First we query the database to get a row set of all the items that match the selected category.

首先查询数据库以获取与所选种类匹配的所有货品的行集。

youdao

First we query the database to get a row set of all the items that match the selected category.

首先查询数据库以获取与所选种类匹配的所有货品的行集。

youdao