Question

我正在尝试运行一些PL / SQL代码，但它包含一些关于标识符的错误，请帮助我。代码未运行

DECLARE
   a := customer.purchase%TYPE;
   id := &employee.empno;
BEGIN
   UPDATE employee SET salary = salary + 5000;
   UPDATE employee SET bonus = bonus + 1000 WHERE empno = &id;
   SAVEPOINT sumeet;
   UPDATE customer SET purchase = purchase + 5000 WHERE custid = a;

   SELECT SUM(purchase) INTO a;

   IF (a < 11000) THEN
      ROLLBACK sumeet;
   END IF;
   COMMIT;

END;
/

Answer 1

除了Alen的修复，而不是ROLLBACK为什么不这样做：

   UPDATE customer SET purchase = purchase + 5000 
    WHERE custid = a
      AND (select sum(purchase) from customer) + 5000 < 11000;

  COMMIT;

Answer 2

1：这是错误的：

DECLARE
  a := customer.purchase%TYPE;
  id := &employee.empno;

您没有在变量名称后添加:=，&无效，employee.empno不是有效的数据类型。即：

DECLARE
  a customer.purchase%TYPE;
  id employee.empno%TYPE;

2：您不需要&来引用id变量：

UPDATE employee SET bonus = bonus + 1000 WHERE empno = &id;

即：

UPDATE employee SET bonus = bonus + 1000 WHERE empno = id;

Answer 3

尝试使用此块，但首先更改声明块中的值（1,2）。

DECLARE
   a customer.purchase%TYPE := 1;
   id employee.empno%TYPE := 2;
BEGIN
   UPDATE employee SET salary = salary + 5000;
   UPDATE employee SET bonus = bonus + 1000 WHERE empno = id;
   SAVEPOINT sumeet;
   UPDATE customer SET purchase = purchase + 5000 WHERE custid = a;

   SELECT SUM(purchase) INTO a FROM customer;

   IF (a < 11000) THEN
      ROLLBACK sumeet;
   END IF;
   COMMIT;

END;
/

Answer 4

这里有一个提示：将员工的两个更新合并为一个。

 UPDATE employee
 SET    salary = salary + 5000,
        bonus  = bonus  + case when empno = &id then 1000 else 0 end;

此外，开始使用有意义的变量名称。

PL / SQL中带有标识符的错误

4 个答案: