Concatenate conditions in Where Clause in Select_analysis gives an empty output!

I'm executing this code, but i get an empty output, even if all is right. I don't know if i'm missing something,

I'm using Arcpy, Python, Arcgis 10.1

whereclause1 = '"Parcelles_class.OBJECTID" = 1'
whereclause2 = '"output_table1.src_OBJECTID" = 1'
arcpy.Select_analysis("Join_Output_3","target_neighbor_parcel",whereclause1 + "AND" + whereclause2)