Need help with phpmyadmin

For reasons of consistency in the word count, I want to delete all the (optional) excerpts that had been entered on a site I am working on currently.

So in the table called posts, I want to empty the row called post_excerpt. How should I do that?

I don’t want to delete the row, I just want to empty it.

I don’t know phpmyadmin so well so as to be adventurous with this.

TIA.

Subir