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Asked: 2026-05-29T23:59:32+00:00

Possible Duplicate: MySQL dynamic cross tab I have student_record table ——————————————————————- student_id | semester

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Possible Duplicate:
MySQL dynamic cross tab

I have student_record table

-------------------------------------------------------------------
student_id | semester    | schoolyear| name  | section |
-------------------------------------------------------------------
1          | 1st Semester| 2011-2012 | john  | c21     |
2          | 1st Semester| 2011-2012 | eric  | c21     |
3          | 1st Semester| 2011-2012 | mark  | c21     |

and attendance table

-------------------------------------------------------------------
attendance_id | stud_id              | week       | 
-------------------------------------------------------------------
1             | 1                    | 02/04/2012 | 
2             | 2                    | 02/04/2012 | 
3             | 3                    | 02/04/2012 | 
4             | 1                    | 02/11/2012 | 
5             | 2                    | 02/11/2012 | 
6             | 1                    | 02/18/2012 | 
7             | 2                    | 02/18/2012 | 
8             | 3                    | 02/18/2012 |

And I want to achieve this output using sql.

-------------------------------------------------------------------
student_id | name    | 02/04/2012 | 02/11/2012  | 02/18/2012 |
-------------------------------------------------------------------
1          | john    | present    | present    | present     |
2          | erik    | present    | absent     | present     |
3          | mark    | present    | present    | present     |

this is very vague to me, can anyone help?
I tried this, but didn’t work.

Select week,
[02/28/2012],
[02/29/2012]
From attendance
group by student_id
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1 Answer

  1. Editorial Team

    Regardless of the database you are using, the concept of what you are trying to achieve is called “Pivot Table”.

    Here’s an example for mysql:
    http://en.wikibooks.org/wiki/MySQL/Pivot_table

    Some databases have builtin features for that, see the links below.

    SQLServer:
    http://msdn.microsoft.com/de-de/library/ms177410.aspx

    Oracle:
    http://www.dba-oracle.com/t_pivot_examples.htm

    You can always create a pivot by hand. Just select all the aggregations in a result set and then select from that result set.

    Also check this link, you will get your answer provided by MGA…

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