[mysql] Table is marked as crashed and should be repaired

I am getting this error in wordpress phpMyadmin

#145 - Table './DB_NAME/wp_posts' is marked as crashed and should be repaired 

When I login to phpMyadmin, it says wp_posts is "in use"

My website is currently down because of this.

I googled this problem, but I don't see the "repair" button on phpMyadmin. Please let me know how to fix this. I am not sure where to issue PHP command. Please advise, my proficiency with PHP is very basic.

When I got this error:

#145 - Table '.\engine\phpbb3_posts' is marked as crashed and should be repaired

I ran this command in PhpMyAdmin to fix it:

REPAIR TABLE phpbb3_posts;

I had the same issue when my server free disk space available was 0

You can use the command (there must be ample space for the mysql files)

REPAIR TABLE `<table name>`;

for repairing individual tables

Connect to your server via SSH

then connect to your mysql console

and

USE user_base
REPAIR TABLE TABLE;

-OR-

If there are a lot of broken tables in current database:

mysqlcheck -uUSER -pPASSWORD  --repair --extended user_base

If there are a lot of broken tables in a lot of databases:

mysqlcheck -uUSER -pPASSWORD  --repair --extended -A

Run this from your server's command line:

 mysqlcheck --repair --all-databases

This means your MySQL table is corrupted and you need to repair it. Use

myisamchk -r /DB_NAME/wp_posts

from the command line. While you running the repair you should shut down your website temporarily so that no new connections are attempted to your database while its being repaired.