Question

This problem is eating up my brain for the past few hours.

I have 2 tables:

**domain_pricing**
action  enum()
map varchar(10)
cost_price  varchar(10)
sale_price  varchar(10) 

**domain_mapping**
map varchar(10)
tld varchar(10)

map is common for both tables.
sample data:

**domain_pricing**
addnewdomain,dotbiz,12,13
renewdomain,dotbiz,12,13
transferdomain,dotbiz,12,13

**domain_mapping**
dotbiz,biz
dotbiz,fizz
dotbiz,jizz

what i need after join:

biz,addnewdomain,12,13
biz,renewdomain,12,13
biz,transferdomain,12,13
fizz,addnewdomain,12,13
fizz,renewdomain,12,13
fizz,transferdomain,12,13
jizz,addnewdomain,12,13
jizz,renewdomain,12,13
jizz,transferdomain,12,13

my query:

select m.tld,p.action,p.sales_price,p.cost_price from domain_pricing as p, domain_mapping as m where p.map=m.map

result:
biz,addnewdomain,12,13
biz,renewdomain,12,13
biz,transferdomain,12,13
dats all, tried doing left join but that gave all values for biz then fizz,null,null and finally jizz,null,null

Can’t figure out where i’m going wrong

Answer 1

I think solved your problem. And the best part is that there is nothing wrong with your query. 😉 You only made a typo in you query. That happens to everybody.

select m.tld,p.action,p.sale*s*_price,p.cost_price from domain_pricing as p, domain_mapping as m where p.map=m.map

It should be:

select m.tld,p.action,p.sale_price,p.cost_price from domain_pricing as p, domain_mapping as m where p.map=m.map

The difference is that you query looks for the non existing column sale*s*. The column you want is sale.

    CREATE TABLE domain_pricing (
  action enum('addnewdomain','renewdomain','transferdomain')  primary key,
  map varchar(10),
  cost_price  varchar(10),
  sale_price  varchar(10)
  );

CREATE TABLE domain_mapping(
  map varchar(10),
  tld varchar(10)
  );

INSERT INTO domain_pricing (action, map, cost_price, sale_price)
VALUES 
('addnewdomain','dotbiz',12,13),
('renewdomain','dotbiz',12,13),
('transferdomain','dotbiz',12,13);

INSERT INTO domain_mapping (map,tld)
VALUES 
('dotbiz','biz'),
('dotbiz','fizz'),
('dotbiz','jizz');

SELECT * FROM domain_pricing;

SELECT * FROM domain_mapping;

select m.tld,p.action,p.sale_price,p.cost_price from domain_pricing as p, domain_mapping as m where p.map=m.map;


select m.tld,p.action,p.cost_price, p.sale_price, from domain_pricing as p, domain_mapping as m where p.map=m.map;

See it in action: http://www.sqlfiddle.com/#!2/f6b83/7

B.T.W. I’m not sure why you would need enum for action? I would suggest to use an integer column for the primary key instead.