多表连接（从两个表取数，放在一个表里）

PARAMETERS p_cityfr TYPE spfli-cityfrom.
TYPES: BEGIN OF wa,
         carrid   TYPE scarr-carrid,
         carrname TYPE scarr-carrname,
         connid   TYPE spfli-connid,
      END OF wa.
DATA  itab TYPE SORTED TABLE OF wa
                WITH NON-UNIQUE KEY carrid.

SELECT s~carrid, s~carrname, p~connid
       FROM scarr AS s
       LEFT OUTER JOIN spfli AS p ON s~carrid   =  p~carrid
                                  AND p~cityfrom = @p_cityfr
       INTO CORRESPONDING FIELDS OF TABLE @itab.

DELETE itab WHERE connid <> '0000'.

cl_demo_output=>display( itab ).