SQL server identity column values start at 0 instead of 1

Question

I\'ve got a strange situation with some tables in my database starting its IDs from 0, even though TABLE CREATE has IDENTITY(1,1). This is so for some tables, but not for ot

Answer 1

From DBCC CHECKIDENT

DBCC CHECKIDENT ( table_name, RESEED, new_reseed_value )

If no rows have been inserted to the table since it was created, or all rows have been removed by using the TRUNCATE TABLE statement, the first row inserted after you run DBCC CHECKIDENT uses new_reseed_value as the identity. Otherwise, the next row inserted uses new_reseed_value + the current increment value.

So, this is expected for an empty or truncated table.