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automatically generated text fields in MySQL

Posted on 2016-09-13
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Last Modified: 2016-10-03
How do I create a test  auto-generated field in a MySQL table? Can this field be used as a primary key? If so, what is the syntax for the create statement?

For example

Create table test (
text_id varchar(50) not null generated,
primary key (text_id));
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Question by:chonabraham
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4 Comments
 
LVL 55

Expert Comment

by:Julian Hansen
ID: 41796906
What do you mean by auto generated?
For a primary key the field must be unique - you can use an autonumber but this is an int field?

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Author Comment

by:chonabraham
ID: 41797106
can you have a Pk that is varchar and have MySQL generate the unique characters? How do you get MySQL to generate a unique varchar combo to use as the value for any field?
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Accepted Solution

by:
Julian Hansen earned 500 total points (awarded by participants)
ID: 41797315
You can use a UUID() default value
create table `ee`.`TableName1`( 
   `id` char(40) DEFAULT 'UUID()' , 
   `Name` varchar(100) 
 )

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