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並前往https://dba.stackexchange.com/questions/69254/whats-the-most-efficient-uuid-column-type

What's the most efficient UUID column type - DBA ...

a byte[16] column · two bigint/long(64 bits) columns · a CHAR(36) column - 32 hex digits + 4 dashes. · a UUID database specific column, if db supports it.

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