I开发者_运维技巧 am trying to make a column in a mysql database that auto increments by one but goes from 0-Z and then rolls.
Why should I choose UUID over an auto increment number for my entity\'s primary 开发者_JAVA百科key? What are the pros and cons?Andrey and Mjg both had good points, but I would add a related performanc
I need to merge parallel tables from 2 different schemas. They are practically the same (some fields are different), but the IDs (their PKs) are different.
I would like to convert some of our MyISAM tables to InnoDB so I can take advantage of foreign key support.However, most of the tables use a two-column (composite) primary key design in which one of t
How do I add auto_inc开发者_StackOverflow中文版rement to an existing column of a MySQL table?I think you want to MODIFY the column as described for the ALTER TABLE command. It might be something like
I\'m using C# 2010 Express. I have created a SQL Server CE database file (.sdf) then created Information table and ID, Name, City columns with Database Explorer. I want to save names and city user wi
How do I set the au开发者_如何学JAVAto_increment column in such a way that it increments by 10 for each record insert.
I\'ve found a problem with Hibernate and composite key with one of its column auto incremented. I\'m using MySQL and primary key composed of 2 columns, GID and LANG. GID column is set as AUTO_INCREME
I cant use auto increment in phpmyadmin for this but I would like to see if its possible and find a way to get the max(displayorder) +1 every time there\'s a row insert. Could someone sh开发者_JAVA技巧
I am using MySQL in a rails application. I have a users table (standard stuff like id, name etc) and a books table (again with id, user_id and title etc).
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