What can i do for removing SINGLE in this select query??

What can i do for removing SINGLE in this select query given below and also NOT USE 'ENDSELECT'??

I have defined g_t_zv7_cachemapping as following ::

DATA : BEGIN OF g_t_zv7_cachemapping OCCURS 0,

kostl LIKE zv7_cachemapping-kostl,

END OF g_t_zv7_cachemapping.

SELECT SINGLE kostl FROM zv7_cachemapping INTO g_t_zv7_cachemapping

WHERE auart = g_t_vbak-auart.

IF sy-subrc = 0 .

.

.

.

ENDIF.