Use the column checkboxes to build your query. Header columns sets/unsets all columns
SELECT MANDT, TABNR, TABSEQNR, CHOICE_NO, INSTITUTION, COURSE, SC_OBJID, CAMPUS, FACULTY, DECISION, REPLY, CONDITIONS, ENTRY_DATE, CHOICE_CANCEL, AEDTM_UCAS, UCAS_ACTION, SUBSTITUTION, AMENDMENT, PREV_COURSE, CONF_STATUS, CONF_HIST, ENTRY_POINT, INTERV_PRIO, HOME_INDIC, AEDTM_INST, UNAME_INST, COURSE_INST, CAMPUS_INST, ENTRY_MONTH_INST, ENTRY_YEAR_INST, ENTRY_POINT_INST, TRANSACTION_INST, DECISION_INST, CONDITIONS_INST1, CONDITIONS_INST2, CONDITIONS_INST3, ADJ_STATUS, INTERVIEW_DATE, INTERVIEW_RESP, YR_APPLIED, APPL_SCHEME_CODE, DEFER_ENTRY, INSTDESCDATE, REFDATE, OFFER_LEVEL, POTENTIAL_LEVEL, CWD_FLAG_T, CWD_DATE_T FROM HRT1783