Actually I want to create timesheet.
let say:
col1 | col2 | col3| col4 |mon |tues | wed |thu |fri |sat |
- | - | - | - |ot|nt |ot|nt | ot|nt |ot|nt |ot|nt |ot|nt|
i want merge by column in column 1 - 4
and column day , i want to divide into ot and nt.