From 6808d72b1e02aa8174c7abeed1cf79d7eb10c832 Mon Sep 17 00:00:00 2001 From: Elias Soong Date: Thu, 4 Mar 2021 16:07:23 +0800 Subject: [PATCH] [TD-2992] : add "between and" support in where clause. --- documentation20/cn/12.taos-sql/docs.md | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/documentation20/cn/12.taos-sql/docs.md b/documentation20/cn/12.taos-sql/docs.md index ff6adad045..aba8faa677 100644 --- a/documentation20/cn/12.taos-sql/docs.md +++ b/documentation20/cn/12.taos-sql/docs.md @@ -627,19 +627,21 @@ Query OK, 1 row(s) in set (0.001091s) ### 支持的条件过滤操作 -| Operation | Note | Applicable Data Types | -| --------- | ----------------------------- | ------------------------------------- | -| > | larger than | **`timestamp`** and all numeric types | -| < | smaller than | **`timestamp`** and all numeric types | -| >= | larger than or equal to | **`timestamp`** and all numeric types | -| <= | smaller than or equal to | **`timestamp`** and all numeric types | -| = | equal to | all types | -| <> | not equal to | all types | -| % | match with any char sequences | **`binary`** **`nchar`** | -| _ | match with a single char | **`binary`** **`nchar`** | +| Operation | Note | Applicable Data Types | +| ----------- | ----------------------------- | ------------------------------------- | +| > | larger than | **`timestamp`** and all numeric types | +| < | smaller than | **`timestamp`** and all numeric types | +| >= | larger than or equal to | **`timestamp`** and all numeric types | +| <= | smaller than or equal to | **`timestamp`** and all numeric types | +| = | equal to | all types | +| <> | not equal to | all types | +| between and | within a certain range | **`timestamp`** and all numeric types | +| % | match with any char sequences | **`binary`** **`nchar`** | +| _ | match with a single char | **`binary`** **`nchar`** | 1. 同时进行多个字段的范围过滤，需要使用关键词 AND 来连接不同的查询条件，暂不支持 OR 连接的不同列之间的查询过滤条件。 -2. 针对单一字段的过滤，如果是时间过滤条件，则一条语句中只支持设定一个；但针对其他的（普通）列或标签列，则可以使用``` OR``` 关键字进行组合条件的查询过滤。例如：((value > 20 and value < 30) OR (value < 12)) 。 +2. 针对单一字段的过滤，如果是时间过滤条件，则一条语句中只支持设定一个；但针对其他的（普通）列或标签列，则可以使用 `OR` 关键字进行组合条件的查询过滤。例如：((value > 20 AND value < 30) OR (value < 12)) 。 +3. 从 2.0.17 版本开始，条件过滤开始支持 BETWEEN AND 语法，例如 `WHERE col2 BETWEEN 1.5 AND 3.25` 表示查询条件为“1.5 ≤ col2 ≤ 3.25”。 ### SQL 示例 -- GitLab