Hi , Stuck on simple task -just write columns belongs to tables PK to separate phisical(not metadata) table. I tried a few codes but always got same error, f.e.: ods _all_ close; ods output  IntegrityConstraints=outputPK; proc contents data=&tableName ; run; ods output close; Waring put's to the log:   WARNING: Output 'IntegrityConstraints' was not created. Make sure that the output object name, label, or path is spelled correctly. Also, verify that the appropriate procedure options are used to produce the requested output object. For example, verify that the NOPRINT option is not used. But "IntegrityConstraints" should be right name for output table: http://support.sas.com/documentation/cdl/en/odsug/61723/HTML/default/viewer.htm#a002649072.htm Same results when I used "describe table constraints" to get PK. When I used "Attributes" instead of "IntegrityConstraints" - code worked ok  and output table,as expected. If there is more clever approach to get PK from physical table - please share, the code should work as quick as possible and return only list of PK columns. Thanks! ... View more