Question

Please submit SQL statements as a plain text file (.txt). If blackboard rejects txt file you can submit a zipped file containing the text file. Word, PDF, or Image format are not accepted. You do not need to show screen shot. Make sure you have tested your SQL statements in Oracle 11g.

The list of tables is:

Tables:

Cust Table:

cid, -- customer id

cname, --- customer name

cphone, --- customer phone

cemail, --- customer email

Category table:

ctid, --- category id

ctname, --- category name

parent, --- parent category id since category has a hierarchy structure, power washers, electric power washers, gas power washers. You can assume that there are only two levels.

Tool:

tid, --- tool id

tname, --- tool name

ctid, --- category id, the bottom level.

quantity, --- number of this tools

Time_unit table allowed renting unit

tuid, --- time unit id

len, --- length of period, can be 1 hour, 1 day, etc.

min_len, --- minimal #of time unit, e.g., hourly rental but minimal 4 hours.

Tool_Price:

tid, --- tool id

tuid, --- time unit id

price, -- price per period

Rental:

rid, --- rental id

cid, --- customer id

tid, --- tool id

tuid, --- time unit id

num_unit, --- number of time unit of rental, e.g., if num_unit = 5 and unit is hourly, it means 5 hours.

start_time, -- rental start time

end_time, --- suppose rental end_time

return_time, --- time to return the tool

credit_card, --- credit card number

total, --- total charge

Problem . Insert at least three rows of data to each table above. Make sure you keep the primary key and foreign key constraints. [20 points]

Answer 1

--Table: Customer (Primary key is cid)
---------------
insert into Customer(cid,cname,cphone,cemail) values(100,'Ramya',9500123321,'[email protected]');
insert into Customer(cid,cname,cphone,cemail) values(101,'Aaruu',9500123322,'[email protected]');
insert into Customer(cid,cname,cphone,cemail) values(102,'Saaai',9500123323,'[email protected]');

--Table: Category(Primary key is ctid)
---------------
insert into Category(ctid,ctname,parent) values(1000,'Electronics',2000);
insert into Category(ctid,ctname,parent) values(2000,'Automobile',3000);
insert into Category(ctid,ctname,parent) values(3000,'Furniture',null);

--Table: Tool(Primary key is tid and foreign key is ctid)
---------------
insert into Tool(tid,tname,ctid,quantity,time_unit) values(111,'AC',1000);
insert into Tool(tid,tname,ctid,quantity,time_unit) values(222,'Speaker',1000);
insert into Tool(tid,tname,ctid,quantity,time_unit) values(333,'Refridgerator',1000);

--Table: Time_unit (Primary key is tuid)
---------------
insert into Time_unit(tuid,len,min_len) values(10,15,2)
insert into Time_unit(tuid,len,min_len) values(20,25,3)
insert into Time_unit(tuid,len,min_len) values(30,35,4)

--Table: Tool_Price(It is a bridge table between Tool and Time_unit tables, Foreign keys are tid and tuid)
---------------
insert into Tool_Price(tid,tuid,price) values(111,10,300);
insert into Tool_Price(tid,tuid,price) values(222,20,400);
insert into Tool_Price(tid,tuid,price) values(333,30,500);

--Table: Rental(Primary key is ric and foreign keys are cid, tid and tuid)
---------------
insert into Rental(rid,cid,tid,tuid,num_unit,start_time,end_time,return_time,credit_card,total)
values(1,100,111,10,340,2019-10-09 12:00:00,2019-10-01 10:00:00,2019-10-12 10:00:00,435628675912,1800)
insert into Rental(rid,cid,tid,tuid,num_unit,start_time,end_time,return_time,credit_card,total)
values(2,101,222,20,670,2019-10-09 12:00:00,2019-10-01 10:00:00,2019-10-12 10:00:00,435628675912,2750)
insert into Rental(rid,cid,tid,tuid,num_unit,start_time,end_time,return_time,credit_card,total)
values(3,102,333,30,890,2019-10-09 12:00:00,2019-10-01 10:00:00,2019-10-12 10:00:00,435628675912,6950)