docs: add show tasks doc and task history examples

docs/cn/sql-reference/10-sql-commands/00-ddl/04-task/01-ddl-create_task.md

@@ -208,4 +208,19 @@ AS
  GROUP BY product_category;
 ```
 
-本例创建名为 `cache_enabled_task` 的任务，带启用查询结果缓存的**会话参数**，每 **5 分钟**运行一次，使用 **analytics** 计算集群。会话参数 **`enable_query_result_cache = 1`** 与 **`query_result_cache_min_execute_secs = 5`** 置于所有其他参数之后，为执行时间 ≥5 秒的查询启用缓存，若底层数据未变，可**提升**后续执行的**性能**。
+本例创建名为 `cache_enabled_task` 的任务，带启用查询结果缓存的**会话参数**，每 **5 分钟**运行一次，使用 **analytics** 计算集群。会话参数 **`enable_query_result_cache = 1`** 与 **`query_result_cache_min_execute_secs = 5`** 置于所有其他参数之后，为执行时间 ≥5 秒的查询启用缓存，若底层数据未变，可**提升**后续执行的**性能**。
+
+### 查看任务运行历史
+
+使用 `TASK_HISTORY()` 表函数查看任务何时、如何运行：
+
+```sql
+SELECT *
+FROM TASK_HISTORY(
+  TASK_NAME    => 'daily_sales_summary',
+  RESULT_LIMIT => 20
+)
+ORDER BY scheduled_time DESC;
+```
+
+更多参数（如按时间范围或 DAG 的根任务 ID 过滤）参见 [TASK HISTORY](../../../20-sql-functions/17-table-functions/task_histroy.md)。

docs/cn/sql-reference/10-sql-commands/00-ddl/04-task/05-show-tasks.md

@@ -0,0 +1,64 @@
+---
+title: SHOW TASKS
+sidebar_position: 5
+---
+import FunctionDescription from '@site/src/components/FunctionDescription';
+
+<FunctionDescription description="版本引入或更新: v1.2.900"/>
+
+列出当前角色可见的任务。
+
+**注意：** 该命令默认仅在 Databend Cloud 可用；自建部署需配置 Cloud Control 才能查询任务。
+
+## 语法
+
+```sql
+SHOW TASKS [LIKE '<pattern>' | WHERE <expr>]
+```
+
+| 参数 | 说明 |
+|-----------|-------------|
+| LIKE      | 使用区分大小写的模式匹配（含 `%` 通配符）过滤任务名。 |
+| WHERE     | 对输出列使用表达式过滤结果。 |
+
+### 输出列
+
+`SHOW TASKS` 返回以下列：
+
+- `created_on`: 任务创建时间戳。
+- `name`: 任务名称。
+- `id`: 内部任务 ID。
+- `owner`: 拥有该任务的角色。
+- `comment`: 可选备注。
+- `warehouse`: 关联的计算集群。
+- `schedule`: 间隔或 CRON 调度（如有）。
+- `state`: 当前状态（`Started` 或 `Suspended`）。
+- `definition`: 任务执行的 SQL。
+- `condition_text`: 任务的 WHEN 条件。
+- `after`: DAG 中上游任务的逗号分隔列表。
+- `suspend_task_after_num_failures`: 连续失败多少次后自动挂起。
+- `error_integration`: 失败通知使用的集成名称。
+- `next_schedule_time`: 下一次计划运行的时间戳。
+- `last_committed_on`: 任务定义上次更新的时间戳。
+- `last_suspended_on`: 上次挂起时间（如有）。
+- `session_parameters`: 任务运行时应用的会话参数。
+
+## 示例
+
+列出当前角色可见的全部任务：
+
+```sql
+SHOW TASKS;
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+| created_on                 | name          | id   | owner         | comment | warehouse | schedule                        | state    | definition                                | condition_text         | after   | suspend_task_after_num_failures     | error_integration | next_schedule_time         | last_committed_on          | last_suspended_on          | session_parameters                                  |
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+| 2024-07-01 08:00:00.000000 | ingest_sales  | 101  | ACCOUNTADMIN  | NULL    | etl_wh    | CRON 0 5 * * * * TIMEZONE UTC   | Started  | COPY INTO sales FROM @stage PATTERN '.*'  | STREAM_STATUS('s1')    |         |                                   3 | slack_errors      | 2024-07-01 08:05:00.000000 | 2024-07-01 08:00:00.000000 | NULL                       | {"enable_query_result_cache":"1"}                   |
+| 2024-07-01 09:00:00.000000 | hourly_checks | 102  | SYSADMIN      | health  | etl_wh    | INTERVAL 3600 SECOND            | Suspended | CALL run_health_check()                   |                        | ingest_sales |                                NULL | NULL              | 2024-07-01 10:00:00.000000 | 2024-07-01 09:05:00.000000 | 2024-07-01 09:10:00.000000 | {"query_result_cache_min_execute_secs":"5"}         |
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+```
+
+仅展示名称以 `ingest_` 开头的任务：
+
+```sql
+SHOW TASKS LIKE 'ingest_%';
+```

docs/cn/sql-reference/10-sql-commands/00-ddl/04-task/index.md

@@ -17,8 +17,10 @@ title: 任务（Task）
 
 | 命令 | 描述 |
 |---------|-------------|
+| [SHOW TASKS](05-show-tasks.md) | 查看当前角色可见的任务 |
+| [TASK HISTORY](../../../20-sql-functions/17-table-functions/task_histroy.md) | 查看一个或多个任务的运行历史 |
 | [TASK ERROR INTEGRATION PAYLOAD](10-task-error-integration-payload.md) | 显示任务错误通知的错误载荷格式 |
 
 :::note
 Databend 中的任务允许您安排和自动化 SQL 命令在指定间隔执行。
-:::
+:::

docs/en/sql-reference/10-sql-commands/00-ddl/04-task/01-ddl-create_task.md

@@ -210,3 +210,18 @@ AS
 ```
 
