Question

Is there any way to retrieve data like this (first row is column header):

data   no    answer
data1  1     X1
data1  2     X2
data1  3     X3
data1  5     X5
data2  1     Y1
data2  2     Y2
data2  4     Y4

in format like this (again, first row is column header):

data   no1   no2   no3   no4   no5
data1  X1    X2    X3    null  X5
data2  Y1    Y2    null  Y4    null

using SQL query (in MySQL)?

Answer 1

Unfortunately, MySQL does not have PIVOT functionality. So you will have to perform this another way.

Using CASE statements:

select data,
  MIN(CASE WHEN no = 1 THEN answer END) as no1,
  MIN(CASE WHEN no = 2 THEN answer END) as no2,
  MIN(CASE WHEN no = 3 THEN answer END) as no3,
  MIN(CASE WHEN no = 4 THEN answer END) as no4,
  MIN(CASE WHEN no = 5 THEN answer END) as no5
from test
group by data

See SQL Fiddle with Demo