CREATE TABLE groups (ID INT not null AUTO_INCREMENT, name VARCHAR (200) not null , PRIMARY KEY (ID), INDEX (ID), UNIQUE (ID));
CREATE TABLE comp_group (comp_id INT not null , group_id INT not null , INDEX (group_id));
ALTER TABLE tracking ADD is_group ENUM ('no','yes') DEFAULT 'no' not null;    
ALTER TABLE tracking ADD uemail VARCHAR(100) AFTER is_group;
ALTER TABLE tracking ADD emailupdates varchar(4) AFTER uemail; 
