提交 6808d72b 编写于 作者: E Elias Soong

[TD-2992] <docs>: add "between and" support in where clause.

上级 c34c8164
......@@ -628,18 +628,20 @@ 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 |
| 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
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