我有 3 个输入参数,根据每个输入参数的值,我必须动态准备 SQL 过程。我正在按照以下方式进行操作,但它失败了,如果参数值为空,那么我必须从 where 子句中排除它。
输入参数:
varchar2 中的 empid || empname IN varchar2 || empsal IN varchar2
SELECT
EMP_NAME
INTO
V_EMP_NAME
FROM
EMPLOYEE
WHERE
( EMP_ID = EMPID
OR ( EMP_ID IS NULL
AND EMPID IS NULL ) )
AND ( EMP_NAME = EMPNAME
OR ( EMP_NAME IS NULL
AND EMPNAME IS NULL ) )
AND ( EMP_SAL = EMPSAL
OR ( EMP_SAL IS NULL
AND EMPSAL IS NULL ) );
更新后,我修改了如下查询,它已编译但运行时错误提示 ORA-00933: SQL command not properly end on just before EXECUTE IMMEDIATE
V_SQL :='SELECT EMP_NAME INTO V_empname FROM employee WHERE ';
BEGIN
IF(EMPID IS NOT NULL) THEN
V_SQL := V_SQL || ' emp_id='||EMPID;
END IF;
IF(EMPNAME IS NOT NULL) THEN
V_SQL := V_SQL || ' AND emp_name='||EMPNAME;
END IF;
IF(V_empsalIS NOT NULL) THEN
V_SQL := V_SQL || ' AND emp_sal='||empsal;
V_SQL := V_SQL ||' AND ACTIVE =''Y''' ;
END IF;
EXECUTE IMMEDIATE V_SQL;
EXCEPTION
WHEN NO_DATA_FOUND THEN
V_check:= '' ;
END;