It stores its data in a flat address space, much like a completely de-normalized data warehouse.
它将数据储存在一个平面地址空间中，这就像一个完全反规范化的数据仓库。
2
In August, the company reported that Kmart's comparable store sales were flat in the second quarter, while Sears stores in the U.S. saw a decline of 1.2%.
8月份，该公司公布凯马特第二季度同店销售额持平，而西尔斯美国门店下降1.2%。
3
Persistence classes encapsulate access to your persistent stores, including relational databases, flat files, and object bases.