Comparing doc or pdf Files from Using SQL Server

Transact-SQL
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1

hi friends
i have very interesting qeustion
can we comparing two another files with sql server
for example
in varbinary column have a pdf format file
in inserting new data in this table first i need compare
files with another files in my table
have this file in this table or not
and
can we compare files finding text from inserting file data
thanks

2

Using FileTables or FILESTREAM?