SELECT
    b.fnumber groupstandard_number,
    c.fid group_id,
    a.fsupplierid supplier_id,
    a.fstandardid groupstandard_id
    FROM t_bd_suppliergroupdetail@sys a
LEFT JOIN t_bd_spgroupstandard b on a.fstandardid = b.fid
LEFT JOIN t_bd_suppliergroup c on a.fgroupid = c.fid