11)Consider the following Entities and Relationships [30 Marks]
Supplier (sid, sname, addr)
Parts (pid, pname, pdesc)
Relation between Supplier and Parts is Many to Many with cost as descriptive attribute.
Constraint: Primary key, cost should be > 0.
Create a Database in 3NF & write queries for following.
• Display Supplier details from 'Mumbai' city.
• Update cost by 25 % for all parts supplied by supplier ‘Mr. Pawar’.
• Display all parts supplied by each supplier.
• Display details of parts which are supplied at maximum price by each supplier.
• Display all suppliers who supply part ‘wheel’ and also display its cost.
-->Display Supplier details from 'Mumbai' city.
sql>select * from supplier where addr='mumbai';
Update cost by 25 % for all parts supplied by supplier ‘Mr. Pawar’.
sql>update sup_parts set cost=cost+cost*0.25 where 'ram'=(select sname from supplier where sid =sup_parts.sid);
1row updated.
sql>select * from sup_parts;
Display all parts supplied by each supplier.
sql>select pname,sname from supplier,parts,sup_parts where supplier.sid=sup_parts.sid and parts.pid=sup_parts.pid group by sname,pname;
Display details of parts which are supplied at maximum price by each supplier.
sql>select max(cost),sname,pname,pdesc from supplier,parts,sup_parts where supplier.sid=sup_parts.sid and parts.pid=sup_parts.pid group by sname,pname,pdesc;
Display all suppliers who supply part ‘wheel’ and also display its cost.
sql>select sname,cost from supplier,parts,sup_parts where supplier.sid=sup_parts.sid and parts.pid=sup_parts.pid and pname='wheel';
/
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