Here we see that the mapping for Customer's Address field links the two halves of the relationship together with the foreign key reference in the table schema file.
The fields (reference, date, buyer, address, and total) are written according to the mapping table.
根据映射表编写字段(reference、date、buyer、address 和 total)。
3
When logical overwrite is performed a number of times, arbitrary data achieved before logical overwrite are reproduced by sequential reference to the old physical address of the correlation table.