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docs: add histogram function

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gccgdb1234 2022-05-31 09:01:02 +08:00
parent e9216e929e
commit 2a8e87a777
2 changed files with 35 additions and 33 deletions
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2
docs-cn/12-taos-sql/07-function.md
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@ -294,7 +294,7 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam
**示例**： **示例**：
```sql ```mysql
taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters;
histogram(voltage, "user_input", "[1,3,5,7]", 1) | histogram(voltage, "user_input", "[1,3,5,7]", 1) |
======================================================= =======================================================

12
docs-en/12-taos-sql/07-function.md
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@ -275,11 +275,12 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam
**Applicable table types**: table, STable **Applicable table types**: table, STable
**说明**： **Explanations**：
1. bin_type: parameter to indicate the bucket type, valid inputs are: "user_input", "linear_bin", "log_bin"。 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: 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. - "user_input": "[1, 3, 5, 7]": User specified bin values.
- "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" - bin starting point. "start" - bin starting point.
@ -294,11 +295,12 @@ SELECT HISTOGRAM(field_name，bin_type, bin_description, normalized) FROM tb_nam
"count" - number of bins generated. "count" - number of bins generated.
"infinity" - whether to add（-inf, inf）as start/end point in generated range of bins. "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]. 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. 3. normalized: setting to 1/0 to turn on/off result normalization.
**示例**： **Example**：
```sql ```mysql
taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters; taos> SELECT HISTOGRAM(voltage, "user_input", "[1,3,5,7]", 1) FROM meters;
histogram(voltage, "user_input", "[1,3,5,7]", 1) | histogram(voltage, "user_input", "[1,3,5,7]", 1) |
======================================================= =======================================================