SQL practice help ! Implementing Relationships Use the ALTER command to add primary keys to the Operators,Vehicles and Trips tables. The primary key for each table should bebased on an identity field. Create two new tables that are used to create relationships withthe existing tables (use the diagram below to illustrate therelationships): * Run Table: One operator has many work assignments, calledruns. Each run needs an identifier, and belongs to an operator; usean identity field for the run identifier, and include a field toserve as a foreign key for the operator table. All fields arerequired. The Bid Date field cannot be more than six months in thefuture. * Schedule Table: A schedule identifies the vehicle that willperform each trip, with each schedule entry belonging to a run.Create a table that has an identity field as a primary key, and aforeign key to identify the run the schedule belongs to, and thevehicle performing that schedule. All fields are required. Modify the Trip table: Add a field to identify the schedule thatthe trip belongs to; this fieldis not required. Add a newconstraint that Start time must fall between 5:30am and11:50pm. Attached