The reader to formulate some sample queries as relational algebra ex-pressions. (By way of an interesting variation on these "query" exercises, the reader might like to try looking at some of the answers first and stating what the given expression means in English.) 1. Get full details of all projects in London. 2. Get supplier numbers for suppliers who supply project J I. 3. Get all shipments where the quantity is in the range 300 to 750 inclusive. 4. Get all pan-color/part-city combinations. Note Here and in subsequent exercises, the term "all" is to be taken to mean "all currently represented in the database," not "all possible."

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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.