Use the column checkboxes to build your query. Header columns sets/unsets all columns
SELECT MANDT, PM_APPL, WORKPAPER, ABAPNAME, ABAPFORM, FORM, AR_OBJECT, PM_DELTA_P, OPER_STAT, MAT_STAT, LODR_FLAG, RUDR_FLAG, PDF_FORM, JOB_CARD, JC_FORM, ORD_HEAD_L, ORD_HEAD_S, PERMIT, PARTN_ORD, PARTN_NOT, CLASS, OP_HEAD_L, OP_HEAD_S, OP_SERVICE, OP_MAT, OP_PRT, TIMETICKET, OBJECTLIST, CONF, NOTIF_HDR, BREAKDOWN, MAIN_TASK, NOT_ITEMS, INSPECTION, SAFETY_PL, FLG_RMDT, FLG_RMDB FROM T390