I have 3 tables. cinema, booking and customer
create table cinema
(
c_id int,
location varchar(10)
)
insert into cinema values(1,'New York');
insert into cinema values(2,'London');
insert into cinema values(3,'Paris');
create table booking
(
c_id int,
cust_id int
)
insert into booking values(1,10);
insert into booking values(2,11);
insert into booking values(3,12);
insert into booking values(3,13);
insert into booking values(2,14);
create table customer
(
cust_id int,
cust_name varchar(10)
)
insert into customer values(10,'sam');
insert into customer values(11,'adrian');
insert into customer values(12,'mark');
insert into customer values(13,'jim');
insert into customer values(14,'tom');
I want to select customer id(ie; cust_id), customer name(cust_name) and location(from cinema table) of all customer who have not booked in paris.
what i want is --
cust_id cust_name location
10 sam New York
11 adrian London
14 tom London
I tried a lot.... one of my code is ---
SELECT customer.cust_id,customer.cust_name,
cinema.location as Location FROM booking,cinema,customer
WHERE booking.c_id=cinema.c_id AND location!='Paris';
it gives me 15 result.. I cant think how to do this.. please help me with this.
In your code you're not joining booking
to customer
, which is causing your problem. I use explicit joins as opposed to implicit here. Though there is no difference , the explicit syntax is standard.
select cu.cust_id, cu.cust_name, ci.location
from cinema ci
join booking b
on ci.c_id = b.c_id
join customer cu
on b.cust_id = cu.cust_id
where ci.location <> 'Paris'
I'm not entirely certain about the structure of your booking table. I would expect a few more columns, for instance number of tickets, etc.
Your WHERE statement
is not as specific as you want. You need a condition matching booking.cust_id to customer.cust_id
:
WHERE booking.c_id = cinema.c_id
AND booking.cust_id = customer.cust_id
AND location != 'Paris'
The way you are doing it now, you are geting results for all combinations of customers.
See the below example :
Select
businessuser.UserName,
businessuser.EmailAddress,
businessimages.ImgName,
featured_cart.FeaturedPlan,featured_cart.StartDate
From featured_cart
Inner Join businessimages on featured_cart.FeaturedProId = businessimages.IdBusinessImages
Inner Join businessuser on businessimages.UserId = businessuser.IdBusinessUser
and featured_cart.FeaturedType = "Featured Email"
3 tables are :
this example work properly...
MS SQL Server 2008:
select cust_id, cust_name, location
from customer c
inner join booking b
inner join location l
on c.cust_id = b.cust_id and b.c_id=l.c_id
Compound Join Joining Four Tables:
Used 4 Tables
This Example works 100% You can try this in W3schools - Inner Join 'Try yourself' SQL Editor tables are taken from the W3schools Editor.
QUERY:
Select Customers.CustomerName as Table1_Customer, Orders.EmployeeID as Table2_Employee, OrderDetails.Quantity as Table3_OrderDetails,Products.ProductName as Table4_Products
From Customers
INNER JOIN Orders
ON Customers.CustomerID = Orders.CustomerID
INNER JOIN OrderDetails
ON Orders.OrderID = OrderDetails.OrderID
INNER JOIN Products
ON OrderDetails.ProductID = Products.ProductID Order by EmployeeID;
hii you can use join like this:
SQL
select customer.cust_id,customer.cust_name,cinema.location from cinema,customer,booking where cinema.c_id=booking.c_id and booking.cust_id=customer.cust_id and cinema.location not like 'paris';
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