Delete Assignment2_solution.sql

Assignment2_solution.sql

-use omila405;
-#Q1:
-select * from jbemployee;
-#Q2:
-select name from jbdept order by name;
-#Q3:
-SELECT * FROM jbitem where qoh=0;
-#Q4:
-select * from jbemployee where salary between 9000 and 10000;
-#Q5:
-select name,startyear-birthyear AS 'Age'from jbemployee;
-
-#Q6:
-select * from jbemployee where name regexp 'son,';
-#Q7:
-select * from jbitem where supplier = (select id from jbsupplier where name='Fisher-Price');
-#Q8:
-select jbitem.*, jbsupplier.name as supplierName  from jbitem 
-join jbsupplier on jbitem.supplier=jbsupplier.id
-where jbsupplier.name="Fisher-Price";
-#Q9:
-select city.id,city.name,sup.city from jbsupplier sup left join jbcity city on city.id=sup.city;
-#Q10:
-select name,color from jbparts where weight >(select weight from jbparts where name='card reader');
-#Q11:
-select p1.name,p1.color,p1.weight from jbparts p1 join jbparts p2 on p2.name='card reader' where p1.weight>p2.weight;
-#Q12:
-select AVG(weight) from jbparts where color='black';
-#Q13:
-select p.name as part_name,(sup.quan*p.weight) as total_weight,c.state from jbsupply sup left join jbparts p on sup.part=p.id 
-	 join jbsupplier on jbsupplier.id=sup.supplier
-     join jbcity c on c.id=jbsupplier.city
-    where c.state='Mass';
-
-
-
-#Q14:
-create table item_copy as
-	select * from jbitem where price < (select AVG(price) from jbitem) ;
-
-#Q15:
-create view item_copy_view as
-	select * from jbitem where price < (select AVG(price) from jbitem) ;
-#Q16:view is an virtial table and saves in views. It doesn't have rows(tuples) and columns(attributes) like tables.
-#View depends on tables so it is dynamic, table is independant and static.
-#Refrence:https://pediaa.com
-
-#Q17:
-create view view2 as
-	select jbdebit.id,(jbsale.item*jbsale.quantity) as total_cost from jbdebit left join jbsale on jbdebit.id=jbsale.debit;
-
-#Q18:
-select debit , (jbsale.quantity*jbitem.price) as total from jbsale join jbitem on jbsale.item=jbitem.id;
-#Q19:
-SET SQL_SAFE_UPDATES = 0;
-SET FOREIGN_KEY_CHECKS=0; -- to disable them
- DELETE jbsupplier
-from jbsupplier 
-INNER JOIN jbcity on jbsupplier.city = jbcity.id
-where jbcity.name="Los Angeles";
-SET FOREIGN_KEY_CHECKS=1; -- to re-enable them
-SET SQL_SAFE_UPDATES = 1;
-
-#Q20:
-create view jbsale_supply2(supplier,item,quantity) AS
-	select jbsupplier.name,jbitem.name,jbitem.qoh
-	from jbsupplier,jbitem
-	where jbsupplier.id=jbitem.supplier;
\ No newline at end of file