Use the column checkboxes to build your query. Header columns sets/unsets all columns
SELECT MANDT, SSOUR, VRSIO, SPMON, SPTAG, SPWOC, SPBUP, KONOB, VKORG, VTWEG, KUNNR, PERIV, VWDAT, BASME, AEMENGE, KCREQ, KCQTY, KUDMD, KLTBK, KCUBL, KOFLG FROM S996