auto-increment

相关标签：javascript jquery android 多少钱 iPhone

Error when use auto_increment in MySQL

I meet some errors when using auto_increment in MySQL. code is here: user_id bigint(20) unsigned not null auto_increment=1000[详细]

2023-02-23 05:09 分类：问答
which data type and length is suitable for the field of auto increment id in database?

Let\'s say my website will be like Facebook which has a lot of entry everyday. So the entry for the field of auto increment id in database should be a lot lot lot. Instead of INT w开发者_开发百科ithou[详细]

2023-02-22 18:51 分类：问答
Incremental number using the "Curiously Recurring Template Pattern"

I want to im开发者_JAVA技巧plement a class Address that, when created, initializes its field addr to a unique value. That value has to increment by one every time I create an Address instance.[详细]

2023-02-22 18:38 分类：问答
In Rails how would one generate a unique serial number for a new instance of a model?

In Rails, I\'m looking for a way to generate an auto-incrementing serial number for internal record keeping for new instances of a model. I would like to avoid creating database specific code and rath[详细]

2023-02-22 06:37 分类：问答
How to get the id of an inserted row ON insert?

I would like to create a unique hash of an AUTO-INCREMENT field while inserting that row. Something like:[详细]

2023-02-20 22:03 分类：问答
How do I start counting from 10000 in my primary key field in rails?

I would like to run a migration to create a User table that starts counting from 10000 for the user_id column. I would like to avoid using DB specific syntax via the execute method, because my product[详细]

2023-02-19 12:32 分类：问答
Generate ID's above a certain value

In my JPA+Hibernate+MySQL app I have an entity like so: @Entity public class Room { @Id @GeneratedValue private long id;[详细]

2023-02-18 05:28 分类：问答
Reset auto increment counter in postgres

I would like to force the auto increment field of a table to some value, I tried with this: ALTER开发者_C百科 TABLE product AUTO_INCREMENT = 1453[详细]

2023-02-17 23:56 分类：问答
MySQL duplicate ID

Could it somehow happen that MySQL generates the same autoincrement ID twice? We have the following situation:[详细]

2023-02-17 15:38 分类：问答
MySQL - autoincrement to guid

I have a table with an auto-increment ID field as shown below. +------------+-------------------------------------+[详细]

2023-02-15 06:35 分类：问答