SQL Server 2016 End of Life: Upgrade to 2022 or 2025 for Security and Compliance

📢 Important update for anyone still on SQL Server 2016: end of life is here. No patches. No security updates. 📝 Upgrading to SQL Server 2022/2025 is no longer optional—it’s essential.

💡 Day 6 of 365 – SQL Server Installation Best Practices Installing SQL Server correctly is the foundation for a stable and high-performing environment. Here are some best practices I follow: 🔹 Separate Data, Log, and Temp DB Files – Helps reduce I/O contention. 🔹 Use a Dedicated Service Account – Improves security and manageability. 🔹 Set Max Memory and Max Degree of Parallelism – Prevents resource bottlenecks. 🔹 Install Latest Service Packs & Cumulative Updates – Ensures security and stability. 🔹 Configure Temp DB Properly – Multiple data files, pre-sized to avoid auto-growth. 🔹 Enable Instant File Initialization – Reduces data file creation and growth time. 💡 Tip: Document your installation choices—they are invaluable for future troubleshooting or audits. For DBAs: What’s your most important installation best practice? #SQLServer #SQLDBA #DatabaseAdministrator #AzureSQL #DBATips #DataEngineering

As a SQL Server DBA, one of the most critical responsibilities is ensuring data safety and recoverability. A strong backup strategy can save organizations from data loss caused by hardware failure, human error, or unexpected disasters. Here is the basic backup strategy every DBA should implement: 🔹 Full Backup Creates a complete backup of the entire database. 🔹 Differential Backup Captures only the changes made since the last full backup. 🔹 Transaction Log Backup Backs up the transaction log to allow point-in-time recovery. 💡 Best Practice I Follow: Full Backup → Daily Differential Backup → Every 6 hours Transaction Log Backup → Every 15 minutes This ensures minimal data loss and faster recovery during critical situations. 📌 Pro Tip: Always test your backups by performing restore operations regularly. A backup is useless unless it can be restored successfully. #SQLServer #SQLDBA #DatabaseAdministration #BackupAndRecovery #DataProtection #TechCareers #DBACommunity #LinkedInLearning

Hi DBA's Microsoft released security updates for SQL 2025, 2022, 2019, 2017 and 2016. "Fixes a potential SQL injection vulnerability by removing an internal system stored procedure" "Fixes an elevation of privilege vulnerability in the version upgrade process for merge replication" "This hotfix blocks the ALTER USER operation if the target login is the system Administrator account" As always, test these properly on you non-Prod environment before deploying it on Prod. We've seen in the past where updates are retracted, which makes it so much more important to test. *UPDATE* In addition to the security updates, SQL 2025 CU3 and SQL 2022 CU24 updates were released. #SQLSERVER #SQLDBA https://lnkd.in/dmV53Rzw

End of Extended Support for SQL Server 2016 is approaching on 14 July 2026. Once extended support ends, you lose Security updates ,bug fixes ,compliance and regulatory support. Mainstream support already ended on 13 July 2021.Running SQL 2016 beyond these dates increases risk and operational overhead. If you're planning a move to SQL Server 2022 or 2025, now is the right time to start preparing. Let's talk if you need guidance with your SQL Server 2016 upgrade path... Contact dark_db 😎 #SQL #SQLDBA #UPGRADINGMATTERS

💡 Day 9 of 365 – SQL Server Error Logs: Your First Troubleshooting Tool As a SQL Server DBA, the error logs are your first line of defense when troubleshooting issues. They contain valuable information about: 🔹 Service startup and shutdown events 🔹 Backup and restore operations 🔹 Job failures (via SQL Server Agent) 🔹 Hardware or connectivity errors 🔹 Security and login failures 💡 Tip: Use the built-in function to read error logs quickly: EXEC xp_readerrorlog 0, 1, N'error'; This lets you filter and identify critical errors efficiently. Pro DBAs always check the error logs before running scripts—it can save hours of troubleshooting. 👉 Quick question for DBAs: Do you archive error logs regularly in your environment? #SQLServer #SQLDBA #DatabaseAdministrator #Troubleshooting #AzureSQL #DBATips

💡 Day 10 of 365 – SQL Server Authentication Modes Security starts with authentication. SQL Server supports two main modes: 🔹 Windows Authentication Uses Active Directory accounts Centralized password management Strong security with Kerberos Recommended for production environments 🔹 SQL Server Authentication Uses SQL logins with usernames and passwords Independent of Windows accounts Useful for legacy applications or cross-platform connections 💡 Tip: Always prefer Windows Authentication when possible. If SQL Authentication is required, enforce strong passwords and expiration policies. Fellow DBAs: Which authentication mode do you mostly use in production, and why? #SQLServer #SQLDBA #DatabaseAdministrator #Security #AzureSQL #DBATips

Still looking at the system databases in SQL Server, and the master database is also one of the critical system databases aside msdb The master database is essentially the brain of the SQL Server instance without it, the server cannot start. It holds all the critical information that defines your environment, including: -Server-level logins & permissions -Database metadata (what databases exist and where) -Server configuration settings -Linked servers & endpoints -System-level stored procedures and messages Some key tables and views to check out: sys.databases, sys.server_principals, sys.configurations. If the master database is unavailable or corrupted, SQL Server cannot even determine which databases exist on the server. Understanding it is fundamental for every SQL Server professional. #SQLServer #DatabaseAdministration #SystemDatabases #TechLearning #DataEngineering

March 2026 Patch Tuesday, @ SQL Server admins, give this a look! 2 Zero Day's Patched, one impacting SQL server escalation: https://lnkd.in/gy9FrfFY Full Patch Tuesday Breakdown: https://lnkd.in/g65VFPZ9

At this point, I think I can call myself a Senior DBA😄 I recently ran into this SQL Server error while working with a SQL Server Agent job: Msg 14234 “The specified '@owner_login_name' is invalid (valid values are returned by sp_helplogins [excluding Windows NT groups]).” At first glance, it might look confusing. After all, if a login can access the SQL Server instance, why would SQL Server complain about it when assigning it as a job owner? The reason is that every SQL Server Agent job must run under a valid server-level login. SQL Server checks the value provided in @owner_login_name against the logins that exist on the instance. If the login: • Does not exist on the server • Is a Windows group • Was deleted but still referenced by the job SQL Server will throw Msg 14234 Why does this validation matter? The job owner determines the security context under which the job executes. When the job runs, SQL Server evaluates the permissions of that login to decide what actions the job can perform on the server. In short, SQL Server Agent jobs must always have a valid login as the owner and dont try to create a job with a log in that dose not exist on the sql server. #SQLServer #ChristainProfessional #IWillAlwaysBeASuccess.