1. Validation
Validation
Validation
Validation
,
,
Validation
1.
Group
Refers to:
=OFFSET(Sheet1!$A$2,0,0,COUNTA(Sheet1!$A$2:$A$65536))

2. 2.
Sub_Group
Refers to:
=OFFSET(Sheet1!$D$2,MATCH(Sheet1!$F2,Sheet1!$C$2:$C$7,0
)-1,0,COUNTIF(Sheet1!$C$2:$C$7,Sheet1!$F2))
3.
Validation
F3
http://snasui.blogspot.com/2010/07/validation.html