Need to add some sort of constraint on my table column. I need to make sure that the user does not enter, manually or otherwise, the same text in more than one row of the table. How can I achieve this?
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Need to add some sort of constraint on my table column. I need to make sure that the user does not enter, manually or otherwise, the same text in more than one row of the table. How can I achieve this?
You’ll want to use some type of unique constraint or, of course, the primary key would work as well. For example:
There are other methods of creating this discussed on SE as well.