Question

Table 1 :
QUERY: Create table client (
applicationNo int primary key,
name varchar(20)
);

Insert statement: Insert into client values (1,’XYZ’),(1,’ABC’),(1,’DEF’);

applicationNo   |   name  
    1           |   XYZ  
    2           |   ABC  
    3           |   DEF  

Table 2:
Query : Create table client (
applicationNo int,
phoneNo Bigint,
foreign key (applicationNo) references client (applicationNo),
primary key(applicationNO,phoneNo)
);

Insert into phoneNO values (1,999999),(1,888888),(2,777777),(3,666666),(3,555555);

applicationNo | phoneNo
1             |   999999
1             |   888888
2             |   777777
3             |   666666
3             |   555555

Can I retrieve the tuples by joining both the tables in such a way that get the following output, but using single query, also I’m using mysql 5.1

applicationNo |   name | phoneNo1 | phoneNo2 
1             |   XYZ  |  999999  |   88888
2             |   ABC  |  77777   |   Null
3             |   DEF  |  66666   |   555555

Edited : extra information
I tried using this something called cross tab .But I’m not able to use the totalPhoneNo inside the case statement

SELECT applicationNo,count(phoneNo) as totalPhoneNo,  
SUM(CASE WHEN totalPhoneNo= 1 THEN phoneNO ELSE Null END) AS phoneNo1,  
SUM(CASE WHEN totalPhoneNO = 2 THEN phoneNo ELSE Null END) AS phoneNo2  
FROM phoneNO GROUP BY applicationNo;

Answer 1

Try:

select c.applicationNo, 
       max(c.name) name,
       max(p.phoneNo) phoneNo1,
       case 
           when max(p.phoneNo) = min(p.phoneNo) then NULL 
           else min(p.phoneNo) 
       end phoneNo2
from client c
left join phoneNo p on c.applicationNo = p.applicationNo
group by c.applicationNo