字段“id"没有默认值?_数据库问题-跟版网

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' );

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字段“id"没有默认值?

问题描述

推荐答案

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