Question

问题是要求匿名的PL / SQL块：声明一个变量，用于计算Products表中的所有产品有一个if-else语句取决于count是＆gt; =还是＆lt; 7个

到目前为止我的尝试：

SET SERVEROUTPUT ON;
DECLARE
  number_of_products NUMBER;
BEGIN
  SELECT SUM(product_id)
  INTO number_of_products
  FROM products
  IF number_of_products >= 7 THEN --Syntax error on this line, not sure why
    DBMS_OUTPUT.PUT_LINE('The number of products is greater than or equal to 7');
  ELSE
    DBMS_OUTPUT.PUT_LINE('The number of products is less than 7');
  END IF;
EXCEPTION
  WHEN OTHERS THEN
    DBMS_OUTPUT.PUT_LINE('An error occurred');
END;

错误消息：
PL / SQL：ORA-00933：SQL命令未正确结束
ORA-06550：第4行，第3栏：
PL / SQL：忽略SQL语句
ORA-06550：第9行，第3栏：
PLS-00103：当遇到以下情况之一时遇到符号“ELSE”：    （如果循环mod，则开始为goto声明结束异常退出    null pragma raise返回选择更新时使用     ORA-06550：第12行第1列：
PLS-00103：遇到符号“EXCEPTION”
06550。 00000 - “行％s，列％s：\ n％s”

我错过了什么？

Answer 1

SET SERVEROUTPUT ON;
DECLARE
  number_of_products NUMBER;
BEGIN
  SELECT SUM(product_id)
  INTO number_of_products
  FROM products;
  IF number_of_products >= 7 THEN --Syntax error on this line, not sure why
    DBMS_OUTPUT.PUT_LINE('The number of products is greater than or equal to 7');
  ELSE
    DBMS_OUTPUT.PUT_LINE('The number of products is less than 7');
  END IF;
EXCEPTION
  WHEN OTHERS THEN
    DBMS_OUTPUT.PUT_LINE('An error occurred');
END;

执行匿名PL / SQL块

1 个答案: