Oracleのコレクションを使用できます。 CAST()
COLLECT()
とペアになっています 値をユーザー定義のコレクションに集約してから、SET()
重複を取り除きます。次に、LISTAGG()
を使用できます コレクションを文字列に変換します。
Oracleセットアップ :
CREATE TYPE intlist IS TABLE OF INT;
/
CREATE TYPE stringlist IS TABLE OF VARCHAR2(4000);
/
CREATE TABLE table_name ( ColA NUMBER(5,0), ColB VARCHAR2(20) );
INSERT INTO table_name
SELECT 1, 'POW' FROM DUAL UNION ALL
SELECT 2, 'POW' FROM DUAL UNION ALL
SELECT 1, 'POWPRO' FROM DUAL UNION ALL
SELECT 1, 'PRO' FROM DUAL UNION ALL
SELECT 2, 'PRO' FROM DUAL UNION ALL
SELECT 1, 'PROUTL' FROM DUAL UNION ALL
SELECT 1, 'TNEUTL' FROM DUAL UNION ALL
SELECT 1, 'UTL' FROM DUAL UNION ALL
SELECT 1, 'UTLTNE' FROM DUAL;
クエリ :
SELECT ( SELECT LISTAGG( COLUMN_VALUE, ',' )
WITHIN GROUP ( ORDER BY COLUMN_VALUE )
FROM TABLE( ColA ) ) AS ColA,
( SELECT LISTAGG( COLUMN_VALUE, ',' )
WITHIN GROUP ( ORDER BY COLUMN_VALUE )
FROM TABLE( ColB ) ) AS ColB
FROM (
SELECT SET( CAST( COLLECT( ColA ORDER BY ColA ) AS INTLIST ) ) ColA,
SET( CAST( COLLECT( ColB ORDER BY ColB ) AS STRINGLIST ) ) ColB
FROM table_name
);
出力 :
ColA ColB
---- ---------------------------------------
1,2 POW,POWPRO,PRO,PROUTL,TNEUTL,UTL,UTLTNE