Update gen-random-uuid.md

Author: BohuTANG

docs/en/sql-reference/20-sql-functions/13-uuid-functions/gen-random-uuid.md

@@ -2,7 +2,7 @@
 title: GEN_RANDOM_UUID
 ---
 
-Generates a random UUID based on v4.
+Generates a random UUID based on version 7, starting from version 1.2.658. Previously, this function generated UUIDs based on version 4.
 
 ## Syntax
 
@@ -14,14 +14,37 @@ GEN_RANDOM_UUID()
 
 - [UUID](uuid.md)
 
+## Why Use UUID v7?
+
+- **Time-Based Ordering**: UUID v7 includes a timestamp, allowing events or records to be ordered chronologically by the time they were created. This is especially useful when you need to track the sequence of actions.
+  
+- **Chronological Sorting**: UUID v7 ensures that UUIDs are sorted by creation time, which is ideal for scenarios where sorting events by time is necessary, such as event logging or maintaining audit trails.
+
+## Version Information
+
+- Version 1.2.658 and later: UUID version upgraded from v4 to v7.
+- Version prior to 1.2.658: UUID generation was based on v4.
+
 ## Examples
 
+In an application where events are logged, maintaining the correct sequence of actions is essential. UUID v7 ensures that each event is time-ordered, making it easy to track actions chronologically.
+
 ```sql
-SELECT GEN_RANDOM_UUID(), UUID();
-
-┌─────────────────────────────────────────────────────────────────────────────┐
-│           gen_random_uuid()          │                uuid()                │
-├──────────────────────────────────────┼──────────────────────────────────────┤
-│ f88e7efe-1bc2-494b-806b-3ffe90db8f47 │ f88e7efe-1bc2-494b-806b-3ffe90db8f47 │
-└─────────────────────────────────────────────────────────────────────────────┘
-```
+-- Log a user logging in
+SELECT GEN_RANDOM_UUID(), 'User logged in' AS event, CURRENT_TIMESTAMP AS event_time;
+
+-- Log a user making a purchase
+SELECT GEN_RANDOM_UUID(), 'User made a purchase' AS event, CURRENT_TIMESTAMP AS event_time;
+```
+
+The results from these queries might look like this:
+```sql
+┌──────────────────────────────────────────────────────────────────────────────────────────┐
+│           gen_random_uuid()          │         event        │         event_time         │
+├──────────────────────────────────────┼──────────────────────┼────────────────────────────┤
+│ 019329e6-26a2-7b01-b9f5-1c3c02600578 │ User logged in       │ 2024-11-14 08:59:29.313906 │
+│ 019329e6-329e-73c3-b0a8-a413ce298607 │ User made a purchase │ 2024-11-14 08:59:32.381497 │
+└──────────────────────────────────────────────────────────────────────────────────────────┘
+```
+
+Notice that the `gen_random_uuid()` values are generated in the order that the events occurred, making it easy to maintain chronological order.