What is the advantage of GUID over INT?

GUID (Globally Unique Identifier) has several advantages over INT as an identifier:

• Global uniqueness: GUID guarantees uniqueness worldwide, which is especially important for distributed systems and data integration from different sources.
• No collision during data merging: merging databases with INT identifiers can lead to conflicts, while GUID minimizes this problem.
• Independence from sequence: INT is often auto-incremented, which can reveal information about the number of records or creation order, whereas GUID conceals this information.

However, it is worth noting that GUID takes up more space (usually 16 bytes compared to 4 bytes for INT) and can reduce index performance in the database.