Use the selection criteria in sap abap

SELECT * FROM SBOOK.                 
CHECK: SBOOK-CARRID = 'LH' AND     
                SBOOK-CONNID = '0400'.      
ENDSELECT.                              

SELECT * FROM SBOOK                   
WHERE CARRID = 'LH' AND             
      CONNID = '0400'.              
ENDSELECT.