mysql - **当我执行此过程时，出现错误 1064**

Question

CREATE DEFINER=`root`@`localhost` PROCEDURE `GetStateList`(IN _CountryName VARCHAR(255))
BEGIN
    DECLARE @CCode VARCHAR(50)
SET @CCode = (SELECT CountryID  from countrylist where CountryName = _CountryName);
  SELECT @CCode;

END

Answer 1

您需要将分隔符重新定义为 ; 之外的其他内容(例如:$$)。最后，将限制器重置回 ;。此外，Declare 语句中缺少一个分号:

DELIMITER $$

CREATE DEFINER=`root`@`localhost` PROCEDURE `GetStateList`(IN _CountryName VARCHAR(255))

BEGIN
    DECLARE @CCode VARCHAR(50); -- semicolon was missing here
    SET @CCode = (SELECT CountryID  
                  from countrylist 
                  where CountryName = _CountryName);

    SELECT @CCode;

END$$

DELIMITER ;