Thus the confusion in storage requirements particularly when transporting The main difference between the two is that SQL Server's text representation of the GUID is sometimes shown with. You can use these functions as default values in your table for columns that you need to have unique identifiers or just call them directly similar to what you do with SQL Server's NEWID() function. In additon there is a contrib module uuid-osp which provides variousįunctions for auto-generating uuids. PostgreSQL offers similar functionality via the uuid datatype. You may be wondering how you could get the same functionality in PostgreSQL. All the aforementioned use the standard 32-hexadecimal digit (with -) unique identifier. Or in Microsoft Access when you choose AutoNumber and FieldSize = Replication ID. If you come from Microsoft world, you probably know UUIDs by the term GUIDs, RowGUID, or data type uniqueidentifier or the thing that the NEWID() function in SQL Server generates, I'm not sure how popular they are to use in other databases, but in SQL Server (and even in Microsoft Access), they are very popular, particularly if you need to synchronize data with various offices. Since this is a question often asked by users coming from Microsoft SQL Server, we will demonstrate in this article the same concept in Microsoft SQL Server and how you would achieve similar functionality in PostgreSQL.
#POSTGRESQL VS SQL SERVER GENERATOR#
You want some non-centralized mechanism to ensure the ids generated from each server will never overlap.įor generating these ids and each standard will tie the id based on some unique identifier of the computer or a namespace or just a purely random generator algorithm not tied to anything.
This is important if you have multiple servers or disperate systems that need to replicate or shareĭata and each can generate data on its own end. The main use as far as databases go is to ensure uniqueness of keys across databases. Identifiers standardized by the Open Software Foundation. Universal Unique Identifiers are 16-byte / 32-hexadecimal digit (with 4 -s for separation)
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