You build relationships between tables.
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there are significant differences between a spreadsheet and a database (also refering to Your other posting about INDEX/MATCH)
Although there are some analogies, a crash-course into database system is recommended (-:
for $cell$row, there are field-variables, script-variables, one-record-tables, etc. available in FileMaker - but diving into needs some time
thank you Markus,
I will try your suggestions...