fix docs

docs/en/12-taos-sql/10-function.md

@@ -126,7 +126,7 @@ SELECT COS(field_name) FROM { tb_name | stb_name } [WHERE clause]
 SELECT FLOOR(field_name) FROM { tb_name | stb_name } [WHERE clause];
 ```
 
-**Description**: The rounded down value of a specific field  
+**Description**: The rounded down value of a specific field
  **More explanations**: The restrictions are same as those of the `CEIL` function.
 
 #### LOG
@@ -173,7 +173,7 @@ SELECT POW(field_name, power) FROM { tb_name | stb_name } [WHERE clause]
 SELECT ROUND(field_name) FROM { tb_name | stb_name } [WHERE clause];
 ```
 
-**Description**: The rounded value of a specific field.  
+**Description**: The rounded value of a specific field.
  **More explanations**: The restrictions are same as those of the `CEIL` function.
 
 
@@ -434,7 +434,7 @@ SELECT TO_ISO8601(ts[, timezone]) FROM { tb_name | stb_name } [WHERE clause];
 **More explanations**:
 
 - You can specify a time zone in the following format: [z/Z, +/-hhmm, +/-hh, +/-hh:mm]。 For example, TO_ISO8601(1, "+00:00").
-- If the input is a UNIX timestamp, the precision of the returned value is determined by the digits of the input timestamp 
+- If the input is a UNIX timestamp, the precision of the returned value is determined by the digits of the input timestamp
 - If the input is a column of TIMESTAMP type, the precision of the returned value is same as the precision set for the current data base in use
 
 
@@ -769,14 +769,14 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam
 
 **Explanations**：
 - bin_type: parameter to indicate the bucket type, valid inputs are: "user_input", "linear_bin", "log_bin"。
-- bin_description: parameter to describe how to generate buckets，can be in the following JSON formats for each bin_type respectively:       
-    - "user_input": "[1, 3, 5, 7]": 
+- bin_description: parameter to describe how to generate buckets，can be in the following JSON formats for each bin_type respectively:
+    - "user_input": "[1, 3, 5, 7]":
        User specified bin values.
-       
+
     - "linear_bin": "{"start": 0.0, "width": 5.0, "count": 5, "infinity": true}"
        "start" - bin starting point.       "width" - bin offset.       "count" - number of bins generated.       "infinity" - whether to add（-inf, inf）as start/end point in generated set of bins.
        The above "linear_bin" descriptor generates a set of bins: [-inf, 0.0, 5.0, 10.0, 15.0, 20.0, +inf].
- 
+
     - "log_bin": "{"start":1.0, "factor": 2.0, "count": 5, "infinity": true}"
        "start" - bin starting point.       "factor" - exponential factor of bin offset.       "count" - number of bins generated.       "infinity" - whether to add（-inf, inf）as start/end point in generated range of bins.
        The above "linear_bin" descriptor generates a set of bins: [-inf, 1.0, 2.0, 4.0, 8.0, 16.0, +inf].
@@ -862,9 +862,9 @@ SELECT INTERP(field_name) FROM { tb_name | stb_name } [WHERE where_condition] RA
 
 - `INTERP` is used to get the value that matches the specified time slice from a column. If no such value exists an interpolation value will be returned based on `FILL` parameter.
 - The input data of `INTERP` is the value of the specified column and a `where` clause can be used to filter the original data. If no `where` condition is specified then all original data is the input.
-- The output time range of `INTERP` is specified by `RANGE(timestamp1,timestamp2)` parameter, with timestamp1<=timestamp2. timestamp1 is the starting point of the output time range and must be specified. timestamp2 is the ending point of the output time range and must be specified. 
-- The number of rows in the result set of `INTERP` is determined by the parameter `EVERY`. Starting from timestamp1, one interpolation is performed for every time interval specified `EVERY` parameter. 
-- Interpolation is performed based on `FILL` parameter. 
+- The output time range of `INTERP` is specified by `RANGE(timestamp1,timestamp2)` parameter, with timestamp1<=timestamp2. timestamp1 is the starting point of the output time range and must be specified. timestamp2 is the ending point of the output time range and must be specified.
+- The number of rows in the result set of `INTERP` is determined by the parameter `EVERY`. Starting from timestamp1, one interpolation is performed for every time interval specified `EVERY` parameter.
+- Interpolation is performed based on `FILL` parameter.
 - `INTERP` can only be used to interpolate in single timeline. So it must be used with `partition by tbname` when it's used on a STable.
 
