From d0c6f75f15e8c80760f8ade301917323606cb07b Mon Sep 17 00:00:00 2001 From: Elias Soong Date: Fri, 20 Aug 2021 19:16:47 +0800 Subject: [PATCH] [TD-4555] : update example code about SQL function DERIVATIVE(). --- documentation20/cn/12.taos-sql/docs.md | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/documentation20/cn/12.taos-sql/docs.md b/documentation20/cn/12.taos-sql/docs.md index 46f8c54a22..16b52f5773 100644 --- a/documentation20/cn/12.taos-sql/docs.md +++ b/documentation20/cn/12.taos-sql/docs.md @@ -1287,15 +1287,15 @@ TDengine支持针对数据的聚合查询。提供支持的聚合和选择函数 示例： ```mysql - taos> select derivative(current, 1d, 0) from t1; - ts | derivative(current, 1d, 0) | - ======================================================= - 2021-08-20 09:18:44.032 | 119.999966667 | - 2021-08-20 10:18:44.032 | -48.000000000 | - 2021-08-20 11:18:44.032 | -48.000000000 | - 2021-08-20 12:18:44.033 | 215.999940000 | - 2021-08-20 13:18:44.034 | -167.999953333 | - Query OK, 5 row(s) in set (0.004772s) + taos> select derivative(current, 10m, 0) from t1; + ts | derivative(current, 10m, 0) | + ======================================================== + 2021-08-20 10:11:22.790 | 0.500000000 | + 2021-08-20 11:11:22.791 | 0.166666620 | + 2021-08-20 12:11:22.791 | 0.000000000 | + 2021-08-20 13:11:22.792 | 0.166666620 | + 2021-08-20 14:11:22.792 | -0.666666667 | + Query OK, 5 row(s) in set (0.004883s) ``` - **SPREAD** -- GitLab