ive got two worksheets both with approx 20,000 records of various data but they both have a unique identifier (i'll call this ref no.) in sheet A there is a column named dates which doesnt appear in sheet 2. I have been using an offset(match()) formula to look in sheet a for a match on the ref no and if it exists find the associated date and place in the new column on sheet B. doing this over all 20,000 records in sheet b slows down the time it takes to calculate, and all other calculations in the book. I figured i might be able to use a vb code loop of some sort to carry out the action for me.
please help
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