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        字段“id"没有默认值?

        时间:2023-06-26
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                  本文介绍了字段“id"没有默认值?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我是这个 SQL 的新手;我在更大的程序中看到过类似的问题,目前我无法理解.我正在为我的主页中使用的纸牌游戏制作一个数据库.

                  I am new to this SQL; I have seen similar question with much bigger programs, which I can't understand at the moment. I am making a database for games of cards to use in my homepage.

                  我在 Windows 上使用 MySQL Workbench.我得到的错误是:

                  I am using MySQL Workbench on Windows. The error I get is:

                  错误代码:1364.字段id"没有默认值

                  Error Code: 1364. Field 'id' doesn't have a default value

                  CREATE TABLE card_games
                  (
                  nafnleiks varchar(50), 
                  leiklysing varchar(3000), 
                  prentadi varchar(1500), 
                  notkunarheimildir varchar(1000), 
                  upplysingar varchar(1000), 
                  ymislegt varchar(500), 
                  id int(11) PK
                  );
                  
                  insert into card_games (nafnleiks, leiklysing, prentadi, notkunarheimildir, upplysingar, ymislegt)
                  
                  values('Svartipétur',
                  'Leiklsingu vantar',
                  'Er prenta í: órarinn Gumundsson (2010). Spilabókin - Allir helstu spilaleikir og spil.',
                  'Heimildir um notkun: rni Sigursson (1951). Hátíir og skemmtanir fyrir hundra árum',
                  'Arar upplsingar',
                  'ekkert hér sem stendur'
                  );
                  
                  values('Handkurra',
                  'Leiklsingu vantar',
                  'Er prenta í: órarinn Gumundsson (2010). Spilabókin - Allir helstu spilaleikir og spil.',
                  'Heimildir um notkun', 
                  'Arar upplsingar',
                  'ekkert her sem stendur'
                  );
                  
                  values('Veiimaur',
                  'Leiklsingu vantar',
                  'órarinn Gumundsson (2010). Spilabókin - Allir helstu spilaleikir og spil. Reykjavík: Bókafélagi. Bls. 19-20.',
                  'vantar',
                  'vantar',
                  'vantar'
                  );
                  

                  推荐答案

                  由于 id 是主键,所以不同的行不能有相同的值.尝试更改您的表格,以便 id 自动递增:

                  As id is the primary key, you cannot have different rows with the same value. Try to change your table so that the id is auto incremented:

                  id int NOT NULL AUTO_INCREMENT
                  

                  然后设置主键如下:

                  PRIMARY KEY (id)
                  

                  一起:

                  CREATE TABLE card_games (
                     id int(11) NOT NULL AUTO_INCREMENT,
                     nafnleiks varchar(50),
                     leiklysing varchar(3000), 
                     prentadi varchar(1500), 
                     notkunarheimildir varchar(1000),
                     upplysingar varchar(1000),
                     ymislegt varchar(500),
                     PRIMARY KEY (id));
                  

                  否则,您可以在每次插入时指定id,注意每次设置不同的值:

                  Otherwise, you can indicate the id in every insertion, taking care to set a different value every time:

                  insert into card_games (id, nafnleiks, leiklysing, prentadi, notkunarheimildir, upplysingar, ymislegt)
                  
                  values(1, 'Svartipétur', 'Leiklsingu vantar', 'Er prenta í: órarinn Gumundsson (2010). Spilabókin - Allir helstu spilaleikir og spil.', 'Heimildir um notkun: rni Sigursson (1951). Hátíir og skemmtanir fyrir hundra árum', 'Arar upplsingar', 'ekkert hér sem stendur' );
                  

                  这篇关于字段“id"没有默认值?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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