getting big difference in actual number of records and estimated number of records and Operator used tempdb to spill data during execution with spill level 1
![Clustered Columnstore Indexes – part 20 (“TempDB Spills – when memory is not enough”) – Niko Neugebauer Clustered Columnstore Indexes – part 20 (“TempDB Spills – when memory is not enough”) – Niko Neugebauer](https://www.nikoport.com/wp-content/uploads/2013/08/Screen-Shot-2013-08-26-at-12.23.06-AM.png)
Clustered Columnstore Indexes – part 20 (“TempDB Spills – when memory is not enough”) – Niko Neugebauer
![sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange](https://i.stack.imgur.com/8NbYG.png)
sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange
![sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange](https://i.stack.imgur.com/36rQo.png)
sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange
![sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange](https://i.stack.imgur.com/YvJau.png)
sql server - Operator used tempdb to spill data . The estimated row are less than real rows - Database Administrators Stack Exchange
![sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange](https://i.stack.imgur.com/omovH.jpg)
sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange
![sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange sql server - Operator used tempdb to spill data during execution with spill level 2 - Database Administrators Stack Exchange](https://i.stack.imgur.com/mMJgA.jpg)