Error validating check constraint

15-Nov-2016 00:37 by 6 Comments

Error validating check constraint

The table will include the following columns: Customer Id, First Name, Last Name, Status, Phone, City, State, and Zip.He has authored 11 SQL Server database books, 21 Pluralsight courses and has written over 4000 articles on the database technology on his blog at a https://blog.

Because we know our data meets its needs, we can safely do: would have to have some sort of error handling if the name didn’t have a space in it.

The CHECK constraint is used to limit the value range that can be placed on a column.

On my a table "Projects" I've created a ntext column called "status".

It is also possible to use them to enforce data integrity for model instances, but that's not a recommended use unless the only way to modify the database is through model instances, or you have complex data integrity requirements that aren't possible to specify via database-level constraints.

Data integrity is best handled by the database itself.

And if you have a varchar column where the length of the entries should be between 2 and 255, you should be setting the size of the varchar column to 255, and using a CHECK constraint to ensure that all values have at least two characters.

Unfortunately, sometimes there are situations where that is not possible.insert into users(id,name,email) values (1,'Bob','[email protected]'); ERROR: new row for relation "users" violates check constraint "users_name_must_look_like_a_name" DETAIL: Failing row contains (1, Bob, [email protected]). This means that a) our data will always match our rules around what good data is, and b) our code can rely on this.For example, suppose we have to integrate with a third party shipping system that, for whatever reason, requires a first and last name."Sam and Freddie did date and it ended horribly," admitted Kress.We say yes to a very few - limiting it to locales that are at once casually hip and wonderfully flirty.As developers, we have a duty to ensure our code meets its requirements.

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