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Tags: average _id return IDT car int SQL statement using NULLDefinition and usageThe AVG function returns the average of a numeric column. NULL values are not included in the calculation.SQL AVG () syntaxSELECT AVG (column_name) from table_nameSQL AVG () instanceWe have the following "Orders" table: o_

How to Use the AVG function in MySQL to calculate the average value, The AVG function of MySQL is used to obtain the average value of fields in various records. For more information about the AVG function, consider that the EMPLOYEE_TBL table has the following records: mysql> SELECT * FROM employee_tbl;+------+------+------------+--------------------+| id | name

----aggregate function--do the calculations to do statistics on NULL filtering: null is the value that you don't know, so you can't do the calculation--sum (Parameters): statistics and--avg (parameter): averaging--max (parameter): Maximum value--min (parameter): Minimum value--count (parameter): Gets the number of records that meet the criteria--1. Total number of participantsSelect COUNT (Email) from Student--2. Get the maximum age value the greater

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The AVG function of MySQL is used to find the average of the fields in various records. To understand the AVG feature consider the EMPLOYEE_TBL table has the following records: Mysql> SELECT * from EMPLOYEE_TBL; +------+------+------------+--------------------+ | id | name | work_date | daily_typing_pages | +------+------+------------+--------------------+ | 1 | John | 2007-01-24 | The | |

We are introducingOracleIf there is a null value in the given value,OracleThese null values are ignored. This processing method most of the time meets our requirements, but sometimes there may be problems. For example, when the year ends, the company will reward some employees, but some of them will not be rewarded. For example, if an employee's reward amount is saved in a table, the reward amount corresponding to some employees is null because they are not rewarded at all, now, the boss asks

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Hive There are a number of analytic functions available to complete the responsible statistical analysis. This article first describes the sum , AVG , MIN , the four functions of Max . Environmental information:Hive version number is Apache-hive-0.14.0-binHadoop version number is hadoop-2.6.0Tez version number is tez-0.7.0To construct the data:p088888888888,2016-02-10,1p088888888888,2016-02-11,3p088888888888,2016-02-12,1p088888888888,2016-02-13,9p0888

The average value of items during the defined evaluation period.Format: avg (sec | # num, Sec or # num)Supported value types: floating, INTExample:Avg (#5): 5 latest average valuesAvg (1 h): Average value within one hourAvg (1 h, 1d): Average value of one hour before a dayI. Example:1, hourly average{Www.111cn.net: nginx. http. avg (1 h) }= 30000The hourly average value of nginx http key is triggered if = 3