PL/SQL - dbms 输出立即执行的结果

Posted 2023-03-28

【中文标题】PL/SQL - dbms 输出立即执行的结果

【英文标题】：PL/SQL - dbms output the result of an execute immediate

【发布时间】：2011-05-29 07:38:05

【问题描述】：

我希望能够打印出查询的所有结果（应由 TableA 中的 PK 过滤）并为 TABLEA 中的每个 PK 执行此操作。 这是我到目前为止所拥有的：

 DECLARE
    CURSOR Curs IS SELECT DISTINCT PKID FROM TABLEA;
    BEGIN
    FOR rec IN Curs 
          LOOP
              EXECUTE IMMEDIATE 
              'SELECT * FROM (
              SELECT cola,
              FKTABLEA,
              colc,
              lag (cold,1) OVER (ORDER BY cold) AS cold
              FROM tableB
              WHERE FKTABLEA = :1)
              WHERE colc != cold
              order by cola' using Curs.PKID;

              DBMS_OUTPUT.PUT_LINE('OUTPUT ALL RESULTS FROM THE QUERY HERE');
          END LOOP;     
    END;

【参考方案1】：

无需使用 EXECUTE IMMEDIATE。而且只有完全手动的方式来打印所有结果：

DECLARE
    CURSOR Curs IS SELECT DISTINCT PKID FROM TABLEA;
BEGIN
    FOR rec IN Curs LOOP
        FOR r IN (
            SELECT * FROM (
                SELECT cola,
                    FKTABLEA,
                    colc,
                    lag (cold,1) OVER (ORDER BY cold) AS cold
                FROM tableB
                WHERE FKTABLEA = rec.PKID)
            WHERE colc != cold
            order by cola )
        LOOP
            DBMS_OUTPUT.PUT_LINE(r.cola || ',' || r.colb || ',' || r.colc || ',' || r.cold);
        END LOOP;
    END LOOP;     
END;