Learn T-SQL With Erik: Columnstore Modifications

Description:
## Summary
In this video, I delve into the often-overlooked side effects of modifying columnstore indexes in SQL Server. While columnstore indexes are celebrated for their performance benefits in read-heavy scenarios, I highlight the potential pitfalls of write operations, such as deletes and updates. I demonstrate how these modifications can accumulate over time, degrading query performance and increasing unnecessary I/O operations. By walking through practical examples and SQL commands, I show how to manage and mitigate these issues, including the use of index reorganization and rebuilds to optimize columnstore performance.

## Chapters
- **00:00:00** - Introduction
- **00:01:02** - Columnstore Modifications
- **00:05:01** - Delete Operations
- **00:07:04** - Segment Read Analysis
- **00:09:07** - Rebuild Columnstore
- **00:10:25** - Inefficient Inserts
- **00:12:27** - Delta Store Overview
- **00:14:00** - Update Operations
- **00:16:14** - Uncompressed Row Groups
- **00:17:10** - Columnstore Maintenance
- **00:18:49** - Conclusion

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