Long integer variables are stored as 32-bit (4 bytes) signed values ranging from -2,147,483,648 to 2,147,483,647. The type declaration character of Long is ampersand; )。

2. If the automatic numbering starts from 1, once it reaches 2 147483647, it will automatically jump to -2 147483648, and then continue to shrink until 0.

3. If 1 is reached again, if the "Index" attribute of the automatic numbering field is defined as "Yes (no duplicate)" when designing the table, the system will prompt an error. If it is not set, the automatic numbering will continue to increase from 1.

4. Synchronous replication ID, also known as globally unique identifier (GUID(GUID: 16 byte field, used to establish the unique identifier of synchronous replication in the Access database. GUID are used to identify replicas, replica sets, tables, records, and other objects. In an Access database, GUID refers to the synchronous replication ID. ))。 N/A 16 bytes

The content is similar to {8 aed7962-cfe3-481a-a513-e5346b 75029d}

If you need to convert the data type, you can generally convert it into text.