sql指令錯誤：select * from adv where type='a01' and (d1<=getdate() and d2>=getdate()) order by sort

ERROR [42000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Resource ID : 2. The session limit for the database is 600 and has been reached. For more information, see https://go.microsoft.com/fwlink/?linkid=2323004. ERROR [01000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Changed language setting to us_english. ERROR [01000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Changed database context to 'g0330'. ERROR [01000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Changed database context to 'g0330'. ERROR [01000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Changed language setting to us_english. ERROR [42000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Resource ID : 2. The session limit for the database is 600 and has been reached. For more information, see https://go.microsoft.com/fwlink/?linkid=2323004.