[GENERAL] what is the data type for files(.txt,.doc,.jpeg) in pgsql

[rama krishna]

1)I need to insert the files in database .So what i have to give the
data type for that field while creating the table.

  And how to insert  and select the file from the database.

 2)I need to perform some action in database before it shutting down
or before booting of my server.What to do for this situation

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