Wal-Mart Stores Inc . , Kohl 's Corp. , Family Dollar Stores Inc. and Big Lots Inc. were among the merchants posting May sales that fell below Wall Street 's modest expectations .
Wal- Mart , Kohl 's Corp. , Family Dollar Stores Inc . , and Big Lots Inc. posted May sales that fell below Wall Street 's modest expectations .
uses the data in a data warehouse to look for new patterns or previously &"hidden&" knowledge