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我正在嘗試在庫數據庫上創建一個存儲過程,主要用於練習。無法讓MySQL查詢工作
但它讓我感到困惑。我使用這個查詢來創建過程,並且它說它正在工作,但是當我然後調用過程時,它說這個過程不存在。注意:我在不在本地主機上的Web數據庫上使用phpmyadmin。
delimiter $$
create procedure BorrowBook(in theBookID, in theUserID)
begin
declare lim int;
declare num int;
declare loanNumber int;
declare copyNumber int;
set lim = (select Readers.Limit from Readers where Readers.id = theUserID);
set num = (select Count(*) from Loans where Loans.UserID = theUserID);
set loanNumber = (select Count(*) from Loans) + 1;
set copyNumber = (select NumberAvailable from Book where Book.id = theBookID);
if(copyNumber > 0)
if(num<lim)
then
--Add a Loan to the Loans Table
insert into Loans values(loanNumber, theBookId, theUserID, curDate(), 0);
commit;
update Book set Book.NumberAvailable = Book.NumberAvailable - 1 where Book.id = theBookID;
select 'Succesful Update';
else
rollback;
select 'Borrow limit reached';
end if;
else
rollback;
select 'No copies available';
end;
delimiter ;
現在談到了這一點錯誤:#1064 - 你有一個您的SQL語法錯誤;檢查與您的MySQL服務器版本相對應的手冊,以便在'用戶ID'附近使用正確的語法)begin declare lim int; declare num int;在第1行申報貸款號碼 除此之外的代碼中是否還有實際的錯誤可以看到? – 2012-04-02 12:57:37
嘗試指定像'inUserID INT'這樣的參數的類型。 – 2012-04-02 13:28:22