[最佳答案] C style comments are standard in SQL 2003 and SQL 2008 (but not in SQL 1999 or before). The following DBMS all support C style comments: Informix PostgreSQL MySQL Oracle DB2 Sybase Ingres Microsoft SQL Server SQLite (3.7.2 and later) Teradata and Aster That is not every possible DBMS, but it is more or less every major SQL DBMS. (I'll willingly add notes about any other DBMS that does - or does not - support C style comments.) The SQL 2003 standard documents comment notations thus: <comment&