I'm surprised that you get any result at all because there's no tables with aliases "b" and "d" in the FROM clause. It's better to use two or more letter meanigfull aliases instead of a,b,c,d, e.t.c which make the query unreadable.

>
>I have this SELECT Statement,
>

>SELECT distinct c_cod_art, c.c_descri, b.c_nome,
>SUM (CASE WHEN d.n_ent_sai =  1 THEN n_quant_1 ELSE 0 END)  as ENT,
>SUM (CASE WHEN d.n_ent_sai =  2 THEN n_quant_1 ELSE 0 END)  as SAI
>from tbl_gc_movimentosstk a
>left join tbl_gc_Artigos c on c.c_codigo=a.c_cod_art
>group by c_cod_art, c.c_descri, b.c_nome
>order by c_cod_art
>

>
>and it gives two rows for the same c_cod_art, one for ENT, and one for SAI, any chance to join them only in one row.
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>