因此，我的标题状态的任务是显示用户定义的项目ID中的项目和库存信息。我必须编写一个返回Item_desc的单行select语句，然后将其显示为标题行。假设用户通过使用＆＃34;＆amp;＆＃34;输入了项目ID为2 （＆符号）变量，格式化输出如下：这适用于PLSQL btw
Item ID: 2 Item Description: 3-Season Tent
我还必须创建一个显式或隐式游标，返回并显示每个库存项目的大小，颜色，当前价格，库存数量和总价值（价格*库存数量）。到目前为止，我有这个，但我不知道如果我朝着正确的方向前进。
--CORRECT CODE IS LISTED BELOW WITH NEXT PROBLEM
更新!!：好的，我把代码工作但是下一部分，我要创造一个变量，计算所有清单项目的总价值，然后在所有行进行处理后再显示....应该看起来像这样：
TOTAL VALUE: --WHATEVER TOTAL VALUE ITS SUPPOSED TO BE FOR THE PARTICULAR ITEM
我真的很开心，但这还不能正确计算...
declare
item_descript item.item_desc%type;
iItem_id item.item_id%type;
inItemid inventory.item_id%type;
invcolor inventory.color%type;
invsize inventory.inv_size%type;
invprice inventory.inv_price%type;
invqoh inventory.inv_qoh%type;
value number;
newval number;
totalval number;
cursor c1 IS
SELECT item.item_id, item.item_desc, inventory.item_id, inventory.color, inventory.inv_size, inventory.inv_price, inventory.inv_qoh
from item join inventory on item.item_id=inventory.item_id
where item.item_id=&item_id;
begin
open c1;
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
--exit when c1%notfound;
DBMS_OUTPUT.PUT_LINE('Item ID: '||iItem_id||' Item Description: '||item_descript);
close c1;
open c1;
loop
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
exit when c1%notfound;
value := (invprice*invqoh);
newval := value; -- THIS IS WHERE I'M NOT SURE AS HOW TO CALCULATE FOR TOTAL VALUE???
totalval := value + newval; --NOT SURE ?????
DBMS_OUTPUT.PUT_LINE('================');
DBMS_OUTPUT.PUT_LINE('Size: '||invsize);
DBMS_OUTPUT.PUT_LINE('Color: '||invcolor);
DBMS_OUTPUT.PUT_LINE('Price: '||invprice);
DBMS_OUTPUT.PUT_LINE('QOH: '||invqoh);
DBMS_OUTPUT.PUT_LINE('Value: '||value);
end loop;
DBMS_OUTPUT.PUT_LINE('TOTAL VALUE: '||totalval); --THIS OUTPUT SHOULD BE CORRECT IF ONLY IT WOULD CALCULATE CORRECTLY
close c1;
commit;
end;
/
答案 0 :(得分：0)
Hi I think the problem is with the select query in the cursor. Please try this and let me know for any issues.
