1054 - Unknown column '3_6' in 'where clause'

SELECT c.portfolio_cat_id, c.parent_id, cd.portfolio_cat_name, cd.portfolio_cat_description FROM portfolio_cat c, portfolio_cat_description cd WHERE c.portfolio_cat_id = cd.portfolio_cat_id AND cd.language_id = FLOOR(1) AND c.portfolio_cat_id = 3_6 AND cd.portfolio_cat_id = 3_6

[TEP STOP]