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Check Constrain to existing table


Check Constrain to existing table

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Steve Jones
Steve Jones
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Group: Administrators
Points: 328403 Visits: 20105
A short piece that has a scenario of an existing table with some bad data. We want to prevent more, so we add a check constraint. However we don't want to check existing data.

Then we can clean up bad data over time.

A short story that shows how this might work.

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Hugo Kornelis
Hugo Kornelis
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Group: General Forum Members
Points: 34263 Visits: 13110
I can take this one. Nice synergy with my article on trusted vs untrusted constraints.

I am quite busy so if you're in a hurry you'll need to find someone else.
(And you might want to send me a reminder after some time)


Hugo Kornelis, SQL Server/Data Platform MVP (2006-2016)
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis
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