问题描述
我想在一个mysql数据库中创建一个列,自动从1增加,但从0-Z,然后滚动。
I am trying to make a column in a mysql database that auto increments by one but goes from 0-Z and then rolls.
例如
...,009,00A,00B,...,00Z,010,...,0ZZ,...,100。
For example000, 001, 002, ..., 009, 00A, 00B, ..., 00Z, 010, ..., 0ZZ, ..., 100.
我想让数据库通过自动递增字段创建列。
I would like to have the database create the column through an auto incrementing field.
我的想法是:
- 为从0-36开始的每个字符创建一列,然后自动增加行N(其中N是最低有效数字)。然后在每列上添加一个触发器以添加1
- 创建一个包含36行的表,其中每行包含一个字符0-Z,并使用类似的进位逻辑从表中拉出相应的字符上面
- 创建存储过程以从第1项执行相应的逻辑
- 让实际程序生成一个值并将其插入表
- 有一个常规的自动递增值,并计算序列中的下一个值(这是最不理想的,因为它使得难以由只在数据库中查看的人进行解析)
- Create a column for each character that goes from 0-36, then auto increment row N (where N is the least significant digit) by 1. Then add a trigger on each column to add 1 to column N-1 when column N reaches 36.
- Create a table with 36 rows where each row contains a character 0-Z and pull the appropriate character from the table with similar carry logic from the above
- Create a stored procedure to do the appropriate logic from item 1
- Have the actual program generate a value and insert it into the table
- have a regular auto incrementing value and calculate the next value in the sequence (this is the least optimal as it makes it difficult to parse by a person just looking in the database)
我希望有一个优雅的东西,这将允许像一个内置的机制,这样做,我只是不知道。我不知道存储过程/触发器,所以帮助它将非常感谢。我认为最简单的方法是有一个字符的查找表,当到达行36时,它被重置为0,然后进入行N-1。
I was hoping that there was something elegant which would allow for this like a built in mechanism to do this that I just do not know. I have no knowledge on stored procedures / triggers so help with it would be greatly appreciated. I think the easiest way would be to have a lookup table for the characters and when row 36 is reached it is reset to 0 and then there is a carry to row N-1.
推荐答案
根据您的意见,我的建议是执行以下操作:
Based on your comments, my recommendation is to do the following:
使用常规整数auto_increment列作为主键,然后有一个类型为varchar的列或一个*文本类型(取决于您的mysql服务器版本和数据存储要求),以存储客户使用的标识符。
Use a regular integer auto_increment column as the primary key for the row, and then have a column of type varchar or one of the *text types (depending on your mysql server version and data storage requirements) to store your "identifier" that the customer uses.
标识符可以使用触发器自动生成。
The identifier can be auto-generated using a trigger.
如果你打算根据标识符进行查找用户输入标识符以跳转到一个记录),您将需要该列上的索引。
If you're going to do lookups based on the identifier (i.e. perhaps the user enters an identifier to "jump to" a record) you will want an index on that column.
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