 ### LAST
@@ -917,7 +917,7 @@ SELECT MAX(field_name) FROM { tb_name | stb_name } [WHERE clause];
 
 **Return value type**:Same as the data type of the column being operated upon
 
-**Applicable data types**: Numeric, Timestamp
+**Applicable data types**: Numeric
 
 **Applicable table types**: standard tables and supertables
 
@@ -932,7 +932,7 @@ SELECT MIN(field_name) FROM {tb_name | stb_name} [WHERE clause];
 
 **Return value type**:Same as the data type of the column being operated upon
 
-**Applicable data types**: Numeric, Timestamp
+**Applicable data types**: Numeric
 
 **Applicable table types**: standard tables and supertables
 
@@ -968,7 +968,7 @@ SELECT SAMPLE(field_name, K) FROM { tb_name | stb_name } [WHERE clause]
 
 **Applicable table types**: standard tables and supertables
 
-**More explanations**: 
+**More explanations**:
 
 This function cannot be used in expression calculation.
 - Must be used with `PARTITION BY tbname` when it's used on a STable to force the result on each single timeline
@@ -1046,10 +1046,10 @@ SELECT CSUM(field_name) FROM { tb_name | stb_name } [WHERE clause]
 
 **Applicable table types**: standard tables and supertables
 
-**More explanations**: 
-  
+**More explanations**:
+
 - Arithmetic operation can't be performed on the result of `csum` function
-- Can only be used with aggregate functions This function can be used with supertables and standard tables. 
+- Can only be used with aggregate functions This function can be used with supertables and standard tables.
 - Must be used with `PARTITION BY tbname` when it's used on a STable to force the result on each single timeline
 
 
@@ -1067,8 +1067,8 @@ SELECT DERIVATIVE(field_name, time_interval, ignore_negative) FROM tb_name [WHER
 
 **Applicable table types**: standard tables and supertables
 
-**More explanation**: 
-  
+**More explanation**:
+
 - It can be used together with `PARTITION BY tbname` against a STable.
 - It can be used together with a selected column. For example: select \_rowts, DERIVATIVE() from。
 
@@ -1086,7 +1086,7 @@ SELECT {DIFF(field_name, ignore_negative) | DIFF(field_name)} FROM tb_name [WHER
 
 **Applicable table types**: standard tables and supertables
 
-**More explanation**: 
+**More explanation**:
 
 - The number of result rows is the number of rows subtracted by one, no output for the first row
 - It can be used together with a selected column. For example: select \_rowts, DIFF() from。
@@ -1123,9 +1123,9 @@ SELECT MAVG(field_name, K) FROM { tb_name | stb_name } [WHERE clause]
 
 **Applicable table types**: standard tables and supertables
 
-**More explanations**: 
-  
-- Arithmetic operation can't be performed on the result of `MAVG`. 
+**More explanations**:
+
+- Arithmetic operation can't be performed on the result of `MAVG`.
 - Can only be used with data columns, can't be used with tags. - Can't be used with aggregate functions.
 - Must be used with `PARTITION BY tbname` when it's used on a STable to force the result on each single timeline
 

docs/zh/12-taos-sql/10-function.md

@@ -127,7 +127,7 @@ SELECT COS(field_name) FROM { tb_name | stb_name } [WHERE clause]
 SELECT FLOOR(field_name) FROM { tb_name | stb_name } [WHERE clause];
 ```
 
-**功能说明**：获得指定字段的向下取整数的结果。  
+**功能说明**：获得指定字段的向下取整数的结果。
  其他使用说明参见 CEIL 函数描述。
 
 #### LOG
@@ -174,7 +174,7 @@ SELECT POW(field_name, power) FROM { tb_name | stb_name } [WHERE clause]
 SELECT ROUND(field_name) FROM { tb_name | stb_name } [WHERE clause];
 ```
 
-**功能说明**：获得指定字段的四舍五入的结果。  
+**功能说明**：获得指定字段的四舍五入的结果。
  其他使用说明参见 CEIL 函数描述。
 
 
@@ -435,7 +435,7 @@ SELECT TO_ISO8601(ts[, timezone]) FROM { tb_name | stb_name } [WHERE clause];
 **使用说明**：
 
 - timezone 参数允许输入的时区格式为: [z/Z, +/-hhmm, +/-hh, +/-hh:mm]。例如，TO_ISO8601(1, "+00:00")。
-- 如果输入是表示 UNIX 时间戳的整形，返回格式精度由时间戳的位数决定; 
+- 如果输入是表示 UNIX 时间戳的整形，返回格式精度由时间戳的位数决定;
 - 如果输入是 TIMESTAMP 类型的列，返回格式的时间戳精度与当前 DATABASE 设置的时间精度一致。
 
