docs: update range query time slot caculate (#726)

GreptimeTeam · Dec 25, 2023 · 2d1627c · 2d1627c
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diff --git a/docs/public/align_greater_than_range.png b/docs/public/align_greater_than_range.png
diff --git a/docs/public/align_less_than_range.png b/docs/public/align_less_than_range.png
diff --git a/docs/v0.4/en/reference/sql/range.md b/docs/v0.4/en/reference/sql/range.md
@@ -218,18 +218,18 @@ SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO '2023-01-01T00:00:0
 
 If you want to query data for a specific time range, you can specify the timestamp using the `TO` keyword.
 For example, to query the daily minimum value of `val` between `00:45` and `06:45`,
-you can use `2023-01-01T06:45:00` as the `TO` option along with a `6h` range.
+you can use `2023-01-01T00:45:00` as the `TO` option along with a `6h` range.
 
 ```sql
-SELECT ts, host, min(val) RANGE '6h' FROM host ALIGN '1d' TO '2023-01-01T06:45:00';
+SELECT ts, host, min(val) RANGE '6h' FROM host ALIGN '1d' TO '2023-01-01T00:45:00';
 ```
 
 ```sql
 +---------------------+-------+----------------------------------+
 | ts                  | host  | MIN(host.val) RANGE 6h FILL NULL |
 +---------------------+-------+----------------------------------+
-| 2023-01-02 06:45:00 | host1 |                                1 |
-| 2023-01-02 06:45:00 | host2 |                                3 |
+| 2023-01-02 00:45:00 | host1 |                                1 |
+| 2023-01-02 00:45:00 | host2 |                                3 |
 +---------------------+-------+----------------------------------+
 ```
 

diff --git a/docs/v0.4/en/user-guide/query-data/sql.md b/docs/v0.4/en/user-guide/query-data/sql.md
@@ -186,14 +186,14 @@ The Response is shown below:
 The origin time range window steps forward and backward in the time series to generate all time range windows.
 In the example above, the origin alignment time is set to `2023-12-01T00:00:00`, which is also the end time of the origin time window.
 
-The `RANGE` option, along with the origin alignment time, defines the origin time range window that starts from `origin alignment timestamp - range` and ends at `origin alignment timestamp`.
+The `RANGE` option, along with the origin alignment time, defines the origin time range window that starts from `origin alignment timestamp` and ends at `origin alignment timestamp + range`.
 
 The `ALIGN` option defines the query resolution steps.
 It determines the calculation steps from the origin time window to other time windows.
 For example, with the origin alignment time `2023-12-01T00:00:00` and `ALIGN '5s'`, the alignment times are `2023-11-30T23:59:55`, `2023-12-01T00:00:00`, `2023-12-01T00:00:05`, `2023-12-01T00:00:10`, and so on.
 
-These time windows are left-open and right-closed intervals
-that satisfy the condition `(alignment timestamp - range, alignment timestamp]`.
+These time windows are left-closed and right-open intervals
+that satisfy the condition `[alignment timestamp, alignment timestamp + range)`.
 
 The following images can help you understand the time range window more visually:
 

diff --git a/docs/v0.4/zh/reference/sql/range.md b/docs/v0.4/zh/reference/sql/range.md
@@ -216,18 +216,18 @@ SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO '2023-01-01T00:00:0
 
 如果要查询特定时间范围内的数据，也可以使用 `TO` 关键字指定时间戳达到目的。
 例如，要查询 `val` 在 `00:45` 和 `06:45` 之间的每日最小值，
-你可以使用 `2023-01-01T06:45:00` 作为 `TO` 选项以及指定 `6h` 的查询范围。
+你可以使用 `2023-01-01T00:45:00` 作为 `TO` 选项以及指定 `6h` 的查询范围。
 
 ```sql
-SELECT ts, host, min(val) RANGE '6h' FROM host ALIGN '1d' TO '2023-01-01T06:45:00';
+SELECT ts, host, min(val) RANGE '6h' FROM host ALIGN '1d' TO '2023-01-01T00:45:00';
 ```
 
 ```sql
 +---------------------+-------+----------------------------------+
 | ts                  | host  | MIN(host.val) RANGE 6h FILL NULL |
 +---------------------+-------+----------------------------------+
-| 2023-01-02 06:45:00 | host1 |                                1 |
-| 2023-01-02 06:45:00 | host2 |                                3 |
+| 2023-01-02 00:45:00 | host1 |                                1 |
+| 2023-01-02 00:45:00 | host2 |                                3 |
 +---------------------+-------+----------------------------------+
 ```
 

diff --git a/docs/v0.4/zh/user-guide/query-data/sql.md b/docs/v0.4/zh/user-guide/query-data/sql.md
@@ -184,11 +184,11 @@ ALIGN '5s' TO '2023-12-01T00:00:00' BY (host);
 将初始时间范围窗口在时间序列中向前和向后移动，就生成了所有时间范围窗口。
 在上面的例子中，初始对齐时间被设置为 `2023-12-01T00:00:00`，这也是初始时间窗口的结束时间。
 
-`RANGE` 选项和初始对齐时间定义了初始时间范围窗口，它从 `初始对齐时间 - RANGE` 开始，到 `初始对齐时间` 结束。
+`RANGE` 选项和初始对齐时间定义了初始时间范围窗口，它从 `初始对齐时间` 开始，到 `初始对齐时间 + RANGE` 结束。
 `ALIGN` 选项定义了查询的步频，决定了从初始时间窗口到其他时间窗口的计算步频。
 例如，使用初始对齐时间 `2023-12-01T00:00:00` 和 `ALIGN '5s'`，时间窗口的对齐时间为 `2023-11-30T23:59:55`、`2023-12-01T00:00:00`、`2023-12-01T00:00:05`、`2023-12-01T00:00:10` 等。
 
-这些时间窗口是左开右闭区间，满足条件 `(对齐时间 - 范围, 对齐时间]`。
+这些时间窗口是左闭右开区间，满足条件 `[对齐时间, 对齐时间 + 范围)`。
 
 下方的图片可以帮助你更直观的理解时间范围窗口：