DECLARE
item_descript item.item_desc%type;
iItem_id item.item_id%type;
inItemid inventory.item_id%type;
invcolor inventory.color%type;
invsize inventory.inv_size%type;
invprice inventory.inv_price%type;
invqoh inventory.inv_qoh%type;
value NUMBER;
CURSOR c1
IS
SELECT item.item_id,
item.item_desc,
inventory.item_id,
inventory.color,
inventory.inv_size,
inventory.inv_price,
inventory.inv_qoh
FROM item,
inventory
WHERE item.item_id=inventory.item_id
AND item_id =
&item_id;
BEGIN
OPEN c1;
LOOP
FETCH c1
INTO iItem_id,
item_descript,
inItemid,
invcolor,
invsize,
invprice,
invqoh;
EXIT
WHEN c1%notfound;
IF iItem_id=inItemid THEN
value :=(invprice*invqoh);
SELECT item_desc
INTO item_descript
FROM item
,inventory
WHERE item.item_id =inventory.item_id
AND item.item_id =iItem_id
AND inventory.item_id=inItemid;
END IF;
END LOOP;
DBMS_OUTPUT.PUT_LINE('Item ID: '||iItem_id||'Item Description: '||item_descript);
DBMS_OUTPUT.PUT_LINE('================');
DBMS_OUTPUT.PUT_LINE('Size: '||invsize);
DMBS_OUTPUT.PUT_LINE('Color: '||invcolor);
DBMS_OUTPUT.PUT_LINE('Price: '||invprice);
DBMS_OUTPUT.PUT_LINE('QOH: '||invqoh);
DBMS_OUTPUT.PUT_LINE('Value: '||value);
END;
答案 1 :(得分：0)
declare
item_descript item.item_desc%type;
iItem_id item.item_id%type;
inItemid inventory.item_id%type;
inv color inventory.color%type;
invsize inventory.inv_size%type;
invprice inventory.inv_price%type;
invqoh inventory.inv_qoh%type;
value number;
--totalval number;
cursor c1 IS
SELECT item.item_id, item.item_desc, inventory.item_id, inventory.color, inventory.inv_size, inventory.inv_price, inventory.inv_qoh
from item join inventory on item.item_id=inventory.item_id
where item.item_id=&item_id;
begin
open c1;
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
--exit when c1%notfound;
DBMS_OUTPUT.PUT_LINE('Item ID: '||iItem_id||'Item Description: '||item_descript);
close c1;
open c1;
loop
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
exit when c1%notfound;
value := (invprice*invqoh);
DBMS_OUTPUT.PUT_LINE('================');
DBMS_OUTPUT.PUT_LINE('Size: '||invsize);
DBMS_OUTPUT.PUT_LINE('Color: '||invcolor);
DBMS_OUTPUT.PUT_LINE('Price: '||invprice);
DBMS_OUTPUT.PUT_LINE('QOH: '||invqoh);
DBMS_OUTPUT.PUT_LINE('Value: '||value);
end loop;
close c1;
commit;
end;
/
答案 2 :(得分：0)
hey can you try this and let me know for any issues.Thanks
declare
item_descript item.item_desc%type;
iItem_id item.item_id%type;
inItemid inventory.item_id%type;
invcolor inventory.color%type;
invsize inventory.inv_size%type;
invprice inventory.inv_price%type;
invqoh inventory.inv_qoh%type;
value number;
newval number;
totalval number;
cursor c1 IS
SELECT item.item_id, item.item_desc, inventory.item_id, inventory.color, inventory.inv_size, inventory.inv_price, inventory.inv_qoh
from item join inventory on item.item_id=inventory.item_id
where item.item_id=&item_id;
begin
open c1;
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
--exit when c1%notfound;
DBMS_OUTPUT.PUT_LINE('Item ID: '||iItem_id||' Item Description: '||item_descript);
close c1;
open c1;
loop
fetch c1 into iItem_id, item_descript, inItemid, invcolor, invsize, invprice, invqoh;
exit when c1%notfound;
totalval := totalval + (invprice*invqoh);
value:= (invprice*invqoh);
-- newval := value; -- THIS IS WHERE I'M NOT SURE AS HOW TO CALCULATE FOR TOTAL VALUE???
--totalval := value + newval; --NOT SURE ?????
DBMS_OUTPUT.PUT_LINE('================');
DBMS_OUTPUT.PUT_LINE('Size: '||invsize);
DBMS_OUTPUT.PUT_LINE('Color: '||invcolor);
DBMS_OUTPUT.PUT_LINE('Price: '||invprice);
DBMS_OUTPUT.PUT_LINE('QOH: '||invqoh);
DBMS_OUTPUT.PUT_LINE('Value: '||value);
end loop;
DBMS_OUTPUT.PUT_LINE('TOTAL VALUE: '||totalval); --THIS OUTPUT SHOULD BE CORRECT IF ONLY IT WOULD CALCULATE CORRECTLY
close c1;
commit;
end;