MySQL存儲過程案例語句語法錯誤-續2

Question

以下代碼中的一個語法錯誤。 mysql的響應是

錯誤1064：您的SQL語法有錯誤； 檢查與您的MySQL服務器版本對應的手冊以獲取正確的語法，以在'300ml'，'500ml'，'1lit'，'2lit'附近使用）VALUES（m_cust_id，IN_book_id，（SELECT Rate.Can * Book） 24 SQL語句

以下是步驟。

CREATE PROCEDURE `calculate_amount` (in IN_book_id INT,  in IN_qty INT )
BEGIN
-- declare
DECLARE m_prdct VARCHAR(10);
DECLARE m_cust_id INT(5);

-- select into
SELECT 
    Product
FROM
    Bookings
WHERE
    Book_id = IN_book_id INTO m_prdct;

SELECT 
    Cust_id
FROM
    Bookings
WHERE
    Book_id = IN_book_id INTO m_cust_id;

-- conditionals & action
IF (m_prdct = '20ltr') THEN
INSERT INTO Amount (Cust_id,Book_id,Can,'300ml','500ml','1lit','2lit') VALUES(m_cust_id,IN_book_id,(SELECT Rate.Can*Bookings.Qty FROM Rate,Bookings WHERE Bookings.Book_id=IN_book_id),0,0,0,0); 

ELSEIF (m_prdct = '300ml') THEN
INSERT INTO Amount(Cust_id,Book_id,Can,'300ml','500ml','1lit','2lit') VALUES(m_cust_id,IN_book_id,0,(SELECT Rate.300ml*Bookings.Qty FROM Rate,Bookings WHERE Bookings.Book_id=IN_book_id),0,0,0);

ELSEIF (m_prdct = '500ml') THEN 
INSERT INTO Amount(Cust_id,Book_id,Can,'300ml','500ml','1lit','2lit') VALUES(m_cust_id,IN_book_id,0,0,(SELECT Rate.500ml*Bookings.Qty FROM Rate,Bookings WHERE Bookings.Book_id=IN_book_id),0,0); 

ELSEIF (m_prdct = '1ltr') THEN 
INSERT INTO Amount(Cust_id,Book_id,Can,'300ml','500ml','1lit','2lit') VALUES(m_cust_id,IN_book_id,0,0,0,(SELECT Rate.1lit*Bookings.Qty FROM Rate,Bookings WHERE Bookings.Book_id=IN_book_id),0); 

ELSE 
    INSERT INTO Amount(Cust_id,Book_id,Can,'300ml','500ml','1lit','2lit') VALUES(m_cust_id,IN_book_id,0,0,0,0,(SELECT Rate.2lit*Bookings.Qty FROM Rate,Bookings WHERE Bookings.Book_id=IN_book_id)); 
-- end
END IF;
END

Answer 1

即使腳本顯示錯誤，該腳本也成功應用。 以數字開頭的列號后退標記解決了該問題。 刷新后，它已從_SYNTAX_ERROR更改為其實際名稱。