Lỗi: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'group by mahh' at line 12

ma_thuoc	ten_thuoc	so_dang_ky	ten_hoat_chat	nong_do_ham_luong	nha_san_xuat	nuoc_san_xuat	nha_nhap_khau	quy_cach_dong_goi	dang_bao_che	don_vi_dong_goi_nn	gia_ban_le	so_lo	han_dung	so_luong_nhap	so_luong_ban	so_luong_ton	don_vi_bthuoc_cho_csbl	so_hoa_don_mua_thuoc	ngay_nhap	ngay_ban	ma_co_so_ban_le	ma_co_so_ban_buon