Update aggregate-histogram.md

databendlabs · Jan 21, 2025 · 07f23b7 · 07f23b7
1 parent 1ab89c7
commit 07f23b7
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diff --git a/...en/sql-reference/20-sql-functions/07-aggregate-functions/aggregate-histogram.md b/...en/sql-reference/20-sql-functions/07-aggregate-functions/aggregate-histogram.md
@@ -12,7 +12,9 @@ Generates a data distribution histogram using an "equal height" bucketing strate
 ```sql
 HISTOGRAM(<expr>)
 
+-- The following two forms are equivalent:
 HISTOGRAM(<max_num_buckets>)(<expr>)
+HISTOGRAM(<expr> [, <max_num_buckets>])
 ```
 
 | Parameter         | Description                                                                         |
@@ -99,6 +101,8 @@ This example shows how `HISTOGRAM(2)` groups c_int values into two buckets:
 
 ```sql
 SELECT HISTOGRAM(2)(c_int) FROM histagg;
+-- Or
+SELECT HISTOGRAM(c_int, 2) FROM histagg;
 
 ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
 │                                                  histogram(2)(c_int)                                                  │