Question

i have these two tables,

 employeeid | firstname  | lastname |   address   | pan  |  joindate  | lastupdatedate | annualincome | taxrate | currentgrade 
------------+------------+----------+-------------+------+------------+----------------+--------------+---------+--------------
          1 | tushar     | mishra   | bommanhalli | ab7c | 2012-10-15 |                |       300000 |    0.05 |            2
          2 | puneet     | purohit  | j.p         | ab5c | 2012-10-15 |                |       300000 |    0.05 |            2
          3 | vishwanath | b.s      | btm         | ab6c | 2012-10-15 |                |       300000 |    0.05 |            1
          4 | xavier     | d'souza  | btm         | ab8c | 2012-10-15 |                |       300000 |    0.05 |            1
          5 | deepak     | kumar    | hebbal      |      | 2012-10-15 |                |       300000 |    0.05 |            1

and other one..

employeeid | salarydate | income | tax  
------------+------------+--------+------
          2 | 2012-11-01 |  25000 | 1250
          3 | 2012-11-01 |  25000 | 1250
          4 | 2012-11-01 |  25000 | 1250
          5 | 2012-11-01 |  25000 | 1250
          2 | 2012-12-01 |  25000 | 1250
          3 | 2012-12-01 |  25000 | 1250
          4 | 2012-12-01 |  25000 | 1250
          5 | 2012-12-01 |  25000 | 1250
          2 | 2013-01-01 |  25000 | 1250
          3 | 2013-01-01 |  25000 | 1250
          4 | 2013-01-01 |  25000 | 1250
          5 | 2013-01-01 |  25000 | 1250
          1 | 2012-11-01 |  25000 | 1500
          1 | 2012-12-01 |  25000 | 1500
          1 | 2013-01-01 |  25000 | 1500

here the tax column in second table is for a month .i want to fetch the name of the employee who had paid highest tax last year. here employee id in second table is referenced to the employeid in 1st table.

Answer 1

Use this code.

select salary.employeeid,firstname,lastname, sum(tax) 
 from salary
left join employee 
   on salary.employeeid=employee.employeeid
group by salary.employeeid,firstname,lastname
order by sum(tax) DESC LIMIT 1