item_info store item_id store_id city itemname color state sales size country item_id store_id customer_id date category customer питber customer_id date_info price пате date street тonth city quarter state year zipcode country Figure 11.2 Star schema for a data warehouse.

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SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.