Question

我是MySql的新手。我创建了一个程序：

DELIMITER $$

CREATE PROCEDURE `sampledb`.`InsertSample`
(
    IN aName VARCHAR(20),
    IN aVersion VARCHAR(10),
    IN pName VARCHAR(50),
    OUT InsertStatus VARCHAR(30)
)
BEGIN
IF NOT EXISTS(SELECT st.AName FROM sampletable st WHERE st.AName = aName)
    INSERT INTO sampletable(AName, AVersion, PName) 
    VALUES(aName, aVersion, pName)
    SET InsertStatus = 'Success'
ELSE
    SET InsertStatus = 'Already exists!'
END IF
END$$

DELIMITER $$;

我尝试了其他方式插入：

 INSERT INTO sampletable (aName, aVersion, pName)

这两次，我都收到了这个错误：

Error Code : 1064
You have an error in your SQL syntax; check the manual that 
corresponds to your MySQL server version for the right syntax ..

我正在使用MySql 5.0.51b-community-nt

Answer 1

您的代码缺少分号（;）。

更改

BEGIN
IF NOT EXISTS(SELECT st.AName FROM sampletable st WHERE st.AName = aName) THEN
    INSERT INTO sampletable(AName, AVersion, PName) 
    VALUES(aName, aVersion, pName)
    SET InsertStatus = 'Success'
ELSE
    SET InsertStatus = 'Already exists!'
END IF
END$$

DELIMITER $$;

要

BEGIN
IF NOT EXISTS( SELECT st.AName FROM sampletable st WHERE st.AName = aName ) THEN
    INSERT INTO sampletable( AName, AVersion, PName ) 
    VALUES( aName, aVersion, pName );
    SET InsertStatus = 'Success';
ELSE
    SET InsertStatus = 'Already exists!';
END IF;
END;
$$

DELIMITER ;

它应该有效。

Answer 2

试试这个：

DELIMITER $$

CREATE PROCEDURE `sampledb`.`InsertSample`
(
    IN aName VARCHAR(20),
    IN aVersion VARCHAR(10),
    IN pName VARCHAR(50),
    OUT InsertStatus VARCHAR(30)
)
BEGIN

IF NOT EXISTS(SELECT st.AName FROM sampletable st WHERE st.AName = aName) THEN
    INSERT INTO sampletable(AName, AVersion, PName) VALUES(aName, aVersion, pName);
    SET InsertStatus = 'Success';
ELSE SET InsertStatus = 'Already exists!';

END IF;

END$$

DELIMITER $$;

您需要确保标记每一行的结尾，并且在语句中缺少THEN子句

插入时出现Mysql错误1064

2 个答案: