我正在尝试在一个查询中联接4个表，它可以编译，但是返回或不设置任何值。以下是我写的《 QUERY》。请帮忙
UPDATE tbl_venue_charges AS VC
JOIN tbl_usr_training_master AS TM ON TM.trai_master_id = VC.vnu_chrg_id
JOIN tbl_trainer_participant_expenses AS TPE ON TPE.trpex_id = VC.vnu_chrg_id
JOIN tbl_usr_training_master2 AS UTM ON UTM.trai_master2_id = VC.vnu_chrg_id
JOIN tbl_travelling_expenses AS TEX ON TEX.trv_exp_id = VC.vnu_chrg_id
SET VC.trai_master_id = TM.trai_master_id AND
VC.trpex_id = TPE.trpex_id,
VC.trai_master2_id = UTM.trai_master2_id,
VC.trv_exp_id = TEX.trv_exp_id;