diff --git a/CHANGES.md b/CHANGES.md
index 29e605beb2..460fdd064f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -125,8 +125,8 @@ Release Notes.
 * Add `Column.shardingKeyIdx` for column definition for BanyanDB.
 
 ```
-Sharding key is used to group time series data per metric of one entity in one place (same sharding or same 
-column for column-oriented database).
+Sharding key is used to group time series data per metric of one entity in one place (same sharding and/or same 
+row for column-oriented database).
 For example,
 ServiceA's traffic gauge, service call per minute, includes following timestamp values, then it should be sharded by service ID
 [ServiceA(encoded ID): 01-28 18:30 values-1, 01-28 18:31 values-2, 01-28 18:32 values-3, 01-28 18:32 values-4]
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/annotation/Column.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/annotation/Column.java
index 17ba2e0422..077fdfe6dd 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/annotation/Column.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/storage/annotation/Column.java
@@ -102,8 +102,8 @@ public @interface Column {
     AnalyzerType analyzer() default AnalyzerType.OAP_ANALYZER;
 
     /**
-     * Sharding key is used to group time series data per metric of one entity in one place (same sharding or same
-     * column for column-oriented database).
+     * Sharding key is used to group time series data per metric of one entity in one place (same sharding and/or same
+     * row for column-oriented database).
      * For example,
      * ServiceA's traffic gauge, service call per minute, includes following timestamp values, then it should be sharded
      * by service ID