简单的shell脚本从数据库中删除帖子

Question

Trying to run a shell script to delete posts from a wordpress database. At the moment it is just outputting the mysql syntax help screen. I was wondering if someone could help me debug this script:

#!/bin/bash
mysql -u ***** -p***** admin-wp "SELECT * FROM admin_wp.wp_8_posts LIMIT 0, 10
WHERE post_type = 'post' AND DATEDIFF(NOW(), post_date) > 30" << EOFMYSQL

Answer 1

If you're putting the query in the command line, you introduce it with the -e option, and you don't need <<EOFMYSQL .

mysql -u ***** -p***** admin-wp -e "SELECT * FROM admin_wp.wp_8_posts WHERE post_type = 'post' AND DATEDIFF(NOW(), post_date) > 30 LIMIT 0, 10 "

If you want to use a here-doc, you put it after the command:

mysql -u ***** -p***** admin-wp <<EOFMYSQL
SELECT * 
FROM admin_wp.wp_8_posts 
WHERE post_type = 'post' AND DATEDIFF(NOW(), post_date) > 30
LIMIT 0, 10 
EOFMYSQL

Also, your SQL syntax was wrong. LIMIT has to come after WHERE . BTW, it doesn't make much sense to use LIMIT without ORDER BY -- it will just pick any random 10 rows from the results.