SQL Server

SQL Server

Error: 1205 – Transaction Process ID was deadlocked

Fix SQL Server Error 1205 (Deadlock). Learn how to analyze deadlocks using the System Health session, enable Trace Flag 1222, and read Deadlock Graphs to resolve performance issues.
2025.11.29
SQL ServerTroubleshooting
SQL Server

Error 18456 – Login failed for user ‘xxx’

Understand and fix SQL Server Error 18456. See what each State means, how to check the error log in SSMS, and step-by-step solutions for common login failures.
2025.09.28
SQL ServerTroubleshooting
SQL Server

Connection error – The target principal name is incorrect

Why SQL Server shows “The target principal name is incorrect” during TLS, how to diagnose certificate name mismatches and trust issues, and the safest fixes.
2025.09.21
SQL ServerTroubleshooting
SQL Server

Error 7391 – The operation could not be performed because OLE DB provider “MSOLEDBSQL” for linked server “xxx” was unable to begin a distributed transaction.

Learn how to resolve SQL Server error 7391 by enabling MSDTC and understanding distributed transactions. This guide explains the two-phase commit process and provides step-by-step fixes.
2025.08.16
SQL ServerTroubleshooting
SQL Server

Essential Workflow for Software Troubleshooting

This guide outlines a practical, step-by-step approach for troubleshooting software issues.The goal is to improve effici...
2025.08.09
SQL ServerTroubleshooting