diff --git a/docs-cn/12-taos-sql/07-function.md b/docs-cn/12-taos-sql/07-function.md index 300060fb06..78389609db 100644 --- a/docs-cn/12-taos-sql/07-function.md +++ b/docs-cn/12-taos-sql/07-function.md @@ -278,24 +278,24 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam **适用于**: 表和超级表。 **说明**： - 1. bin_type 用户指定的分桶类型, 有效输入类型为"user_input“, ”linear_bin", "log_bin"。 - 2. 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]" +1. bin_type 用户指定的分桶类型, 有效输入类型为"user_input“, ”linear_bin", "log_bin"。 +2. 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}" + - "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）作为区间起点跟终点， 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}" + - "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）作为区间起点跟终点， 生成区间为[-inf, 1.0, 2.0, 4.0, 8.0, 16.0, +inf]。 - 3. normalized 是否将返回结果归一化到 0~1 之间 。有效输入为 0 和 1。 +3. normalized 是否将返回结果归一化到 0~1 之间 。有效输入为 0 和 1。 **示例**： -```sql - taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; +```mysql +taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; histogram(voltage, "user_input", "[1,3,5,7]", 1) | ======================================================= {"lower_bin":1, "upper_bin":3, "count":0.333333} | @@ -303,7 +303,7 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam {"lower_bin":5, "upper_bin":7, "count":0.333333} | Query OK, 3 row(s) in set (0.004273s) - taos> SELECT HISTOGRAM(voltage, 'linear_bin', '{"start": 1, "width": 3, "count": 3, "infinity": false}', 0) FROM meters; +taos> SELECT HISTOGRAM(voltage, 'linear_bin', '{"start": 1, "width": 3, "count": 3, "infinity": false}', 0) FROM meters; histogram(voltage, 'linear_bin', '{"start": 1, "width": 3, " | =================================================================== {"lower_bin":1, "upper_bin":4, "count":3} | @@ -311,7 +311,7 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam {"lower_bin":7, "upper_bin":10, "count":3} | Query OK, 3 row(s) in set (0.004887s) - taos> SELECT HISTOGRAM(voltage, 'log_bin', '{"start": 1, "factor": 3, "count": 3, "infinity": true}', 0) FROM meters; +taos> SELECT HISTOGRAM(voltage, 'log_bin', '{"start": 1, "factor": 3, "count": 3, "infinity": true}', 0) FROM meters; histogram(voltage, 'log_bin', '{"start": 1, "factor": 3, "count" | =================================================================== {"lower_bin":-inf, "upper_bin":1, "count":3} | diff --git a/docs-en/12-taos-sql/07-function.md b/docs-en/12-taos-sql/07-function.md index f06106ff9f..1c2961d7b5 100644 --- a/docs-en/12-taos-sql/07-function.md +++ b/docs-en/12-taos-sql/07-function.md @@ -275,54 +275,56 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam **Applicable table types**: table, STable -**说明**： - 1. bin_type: parameter to indicate the bucket type, valid inputs are: "user_input", "linear_bin", "log_bin"。 - 2. 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 defined specified bin values. +**Explanations**： - - "linear_bin": "{"start": 0.0, "width": 5.0, "count": 5, "infinity": true}" +1. bin_type: parameter to indicate the bucket type, valid inputs are: "user_input", "linear_bin", "log_bin"。 +2. 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}" + - "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 "log_bin" descriptor generates a set of bins:[-inf, 1.0, 2.0, 4.0, 8.0, 16.0, +inf]. - 3. normalized: setting to 1/0 to turn on/off result normalization. -**示例**： +3. normalized: setting to 1/0 to turn on/off result normalization. -```sql - taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; - histogram(voltage, "user_input", "[1,3,5,7]", 1) | +**Example**： + +```mysql +taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; + histogram(voltage, "user_input", "[1,3,5,7]", 1) | ======================================================= {"lower_bin":1, "upper_bin":3, "count":0.333333} | {"lower_bin":3, "upper_bin":5, "count":0.333333} | {"lower_bin":5, "upper_bin":7, "count":0.333333} | Query OK, 3 row(s) in set (0.004273s) - - taos> SELECT HISTOGRAM(voltage, 'linear_bin', '{"start": 1, "width": 3, "count": 3, "infinity": false}', 0) FROM meters; + +taos> SELECT HISTOGRAM(voltage, 'linear_bin', '{"start": 1, "width": 3, "count": 3, "infinity": false}', 0) FROM meters; histogram(voltage, 'linear_bin', '{"start": 1, "width": 3, " | =================================================================== {"lower_bin":1, "upper_bin":4, "count":3} | {"lower_bin":4, "upper_bin":7, "count":3} | {"lower_bin":7, "upper_bin":10, "count":3} | Query OK, 3 row(s) in set (0.004887s) - - taos> SELECT HISTOGRAM(voltage, 'log_bin', '{"start": 1, "factor": 3, "count": 3, "infinity": true}', 0) FROM meters; - histogram(voltage, 'log_bin', '{"start": 1, "factor": 3, "count" | - =================================================================== - {"lower_bin":-inf, "upper_bin":1, "count":3} | - {"lower_bin":1, "upper_bin":3, "count":2} | - {"lower_bin":3, "upper_bin":9, "count":6} | - {"lower_bin":9, "upper_bin":27, "count":3} | - {"lower_bin":27, "upper_bin":inf, "count":1} | + +taos> SELECT HISTOGRAM(voltage, 'log_bin', '{"start": 1, "factor": 3, "count": 3, "infinity": true}', 0) FROM meters; + histogram(voltage, 'log_bin', '{"start": 1, "factor": 3, "count" | + =================================================================== + {"lower_bin":-inf, "upper_bin":1, "count":3} | + {"lower_bin":1, "upper_bin":3, "count":2} | + {"lower_bin":3, "upper_bin":9, "count":6} | + {"lower_bin":9, "upper_bin":27, "count":3} | + {"lower_bin":27, "upper_bin":inf, "count":1} | ``` ## Selection Functions