As David said, you'd be better off having a table that looks like this (in terms of columns): * MONTH * AGENT * CASHFLOW So your query to get the sum of a single agent would be looking like: select sum(CHASFLOW) where AGENT = 'Agent' and MONTH between values; It might be a little more work to create a GUI for that (or map this model to the existing GUI) but it is much simpler to maintain and work with. On 30.08.2018 11:13, a wrote: > Hi all: > > > I need to make a table contains projected monthly cashflow for multiple agents (10,000 around). > > > Therefore, the column number would be 1000+. > > > I would need to perform simple aggregate function such as count, sum or average on each cashflow projected. > > > So if there is anyway of doing this? Will there be anything like define a macro in C that I can manipulate multiple columns by simple word that representing them. > > > Thanks so much! > > > Shore >