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Alex Rivera
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In this MySQL table definition: CREATE TABLE groups ( ug_main_grp_id smallint NOT NULL default '0', ug_uid smallint default NULL, ug_grp_id smallint default NULL, KEY (ug_main_grp_id) ); What does the KEY keyword mean? It's not a primary key, it's not a foreign key, so is it just an index? If so, what is so special about this type of index created with KEY ?
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