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我是新來的存儲過程。我有客戶表,它有像customerid,customerName,companyName這樣的列。我正在創建新列email_address。哪個工作正常。現在我試圖使用商店程序爲每個客戶添加電子郵件地址值。我在電子郵件地址中輸入了customername和companyName。但不知何故它沒有更新。這裏是我的代碼變量聲明無法更新表中的單列值
CREATE PROCEDURE test()
BEGIN
DECLARE variable
DECLARE CURSOR FOR
SELECT CustomerID, CompanyName, ContactName, EmailAddress
FROM customers;
DECLARE EXIT HANDLER
OPEN cursor_name;
WHILE row_not_found = FALSE
DO
FETCH customers_cursor
INTO customer_id_var, company_name_var, contact_name_var, email_id_var;
SET email_part1 = REPLACE (contact_name_var, ' ', '');
SET email_part2 = substring_index(company_name_var, ' ', 1);
update customers
SET EmailAddress = CONCAT(email_part1, '@', email_part2, '.com')
WHERE CustomerID = customer_id_var;
SET update_count = update_count + 1;
END WHILE;
CLOSE cursor_name;
SELECT * FROM customers;
END//
DELIMITER ;
CALL test();