Any SQL coders here -- Sql question


jimbo45

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Hi there
While looking at code generated by HeidiSql for browsing the data in a test MariaDB table (equiv to older MySQL DB's) I saw this
:

Skjámynd 2022-06-13 122739.png

Anybody care to explain what it actually means !! (Select Constraint ..... line) I've used SQL quite a lot in the past but can't remember ever using that statement.


Thanks

Cheers
jimbo
 

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