SQL cannot be connected, usually the following issues can be resolved. 1. SQL service is started 2. Network connection port (1433) Whether to open 3. Log in to the user's database role
You can't resolve, progress to see the event viewer
If you update SQL, the following issues appear: Event type: Information Event Source: MSSQLServer / MSDE Event Type: No event ID: 5400 Date: 2006-8-13 Event: 8:24:25 User: N / A Computer: liuzj Description: The version of the Microsoft SQL Server 2000 or Microsoft SQL Server 2000 desktop engine (also known as MSDE) contains a vulnerability when you are using this version of WINDOWS. To reduce the vulnerability of your computer, from specific viral attacks, Microsoft SQL Server 2000, MSDE (or simultaneous) TCP / IP and UDP network ports should be disabled. To enable these ports, you must install patch from http://www.microsoft.com/sql/downloads/default.asp, or Microsoft SQL Server 2000 or MSDE's latest service pack.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
