Question

List item

I am new to php and I am trying to do the following:

empid  Salary   Month
1      2342     Jan 
1      3234     Feb
1      3445     Mar
2      3222     Jan
2      3342     Feb
3      3352     Mar

How do I display it as:

empid  jan   feb    mar
1      2342  3234  3445
2      3222  3342  3352

Answer 1

You need to pivot rows into columns like so:

SELECT
  emp_id,
  MAX(CASE WHEN month_end = 'jan' THEN salary END) 'jan',
  MAX(CASE WHEN month_end = 'feb' THEN salary END) 'feb',
  MAX(CASE WHEN month_end = 'mar' THEN salary END) 'mar'
FROM Emps
GROUP BY emp_id

And this is the standard way to do this. It should work for all RDBMS.