Question

Parent Table

ID EMP_ID EMP_NAME

1 emp01 Sam

2 emp02 Jam

3 emp03 Mam

Child Table 1

ID EMP_ID EMP_ADDRESS

1 1 A Street

2 1 B Street

3 2 Z Street

4 3 L Street

5 3 M Street

6 3 N Street

Child Table 2

ID EMP_ID EMP_PHONE

1 1 123456789

2 1 456789123

3 3 456987321

4 3 465987321

5 3 321651213

If i pass the input as ’emp01′, i need to get all the information from parent and child tables

Parent table ID and Child emp_id forms the foreign key relationships

How can this be achieved?

Answer 1

select p.ID,
       p.Emp_ID,
       p.Emp_Name,
       c1.Emp_address,
       c1.Emp_id,
       c1.id,
       c2.Emp_Phone,
       c2.Emp_id,
       c2.id
   FROM 
      parent p
      LEFT JOIN child1 c1 ON c1.id = p.id
      LEFT JOIN child2 c2 ON c2.id = p.id
   WHERE p.Emp_ID ='emp01';

****EDIT**

select p.ID,
           GROUP_CONCAT(c2.Emp_Phone)
       FROM 
          parent p
          LEFT JOIN child1 c1 ON c1.id = p.id
          LEFT JOIN child2 c2 ON c2.id = p.id
       WHERE p.Emp_ID ='emp01'
        GROUP BY p.Emp_ID;