Set up a cron job using values from a database in a java servlet -

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i have servlet in query db2 due_dates, need send reminder emails customers.

i know how set cron jobs weekly or daily tasks standalone java class not know how take output of query , use set job in cron scheduler.

how can schedule cron job using due_dates values ?

youd better of having cron run every day/12 hours or whatever , send emails due rather trying schedule cron


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