Fix docs

docs/en/engines/table-engines/mergetree-family/mergetree.md

@@ -994,30 +994,36 @@ They can be used for prewhere optimization only if we enable `set allow_statisti
 - `MinMax`
 
     The minimum and maximum column value which allows to estimate the selectivity of range filters on numeric columns.
+    Supported data types: (U)Int*, Float*, Decimal(*), Boolean and Date*.
 
 - `TDigest`
 
     [TDigest](https://github.com/tdunning/t-digest) sketches which allow to compute approximate percentiles (e.g. the 90th percentile) for numeric columns.
+    Supported data types: (U)Int*, Float*, Decimal(*), Boolean and Date*.
 
 - `Uniq`
 
     [HyperLogLog](https://en.wikipedia.org/wiki/HyperLogLog) sketches which provide an estimation how many distinct values a column contains.
+    Supported data types: (U)Int*, Float*, Decimal(*), Boolean, Date* and (Fixed)String.
 
 - `count_min`
 
     [Count-min](https://en.wikipedia.org/wiki/Count%E2%80%93min_sketch) sketches which provide an approximate count of the frequency of each value in a column.
+    Supported data types: (U)Int*, Float*, Decimal(*), Boolean, Date* and (Fixed)String.
 
-#### Supported Data Types {#supported-data-types}
+Note that all statistics types support `LowCardinality` and `Nullable` modifiers to data types.
 
-| Data Type / Statistics  | count_min | minmax | tdigest | uniq |
-|-------------------------|-----------|--------|---------|------|
-| Integer types           | ✔         | ✔      | ✔       | ✔    |
-| Floating-point numbers  | ✔         | ✔      | ✔       | ✔    |
-| Boolean                 | ✔         | ✔      | ✔       | ✔    |
-| Strings                 | ✔         | ✗      | ✗       | ✔    |
-| Dates                   | ✔         | ✔      | ✔       | ✔    |
+#### Supported operations of Column Statistics {#supported-operations-of-column-statistics}
+
+|           | Equals  | Range |
+|-----------|---------|-------|
+| count_min | ✔       | ✔     |
+| MinMax    | ✔       | ✔     |
+| TDigest   | ✔       | ✔     |
+| Uniq      | ✔       | ✗     |
+
+Please note that operation range represents >, >=, <, <=.
 
-You can also add `LowCardinality` and `Nullable` modifiers to the data types.
 
 
 ## Column-level Settings {#column-level-settings}