCE(TEST.USER7, 0)) USER7
FROM (
  SELECT DISTINCT USER_NAME 
  FROM (
      SELECT USER_NAME FROM TEST
      UNION ALL
      SELECT M_USER FROM TEST
    )
  ) USERS
    LEFT OUTER JOIN (
      SELECT
          USER_NAME
          , M_USER
          , CASE WHEN M_USER = 'user 1' THEN TOTAL ELSE 0 END AS USER1
          , CASE WHEN M_USER = 'user 2' THEN TOTAL ELSE 0 END AS USER2
          , CASE WHEN M_USER = 'user 3' THEN TOTAL ELSE 0 END AS USER3
          , CASE WHEN M_USER = 'user 7' THEN TOTAL ELSE 0 END AS USER7
      FROM TEST
    ) TEST ON USERS.USER_NAME = TEST.USER_NAME
GROUP BY USERS.USER_NAME
ORDER BY USERS.USER_NAME

更新

単一のクエリでこれを書く方法を見つけることができませんでした。分析の結果、これ が見つかりました。 。

CREATE OR REPLACE FUNCTION GETUSERS RETURN SYS_REFCURSOR AS
  QUERY VARCHAR2(32767);
  RC SYS_REFCURSOR;
BEGIN

  QUERY := 'SELECT USERS.USER_NAME ';

  FOR TMP IN (SELECT DISTINCT UPPER(REPLACE(USER_NAME, ' ', '')) USER_NAME FROM (SELECT USER_NAME FROM TEST UNION ALL SELECT M_USER FROM TEST) ORDER BY USER_NAME)
  LOOP
    QUERY := QUERY || '  , MAX(COALESCE(TEST.' || TMP.USER_NAME || ' , 0)) ' || TMP.USER_NAME;
  END LOOP;

  QUERY := QUERY || ' FROM ( ';
  QUERY := QUERY || '  SELECT DISTINCT USER_NAME ';
  QUERY := QUERY || '  FROM ( ';
  QUERY := QUERY || '      SELECT USER_NAME FROM TEST ';
  QUERY := QUERY || '      UNION ALL ';
  QUERY := QUERY || '      SELECT M_USER FROM TEST ';
  QUERY := QUERY || '    ) ';
  QUERY := QUERY || '  ) USERS ';
  QUERY := QUERY || '    LEFT OUTER JOIN ( ';

  QUERY := QUERY || ' SELECT USER_NAME';
  FOR TMP IN (SELECT DISTINCT USER_NAME, REPLACE(USER_NAME, ' ', '') USER_COL_NM FROM (SELECT USER_NAME FROM TEST UNION ALL SELECT M_USER FROM TEST))
  LOOP
    QUERY := QUERY || ', CASE WHEN M_USER = ''' || TMP.USER_NAME
      || ''' THEN TOTAL ELSE 0 END AS ' || TMP.USER_COL_NM ;
  END LOOP;
  QUERY := QUERY || ' FROM TEST';

  QUERY := QUERY || '    ) TEST ON USERS.USER_NAME = TEST.USER_NAME ';
  QUERY := QUERY || 'GROUP BY USERS.USER_NAME ';
  QUERY := QUERY || 'ORDER BY USERS.USER_NAME';

  OPEN RC FOR QUERY;

  RETURN RC;
END;
/

SQLを動的に作成する作成された関数 SYS_REFCURSORを返します 。これは、SQL *PlusまたはSQLDeveloper（「スクリプトとして実行」を使用）で実行できます。

VAR RC REFCURSOR;
EXEC :RC := GETUSERS;
PRINT RC