check the trigger quantity - at hand when you insert the order quantity
JinI have problem with trigger, I use the OE schema
I have the form master / detail for orders and Order Details, that I need when I insert the order quantity to check the quantity available for each product using the trigger
I use oracle 10g developer
any help would be appreciated
Thank you very much
2MEO wrote:
Bamba says:
What is the structure of your database? and this code that you write?don't tell that you don't know how write the SQL query :)
Thank you for your quick response
I can write the SQL query
I use these lines:SELECT quantity_on_hand
INVENTORIES
WHERE Product_ID =: Product_ID;
IF: quantity > Quantity_on_hand THEN
MESSAGE ("the inventory is not enough");
END IF;Why do you think I can't write same SQL query?
Thank you Bailey
The query is bad :) there is no INTO clause
Write it on quantity WHEN-VALIDATE-ITEM and KEY-NEXT-ITEM
declare
vquantity number;
begin
SELECT quantity_on_hand
into vquantity
FROM INVENTORIES
WHERE Product_ID = :Product_ID;
IF :quantity > vquantity THEN
MESSAGE ('the inventory is not enough');
raise form_trigger_failure;
else
null; -- or next_item if you are using KEY NEXT ITEM trigger
END IF;
Exception when no_data_found then
message('Invalid product ID');
raise form_trigger_failure;
END;
Tags: Oracle Development
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