回答編集履歴
1
前提が違ったので
test
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@@ -1,23 +1,30 @@
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これでよさそうですね。
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```SQL
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DECLARE
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CURSOR ASD IS
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SELECT A FROM D_TABLE WHERE A IS NOT NULL
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UNION
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SELECT B FROM D_TABLE WHERE B IS NOT NULL
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UNION
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SELECT C FROM D_TABLE WHERE C IS NOT NULL;
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TYPE
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TYPE EXISTS_TYPE IS TABLE OF BOOLEAN INDEX BY D_TABLE.A%TYPE;
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EXISTS_TBL EXISTS_TYPE;
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TYPE HAIRETU_TYPE IS TABLE OF D_TABLE.A%TYPE INDEX BY BINARY_INTEGER;
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HAIRETU HAIRETU_T
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HAIRETU HAIRETU_TYPE;
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PROCEDURE MAIN_LOOP(ITEM D_TABLE.A%TYPE)
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IS
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BEGIN
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IF ITEM IS NOT NULL THEN
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IF NOT EXISTS_TBL.EXISTS(ITEM) THEN
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EXISTS_TBL(ITEM) := TRUE;
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HAIRETU(HAIRETU.COUNT + 1) := ITEM;
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-
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END IF;
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END IF;
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END;
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BEGIN
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FET
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FOR R IN (SELECT A, B, C FROM D_TABLE)
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LOOP
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MAIN_LOOP(R.A);
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MAIN_LOOP(R.B);
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MAIN_LOOP(R.C);
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-
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END LOOP;
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FOR i IN 1..HAIRETU.COUNT
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LOOP
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DBMS_OUTPUT.PUT_LINE(HAIRETU(i));
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END LOOP;
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END;
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```
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・UNION で重複は削除されます。
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23
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-
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30
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格納してから削除ではなく、存在していなかったら追加という風にしてみました。
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