how to give varchar as primary key in mysql

Question

0.00/5 (No votes)

See more:

I have table ordertable{customer_id,oid,order_quantity,Order_amount,date}

in this table i want generate oid as(o1,o2,o3,o4..............etc) and make this as primary key.Is it possible in mysql

Please help me.

Thanks

Posted 23-Oct-13 23:35pm

Member 10345959

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Prasad Khandekar · Answer 1 · 2013-10-23T23:56:00

Solution 2

Hello,

You can not directly do so. However this article [^] should help you in achieving this.

Regards,

Posted 23-Oct-13 23:56pm

Prasad Khandekar

phil.o · Answer 2 · 2013-10-23T23:49:00

I don't encourage you to use nvarchar column as a primary key.
Why ? Because indexing an nvarchar is much more costly than an integer type.
Better have an autogenerated primary key of integer type ; this does not prevent the use of a nvarchar column to store a generated order id. By doing this you will have much better performances when you will query your orders table.