sequence

[Frank Dulk]

I have a project with a table " you analyze " and in her I have to place a
field linked sequence the a field of the same table. I explain: this
sequence should grow based on the field company of this table. would be like
this:
Company Sequence
Company A 001
Company A 002
Company A 003
Company B 001
Company C 001
Company B 002
Company A 004