public static string SqlLiteralTimestamp(this DateTime?d, SqlTimestampOptions options) => d.HasValue ? d.Value.SqlLiteralTimestamp(options) : SqlOptions.SqlNullString;
public static string SqlLiteralTimestamp(this DateTime d, SqlTimestampOptions options) => d.SqlLiteralTimestamp(options.MilliSecondsPrecision, options.LiteralPrefix, options.LiteralSuffix);