Selection and display of data.

Hi Gurus.

I have:

Table ztbfi_card

key - BUKRS

key - GSBER

key - BAND

key - DTRECE

key - CDOPER

I want all fields.

Table vbrk

key - vbeln  parametro de tela

FKART          parametro de tela.

I want the fields VBELN AND FKART.

Table KNA1

key - KUNNR parametro de tela.

I want the fields NAME1 AND KUNNR

Table BSEG

key -BUKRS

key -BELNR

key -GJAHR

key -BUZEI

I want the fields ZUONR  and SGTXT.

I need show in my alv the fields and all of ztbfi_card :

I did :

SELECT kunnr

          FROM kna1

          INTO TABLE t_kna1

          WHERE kunnr IN s_kunnr.

   IF sy-subrc <> 0.

     MESSAGE i000(zsd_001).

     v_mark = 'X'.

   ENDIF.

   SELECT vbeln

          fkart

          FROM vbrk

          INTO TABLE t_vbrk

          WHERE vbeln IN s_vbeln

            AND fkart IN s_fkart.

SELECT * FROM ztbfi_card

              INTO TABLE t_ztbfi_card

              WHERE bukrs EQ p_bukrs

                AND gsber IN s_gsber.

1- are the selects correct?

2-How Can I relate this data os different tables?to show in my ALV.

3-In ztbfi_card I don´t use all keys in select because i don´t have their, its problem ?

4-More suggestions.

Thanks.