SQL Server - Guid VS. Long

Question

Up until now i\'ve been using the C# \"Guid = Guid.NewGuid();\" method to generate a unique ID that can be stored as the ID field in some of my SQL Server database tables us

Answer 1

A long (big int in sql server) is 8 bytes and a Guid is 16 bytes, so you are halving the number of the bytes sql server has to compare when doing a look up.

For generating a long, use IDENTITY(1,1) when you create the field in the database.

so either using create table or alter table:

Field_NAME BIGINT NOT NULL PRIMARY KEY IDENTITY(1,1)

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