 In this example, a task named `cache_enabled_task` is created with **session parameters** that enable query result caching. The task is scheduled to run **every 5 minutes** and uses the **analytics** warehouse. The session parameters **`enable_query_result_cache = 1`** and **`query_result_cache_min_execute_secs = 5`** are specified **after all other task parameters**, enabling the query result cache for queries that take at least 5 seconds to execute. This can **improve performance** for subsequent executions of the same task if the underlying data hasn't changed.
+
+### View Task Run History
+
+Use the `TASK_HISTORY()` table function to see when and how tasks ran:
+
+```sql
+SELECT *
+FROM TASK_HISTORY(
+  TASK_NAME   => 'daily_sales_summary',
+  RESULT_LIMIT => 20
+)
+ORDER BY scheduled_time DESC;
+```
+
+See [TASK HISTORY](../../../20-sql-functions/17-table-functions/task_histroy.md) for all options, including filtering by time range or root task ID in a DAG.

docs/en/sql-reference/10-sql-commands/00-ddl/04-task/05-show-tasks.md

@@ -0,0 +1,64 @@
+---
+title: SHOW TASKS
+sidebar_position: 5
+---
+import FunctionDescription from '@site/src/components/FunctionDescription';
+
+<FunctionDescription description="Introduced or updated: v1.2.900"/>
+
+Lists the tasks that are visible to the current role.
+
+**NOTICE:** This command works out of the box only in Databend Cloud. For self-hosted deployments, configure Cloud Control to query tasks.
+
+## Syntax
+
+```sql
+SHOW TASKS [LIKE '<pattern>' | WHERE <expr>]
+```
+
+| Parameter | Description |
+|-----------|-------------|
+| LIKE      | Filters task names using case-sensitive pattern matching with the `%` wildcard. |
+| WHERE     | Filters the result set using an expression on the output columns.               |
+
+### Output
+
+`SHOW TASKS` returns the following columns:
+
+- `created_on`: Timestamp when the task was created.
+- `name`: Task name.
+- `id`: Internal task identifier.
+- `owner`: Role that owns the task.
+- `comment`: Optional comment.
+- `warehouse`: Warehouse assigned to the task.
+- `schedule`: Interval or CRON schedule, when present.
+- `state`: Current status (`Started` or `Suspended`).
+- `definition`: SQL the task runs.
+- `condition_text`: WHEN condition for the task.
+- `after`: Comma-separated list of upstream tasks in a DAG.
+- `suspend_task_after_num_failures`: Number of consecutive failures before suspension.
+- `error_integration`: Notification integration for failures.
+- `next_schedule_time`: Timestamp of the next scheduled run.
+- `last_committed_on`: Timestamp when the task definition was last updated.
+- `last_suspended_on`: Timestamp when the task was last suspended, if any.
+- `session_parameters`: Session parameters applied when the task runs.
+
+## Examples
+
+List all tasks available to the current role:
+
+```sql
+SHOW TASKS;
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+| created_on                 | name          | id   | owner         | comment | warehouse | schedule                        | state    | definition                                | condition_text         | after   | suspend_task_after_num_failures     | error_integration | next_schedule_time         | last_committed_on          | last_suspended_on          | session_parameters                                  |
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+| 2024-07-01 08:00:00.000000 | ingest_sales  | 101  | ACCOUNTADMIN  | NULL    | etl_wh    | CRON 0 5 * * * * TIMEZONE UTC   | Started  | COPY INTO sales FROM @stage PATTERN '.*'  | STREAM_STATUS('s1')    |         |                                   3 | slack_errors      | 2024-07-01 08:05:00.000000 | 2024-07-01 08:00:00.000000 | NULL                       | {"enable_query_result_cache":"1"}                   |
+| 2024-07-01 09:00:00.000000 | hourly_checks | 102  | SYSADMIN      | health  | etl_wh    | INTERVAL 3600 SECOND            | Suspended | CALL run_health_check()                   |                        | ingest_sales |                                NULL | NULL              | 2024-07-01 10:00:00.000000 | 2024-07-01 09:05:00.000000 | 2024-07-01 09:10:00.000000 | {"query_result_cache_min_execute_secs":"5"}         |
++----------------------------+---------------+------+---------------+---------+-----------+---------------------------------+----------+-------------------------------------------+------------------------+---------+-------------------------------------+-------------------+----------------------------+----------------------------+----------------------------+---------------------------------------------------+
+```
+
+Show only tasks whose names start with `ingest_`:
+
+```sql
+SHOW TASKS LIKE 'ingest_%';
+```

docs/en/sql-reference/10-sql-commands/00-ddl/04-task/index.md

@@ -17,6 +17,8 @@ This page provides a comprehensive overview of task operations in Databend, orga
 
 | Command | Description |
 |---------|-------------|
+| [SHOW TASKS](05-show-tasks.md) | Lists tasks visible to the current role |
+| [TASK HISTORY](../../../20-sql-functions/17-table-functions/task_histroy.md) | Shows run history for one or more tasks |
 | [TASK ERROR INTEGRATION PAYLOAD](10-task-error-integration-payload.md) | Shows the error payload format for task error notifications |
 
 :::note