 
@@ -770,14 +770,14 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam
 
 **详细说明**：
 - bin_type 用户指定的分桶类型, 有效输入类型为"user_input“, ”linear_bin", "log_bin"。
-- bin_description 描述如何生成分桶区间，针对三种桶类型，分别为以下描述格式(均为 JSON 格式字符串)：       
-    - "user_input": "[1, 3, 5, 7]" 
+- bin_description 描述如何生成分桶区间，针对三种桶类型，分别为以下描述格式(均为 JSON 格式字符串)：
+    - "user_input": "[1, 3, 5, 7]"
        用户指定 bin 的具体数值。
-       
+
     - "linear_bin": "{"start": 0.0, "width": 5.0, "count": 5, "infinity": true}"
        "start" 表示数据起始点，"width" 表示每次 bin 偏移量, "count" 为 bin 的总数，"infinity" 表示是否添加（-inf, inf）作为区间起点和终点，
        生成区间为[-inf, 0.0, 5.0, 10.0, 15.0, 20.0, +inf]。
- 
+
     - "log_bin": "{"start":1.0, "factor": 2.0, "count": 5, "infinity": true}"
        "start" 表示数据起始点，"factor" 表示按指数递增的因子，"count" 为 bin 的总数，"infinity" 表示是否添加（-inf, inf）作为区间起点和终点，
        生成区间为[-inf, 1.0, 2.0, 4.0, 8.0, 16.0, +inf]。
@@ -918,7 +918,7 @@ SELECT MAX(field_name) FROM { tb_name | stb_name } [WHERE clause];
 
 **返回数据类型**：同应用的字段。
 
-**适用数据类型**：数值类型，时间戳类型。
+**适用数据类型**：数值类型。
 
 **适用于**：表和超级表。
 
@@ -933,7 +933,7 @@ SELECT MIN(field_name) FROM {tb_name | stb_name} [WHERE clause];
 
 **返回数据类型**：同应用的字段。
 
-**适用数据类型**：数值类型，时间戳类型。
+**适用数据类型**：数值类型。
 
 **适用于**：表和超级表。
 
@@ -969,7 +969,7 @@ SELECT SAMPLE(field_name, K) FROM { tb_name | stb_name } [WHERE clause]
 
 **适用于**：表和超级表。
 
-**使用说明**： 
+**使用说明**：
 
 - 不能参与表达式计算；该函数可以应用在普通表和超级表上；
 - 使用在超级表上的时候，需要搭配 PARTITION by tbname 使用，将结果强制规约到单个时间线。
@@ -1047,10 +1047,10 @@ SELECT CSUM(field_name) FROM { tb_name | stb_name } [WHERE clause]
 
 **适用于**：表和超级表。
 
-**使用说明**： 
-  
+**使用说明**：
+
 - 不支持 +、-、*、/ 运算，如 csum(col1) + csum(col2)。
-- 只能与聚合（Aggregation）函数一起使用。 该函数可以应用在普通表和超级表上。 
+- 只能与聚合（Aggregation）函数一起使用。 该函数可以应用在普通表和超级表上。
 - 使用在超级表上的时候，需要搭配 PARTITION BY tbname使用，将结果强制规约到单个时间线。
 
 
@@ -1068,8 +1068,8 @@ SELECT DERIVATIVE(field_name, time_interval, ignore_negative) FROM tb_name [WHER
 
 **适用于**：表和超级表。
 
-**使用说明**: 
-  
+**使用说明**:
+
 - DERIVATIVE 函数可以在由 PARTITION BY 划分出单独时间线的情况下用于超级表（也即 PARTITION BY tbname）。
 - 可以与选择相关联的列一起使用。 例如: select \_rowts, DERIVATIVE() from。
 
@@ -1087,7 +1087,7 @@ SELECT {DIFF(field_name, ignore_negative) | DIFF(field_name)} FROM tb_name [WHER
 
 **适用于**：表和超级表。
 
-**使用说明**: 
+**使用说明**:
 
 - 输出结果行数是范围内总行数减一，第一行没有结果输出。
 - 可以与选择相关联的列一起使用。 例如: select \_rowts, DIFF() from。
@@ -1124,9 +1124,9 @@ SELECT MAVG(field_name, K) FROM { tb_name | stb_name } [WHERE clause]
 
 **适用于**：表和超级表。
 
-**使用说明**： 
-  
-- 不支持 +、-、*、/ 运算，如 mavg(col1, k1) + mavg(col2, k1); 
+**使用说明**：
+
+- 不支持 +、-、*、/ 运算，如 mavg(col1, k1) + mavg(col2, k1);
 - 只能与普通列，选择（Selection）、投影（Projection）函数一起使用，不能与聚合（Aggregation）函数一起使用；
 - 使用在超级表上的时候，需要搭配 PARTITION BY tbname使用，将结果强制规约到单个时间线。