check for previous entry

  • Thread starter Thread starter MichaelCasper
  • Start date Start date
M

MichaelCasper

I use column "D" for entering invoice numbers.How can I have Excel lock at
all previous enteries to see if I am duplicating an entry on any other row of
column "D"
 
You could apply data validation on that col D

Select col D
Click Data > Validation
Allow: Custom
Formula: =COUNTIF(D:D,D1)<2
Click OK

Test it out ..
--
Max
Singapore
http://savefile.com/projects/236895
Downloads:17,500 Files:358 Subscribers:55
xdemechanik
 
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