It doesn't sound too hard. You want a function, call it getKeys(), to read from the small source files that reads a line at a time, splits() it on your delimiter into token keys, then calls another function, call it slurpData(), that reads in the appropriate data from the key file, and prints a line to the database, which can probably be left open.

So the main process just calls getKeys() as many times as necessary to cover all your sources.

In reply to Re: reading from a large file and writing to a file by halfcountplus
in thread reading from a large file and writing to a file by vikashiiitdm

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