We need one table, not two tables.

我们需要一张桌子，不是两张桌子。

youdao

As we examined the tables, we found that two joining columns, customer.custid and order.custid, do not have indexes.

在检查这些表时，我们发现两个没有索引的连接列：customer . custid和order . custid。

youdao

By separating these, we intended to reduce the performance impact of logging queries of the file database; they are not merely separate tables, but two separate databases.

这么做是为了减少记录文件数据库查询所带来的性能影响；它们不但是单独的表，而且还是两个单独的数据库。

youdao