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If I have ID column, which is a primary key and Identity is set to TRUE, inserting each row should increment my ID. My question is, if I have 100 rows and a function (somewhere in the code) to select random row (rand(1,101)), how to deal with a situation, when I delete a row and random function fails if the one was selected. I could manage this exception in the code, but wonder if there is a way in SQL to fill these deleted row gaps with continues IDs.
Guessing SQL Server because of “Identity”
Use
TOP 100.. ROW_NUMBER()instead to generate 100 contiguous values and filter on that value.Or use
TOP 1..ORDER BY NEWID()to choose a random row.Internal IDENTITY values have no meaning except as a surrogate key. Note an INSERT fail also increments the IDENTITY value, not just deletes.