Search Articles — Sudonull

https://sudonull.com/cpu-80-diagnostics-in-clickhouse

Tools for finding problematic queries in ClickHouse: system.processes, query_log, EXPLAIN. Diagnostics steps, SQL examples, checklist. Optimize load without downtime.

https://sudonull.com/clickhouse-materialized-views-nuances-and-solutions

How MV Works in ClickHouse? Critical Differences from Classical DBMS, UPDATE/DELETE Limitations and Best Practices. Learn How to Avoid Design Errors.

https://sudonull.com/clickhouse-deduplication-and-losses-in-mv

Analysis of data losses in ClickHouse due to block deduplication in materialized views. Settings insert_deduplicate=0 and deduplicate_blocks_in_dependent_materialized_views=1. Configure lossless storage — read the details.

https://sudonull.com/cte-in-clickhouse-macro-instead-of-optimization

Breaking down why WITH in ClickHouse executes multiple times and how to replace with temporary tables. Code examples, EXPLAIN, comparisons for developers. Speed up queries without pitfalls.

https://sudonull.com/clickhouse-with-airflow-instead-of-postgresql-for-big-data

Learn why Airflow + ClickHouse is displacing PostgreSQL in analytics. Performance comparison, examples for data engineers. Switch to columnar DB for ETL pipelines.

Contact Us - Microsoft Support

https://support.microsoft.com/en-gb/contactus

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Anmelden bei Hotmail | Microsoft Support

https://support.microsoft.com/de-de/accounts-billing/manage/how-to-sign-in-to-hotmail

Microsoft hält immer ein Auge auf ungewöhnliche Anmeldeaktivitäten, nur für den Fall, dass jemand anderes versucht, auf Ihr Konto …

Released: August 2026 Exchange Server Security Updates | Microsoft ...

https://techcommunity.microsoft.com/blog/Exchange/released-august-2026-exchange-server-security-updates/4543951

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

Get ready for Windows 11, version 26H2 - Windows IT Pro Blog

https://techcommunity.microsoft.com/blog/Windows-ITPro-blog/get-ready-for-windows-11-version-26h2/4529367

Jun 19, 2026 · The next annual update for Windows 11 is coming soon and is already available to Windows Insiders! Windows 11, …

Change the refresh rate on your monitor in Windows | Microsoft Support

https://support.microsoft.com/en-us/windows/hardware/display-graphics/change-the-refresh-rate-on-your-monitor-in-windows

Learn how to change the refresh rate for your display in Windows to determine how smoothly motion appears on your screen.

Share your calendar in Outlook | Microsoft Support

https://support.microsoft.com/en-us/outlook/training/share-your-calendar-in-outlook

Training: In Microsoft Outlook, you can share your calendar with other people and open a shared calendar. Learn how in this online …

Copilot App Updates for Personal, Work, and School Accounts

https://support.microsoft.com/en-us/microsoft-365-copilot/learning/changes-microsoft-copilot-app

Copilot app updates bring a simpler, unified experience for personal, work, and school accounts. Learn what's changing, what's …

Close your Outlook.com account | Microsoft Support

https://support.microsoft.com/en-us/accounts-billing/manage/close-your-outlook-com-account

Important When you close your Microsoft account, your email and contacts are deleted from our servers and can't be recovered. If …

Sign in to Microsoft Forms

https://support.microsoft.com/en-us/forms/sign-in-to-microsoft-forms

Create surveys, quizzes, and polls, and easily see results as they come in. Invite others to respond to your form using any web …

Microsoft Support and Recovery Assistant (SaRA) command-line utility ...

https://support.microsoft.com/en-us/servicing/os/windows/docs/2026/03/microsoft-support-and-recovery-assistant-sara-command-line-utility-removal-from-windows

Mar 31, 2026 · Microsoft has officially removed the SaRA utility from all in-support versions of Windows updates released on and after …