[fix] Remove count function

docs/content/primary-key-table/merge-engine/aggregation.md

@@ -71,13 +71,13 @@ Current supported aggregate functions and data types are:
   It supports DECIMAL, TINYINT, SMALLINT, INTEGER, BIGINT, FLOAT, and DOUBLE data types.
 
 ### count
-In scenarios where counting rows that match a specific condition is required, you can use the SUM function to achieve this. By expressing a condition as a Boolean value (TRUE or FALSE) and converting it into a numerical value, you can effectively count the rows. In this approach, TRUE is converted to 1, and FALSE is converted to 0.
+  In scenarios where counting rows that match a specific condition is required, you can use the SUM function to achieve this. By expressing a condition as a Boolean value (TRUE or FALSE) and converting it into a numerical value, you can effectively count the rows. In this approach, TRUE is converted to 1, and FALSE is converted to 0.
 
-For example, if you have a table orders and want to count the number of rows that meet a specific condition, you can use the following query:
-```sql
-SELECT SUM(CASE WHEN condition THEN 1 ELSE 0 END) AS count
-FROM orders;
-```
+  For example, if you have a table orders and want to count the number of rows that meet a specific condition, you can use the following query:
+  ```sql
+  SELECT SUM(CASE WHEN condition THEN 1 ELSE 0 END) AS count
+  FROM orders;
+  ```
 
 
 ### max