You could do that, but I’m not sure the data will be recreated. If that table is the only one missing, then you could just recreate it. The sql for creating the table is below…you could copy that, past into a text file using notepage, rename the file with a .sql extension and then import it into your database to recreate the table. Again, you won’t have the data, so I assume you would need to re-tag and categorize your posts. I’m just making some assumptions that you can’t get this data back…there may be a way to get these relationships back, but I’ve never experimented with it.
CREATE TABLE IF NOT EXISTS <code>wp_term_relationships</code> (
<code>object_id</code> bigint(20) NOT NULL default '0',
<code>term_taxonomy_id</code> bigint(20) NOT NULL default '0',
<code>term_order</code> int(11) NOT NULL default '0',
PRIMARY KEY (<code>object_id</code>,<code>term_taxonomy_id</code>),
KEY <code>term_taxonomy_id</code> (<code>term_taxonomy_id</code>)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;