title: How to add a (primary) key to an existing table using SAP HANA
body: <p>What is the SQL command to add a (primary) key to a table in SAP HANA?</p>
  
  <p>The <a href="https://help.sap.com/saphelp_hanaplatform/helpdata/en/20/d329a6751910149d5fdbc4800f92ff/content.htm#loio20d329a6751910149d5fdbc4800f92ff__sql_alter_table_1alter_table_add_column_clause" rel="noreferrer">ALTER TABLE docu form SAP Library</a> is cryptic to me</p>