From 413c1ee4ab86c75a5b1aa81a45f963fe5a1179f3 Mon Sep 17 00:00:00 2001 From: dapan1121 <72057773+dapan1121@users.noreply.github.com> Date: Fri, 1 Mar 2024 16:47:55 +0800 Subject: [PATCH] Update 14-stream.md --- docs/en/12-taos-sql/14-stream.md | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/docs/en/12-taos-sql/14-stream.md b/docs/en/12-taos-sql/14-stream.md index 099fa7a963..b8bbd4c154 100644 --- a/docs/en/12-taos-sql/14-stream.md +++ b/docs/en/12-taos-sql/14-stream.md @@ -48,11 +48,9 @@ window_clause: { `SESSION` indicates a session window, and `tol_val` indicates the maximum range of the time interval. If the time interval between two continuous rows are within the time interval specified by `tol_val` they belong to the same session window; otherwise a new session window is started automatically. -`EVENT_WINDOW` is determined according to the window start condition and the window close condition. The window is started when `start_trigger_condition` is evaluated to true, the window is closed when `end_trigger_condition` is evaluated to true. `start_trigger_condition` and `end_trigger_condition` -can be any conditional expressions supported by TDengine and can include multiple columns. +`EVENT_WINDOW` is determined according to the window start condition and the window close condition. The window is started when `start_trigger_condition` is evaluated to true, the window is closed when `end_trigger_condition` is evaluated to true. `start_trigger_condition` and `end_trigger_condition` can be any conditional expressions supported by TDengine and can include multiple columns. -`COUNT_WINDOW` is a counting window that is divided by a fixed number of data rows.`count_val`: A constant, which is a positive integer and must be greater than or equal to 2. The maximum value is 2147483648. `count_val` represents the maximum number of data rows contained in each `COUNT_WINDOW`. -When the total number of data rows cannot be divided by `count_val`, the number of rows in the last window will be less than `count_val`. `sliding_val`: is a constant that represents the number of window slides, similar to `SLIDING` in `INTERVAL`. +`COUNT_WINDOW` is a counting window that is divided by a fixed number of data rows.`count_val`: A constant, which is a positive integer and must be greater than or equal to 2. The maximum value is 2147483648. `count_val` represents the maximum number of data rows contained in each `COUNT_WINDOW`. When the total number of data rows cannot be divided by `count_val`, the number of rows in the last window will be less than `count_val`. `sliding_val`: is a constant that represents the number of window slides, similar to `SLIDING` in `INTERVAL`. For example, the following SQL statement creates a stream and automatically creates a supertable named `avg_vol`. The stream has a 1 minute time window that slides forward in 30 second intervals to calculate the average voltage of the meters supertable.