Trong qu\u00e1 tr\u00ecnh code, s\u1ebd c\u00f3 nhi\u1ec1u l\u00fac b\u1ea1n c\u1ea7n nh\u1eefng x\u1eed l\u00fd trong background \u0111\u1ec3 g\u1eedi mail hay ch\u1ea1y batch, hay \u0111\u01a1n gi\u1ea3n l\u00e0 x\u1eed l\u00fd database, \u2026 h\u00e3y s\u1eed d\u1ee5ng h\u00e0m exec nh\u01b0 d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n