我必须修改块以使用光标读取和显示我的数据库中已保存的购物者 26 购物篮的信息

Question

DECLARE
lv_basket_num NUMBER (3);
lv_created_date DATE;
lv_qty_num NUMBER(2);
lv_sub_num NUMBER(5,2);
lv_days_num NUMBER(3);
lv_shopper_num NUMBER(3) := 26;

BEGIN
SELECT idBasket, dtcreated, quantity, subtotal
INTO lv_basket_num, lv_created_date, lv_qty_num, lv_sub_num
FROM BB_BASKET
WHERE idShopper = lv_shopper_num
AND orderplaced= 0;

lv_days_num := SYSDATE-lv_created_date;
DBMS_OUTPUT.PUT_LINE(lv_basket_num||'*'||lv_created_date||'*'||lv_qty_num||'*'||lv_sub_num||'*'||lv_days_num);

END;

Answer 1

很容易"convert"将SELECT变成游标：

cursor cur_r is select ... <your query goes here>;

然后你必须声明一个游标变量（它将保存游标返回的结果）（而不是你现在声明的一堆变量），打开游标，从中获取，注意退出循环，关闭光标。太多的操作，那么 - 为什么不让 Oracle 为您做这些呢？切换到游标 FOR 循环。

方法如下：

DECLARE
  lv_shopper_num NUMBER(3) := 26;
BEGIN
  for cur_r in (SELECT idBasket, dtcreated, quantity, subtotal,
                       sysdate - dtcreated as lv_days_num
                FROM BB_BASKET
                WHERE idShopper = lv_shopper_num
                  AND orderplaced = 0
               )
  loop               
    DBMS_OUTPUT.PUT_LINE(cur_r.idBasket ||'*'|| cur_r.dtcreated ||'*'|| 
                         cur_r.quantity ||'*'|| cur_r.subtotal  ||'*'|| lv_days_num);
  end loop;
END;

我必须修改块以使用光标读取和显示我的数据库中已保存的购物者 26 购物篮的信息

I have to modify the block to use a cursor to read and display the information for the saved baskets of shopper 26 in my database

oracle

oracle10g

oracle-sqldeveloper