" tb_lab_record.lr_id as lrId, tb_lab_record.lt_id as ltId, tb_lab_record.uc_id as ucId, tb_lab_record.status,tb_lab_record.refuse_reason as refuseReason,tb_lab_record.check_time as checkTime,tb_lab_record.create_time as createTime "+
"FROM "+
" tb_lab "+
" INNER JOIN tb_lab_time ON tb_lab.lab_id = tb_lab_time.lab_id "+
" INNER JOIN tb_lab_record ON tb_lab_time.lt_id = tb_lab_record.lt_id "+
" INNER JOIN tb_user "+
" INNER JOIN tb_user_course ON tb_user.u_id = tb_user_course.u_id "+