q tal,
field-symbols: <fs_tabla> like line of t_interna.
loop at t_interna assigning <fs_tabla>.
<fs_tabla>-campo = 'VALOR_NUEVO'.
endloop.
o
read table t_interna assigning <fs_tabla> with key CONDICIONES.
if sy-subrc = 0.
<fs_tabla>-campo = 'VALOR_NUEVO'.
endif.
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