如果行存在，则更新MySQL，否则插入

Question

INSERT INTO GameScoreTotal (
    `GameName`
    , `OverallScore`
    , `GraphicsScore`
    , `StoryScore`
    , `GameplayScore`
    , `TimeScore`
    )
VALUES (
    'HomeFront'
    , '1'
    , '1'
    , '1'
    , '1'
    , '5'
    )
WHERE GameName = 'HomeFront'
    ON DUPLICATE KEY

UPDATE OverallScoreTotal = OverallScoreTotal + '1'
    , GraphicsTotal = GraphicsTotal + '1'
    , StoryTotal = StoryTotal + '1'
    , GameplayTotal = GameplayTotal + '1'
    , TimeTotal = TimeTotal + '1'
    , RatingCount = RatingCount + 1;

如果有数据，则更新GameScoreTotal，否则插入数据。 有什么想法吗？

- Clint

Answer 1

• 您需要在 GameName 名称上定义关键字，（最好是唯一或主键）
• 从插入语句中删除 WHERE 子句

查询：

INSERT INTO GameScoreTotal ( `GameName` , `OverallScore` , `GraphicsScore`
                           , `StoryScore` , `GameplayScore`  , `TimeScore` )
VALUES ( 'HomeFront' , 1  , 1 , 1 , 1 , 5 )
    ON DUPLICATE KEY
UPDATE OverallScoreTotal = OverallScoreTotal + 1
     , GraphicsTotal = GraphicsTotal + 1
     , StoryTotal = StoryTotal + 1
     , GameplayTotal = GameplayTotal + 1
     , TimeTotal = TimeTotal + 1
     , RatingCount = RatingCount + 1;

源代码

• INSERT ... ON DUPLICATE KEY UPDATE 语法

- John Woo

Answer 2

使用REPLACE INTO而不是INSERT INTO进行查找。

- John3136