cron 作业从 debian 上的 postgres 中删除旧数据 [英] cron job to remove old data from postgres on debian

问题描述

I need to create a cron that runs every night and remove some of the data (older ones) from my database. I am running postgres on debian. How do I do that? My server is tomcat6. Does anyone have a step by step instruction including script to do that?

解决方案

in most cases, I prefer a shell script with an here-document. (shell-variables expand nicely in here-documents):

#!/bin/sh
PSQL=/local/postgres/bin/psql
SOME_VALUE=123

$PSQL my_database <<THE_END
DELETE FROM my_table
WHERE my_column <= $SOME_VALUE
    ;
THE_END

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