thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-09-20 00:30:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update docs

Browse Source
This commit is contained in:
Robert Schulze 2024-07-02 19:59:52 +00:00
parent 9f4e44bfc4
commit 2cefa56f9b
No known key found for this signature in database
GPG Key ID: 26703B55FB13728A
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/en/engines/table-engines/mergetree-family/mergetree.md
View File

@ -993,11 +993,11 @@ They can be used for prewhere optimization only if we enable `set allow_statisti
- `TDigest`
Stores distribution of values from numeric columns in [TDigest](https://github.com/tdunning/t-digest) sketch.
[TDigest](https://github.com/tdunning/t-digest) sketches which allow to compute approximate percentiles (e.g. the 90th percentile) for numeric columns.
- `Uniq`
Estimate the number of distinct values of a column by HyperLogLog.
[HyperLogLog](https://en.wikipedia.org/wiki/HyperLogLog) sketches which provide an estimation how many distinct values a column contains.
## Column-level Settings {#column-level-settings}