語法錯誤@鑄造new.value

Question

有任何問題：

DELIMITER ;; 
CREATE TRIGGER `UPD_after_financialStatus` AFTER UPDATE ON `financialStatus` 
FOR EACH ROW 
BEGIN 
DECLARE `@grossAmountTillNow` varchar(100); 
SET @grossAmountTillNow = CONCAT(
    CAST(OLD.grossAmountTillNow AS varchar(50)), 
    "---", 
    CAST(NEW.grossAmountTillNow AS varchar(50))); 
... 

它說Syntax error near 'varchar(50)),"---",CAST(NEW.grossAmountTillNow AS varchar(50))); SET @grossAmoun' at line 4。
你能幫忙嗎？

Answer 1

請比較：

SELECT CAST(CURRENT_TIMESTAMP AS VARCHAR(50)) 

您的SQL語法錯誤;檢查對應於你的MySQL服務器版本正確的語法在1號線

SELECT CAST(CURRENT_TIMESTAMP AS CHAR(50)) 

2012-04-10 12時30分二十九秒

附近 'VARCHAR（50））' 使用手冊

允許的值在Cast Functions and Operators解釋。