Oh, double-hyphen for comments! So maybe that's where SQL got it's comment style from? I'm not sure which SQL spec defined it and what is its overall availabili

Oh, double-hyphen for comments! So maybe that's where SQL got it's comment style from? I'm not sure which SQL spec defined it and what is its overall availability, but it's defined in DB2 and Oracle SQL languages so I'd say it predates the SQL-1992 standard. I think it's also available in MySQL SQL and pgSQL, with a required space between the dashes and the comment text.