用動態sql生成cursor

有個學生提問

G3 2015-01-15 13:23:27
for list_init in (select PROV_CODE,PROV_NAME from province)
  loop
    insert into T_BUSI_MONTH_REPORT (PROV_CODE, PROV_NAME, BUSI_MONTH, BUSI_DAY, BUSI_TYPE, INSERTTIME) 
      values (list_init.PROV_CODE, list_init.PROV_NAME, busiMonth, busiDay, 'RING', sysdate);
  end loop;
  commit;


from province如果是個變量，如何寫呢？

這種需求比較簡單，使用動態sql就可以了

DECLARE
  v_str    VARCHAR2(1000);
  cur_dept SYS_REFCURSOR;
  v_dname  VARCHAR2(100);
BEGIN
  v_str := 'select dname from ' || 'dept';
  OPEN cur_dept FOR v_str;
  LOOP
    FETCH cur_dept
      INTO v_dname;
    EXIT WHEN cur_dept%NOTFOUND;
    dbms_output.put_line(v_dname);
  END LOOP;
END;

執行效果如下：

SQL> SET serveroutput ON
SQL> DECLARE
  2    v_str    VARCHAR2(1000);
  3    cur_dept SYS_REFCURSOR;
  4    v_dname  VARCHAR2(100);
  5  BEGIN
  6    v_str := 'select dname from ' || 'dept';
  7    OPEN cur_dept FOR v_str;
  8    LOOP
  9      FETCH cur_dept
 10        INTO v_dname;
 11      EXIT WHEN cur_dept%NOTFOUND;
 12      dbms_output.put_line(v_dname);
 13    END LOOP;
 14  END;
 15  /
ACCOUNTING
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PL/SQL procedure successfully completed

SQL>