Wordpress error database

Hi,

Today I woke up and my main domain (I have a wordpress multisite installation) is not working. It returns me "error establishing a database connection". And when I access in the wp-admin returns "one or more database tables are unavailable. the database may need to be repaired". When I try to repair it, it returns me that:

users: 2 clients are using or haven't closed the table properly
usermeta: 3 clients are using or haven't closed the table properly
posts: 4 clients are using or haven't closed the table properly
comments: 1 client is using or hasn't closed the table properly
options: Table is marked as crashed
postmeta: 4 clients are using or haven't closed the table properly
terms: 1 client is using or hasn't closed the table properly
term_taxonomy: 3 clients are using or haven't closed the table properly
term_relationships: 2 clients are using or haven't closed the table properly

What should I do¿?