Use the column checkboxes to build your query. Header columns sets/unsets all columns
SELECT MANDT, SNAPSHOT_ID, OBJECT_ID, RB, RB_DATE, RB_ENTITY, RB_ACTIVITY, RB_CREATED_BY, RB_CREATED_ON, RB_CREATED_ON_TM, RB_CHANGED_BY, RB_CHANGED_ON, RB_CHANGED_ON_TM FROM GRFNDMRB