﻿ Sql Average from Multiple Columns - ITCodar

# Sql Average from Multiple Columns

## Average of multiple columns

If the data is stored as `INT`, you may want to try

``Average = (R1 + R2 + R3 + R4 + R5) / 5.0``

## SQL Find Average Multiple Columns

If you are using MySQL, you can get the average -- ignoring `NULL`s -- using:

``SELECT (COALESCE(`2.R.1`, 0) + COALESCE(`2.R.2`, 0) + COALESCE(`2.R.3`, 0) + COALESCE(`3.R.1`, 0) + COALESCE(`3.R.2`, 0) + COALESCE(`3.R.5`, 0)) /       ((`2.R.1` IS NOT NULL) + (`2.R.2` IS NOT NULL) + (`2.R.3` IS NOT NULL) + (`3.R.1` IS NOT NULL) + (`3.R.2` IS NOT NULL) + (`3.R.5` IS NOT NULL)       )FROM standards_dataWHERE `uuid` = 4;``

This calculates the average within each row. If you actually want the average across rows as well, you can use `AVG()` with the above as the argument.

## Find the average of two combined columns in sql

By definition, `AVG(col1) = SUM(col1)/COUNT(*)` and `AVG(col2) = SUM(col2)/COUNT(*)`, therefore `(SUM(col1)+SUM(col2))/COUNT(*)` = `AVG(col1) + AVG(col2)`.

Also, the commutativity of addition gives us `(SUM(col1)+SUM(col2))/COUNT(*) = SUM(col1+col2)/COUNT(*)` and hence `AVG(col1+col2)`.

## Average Multiple Columns in Postgres

Try this

``  select coalesce (PRICE_INSTORE, 0 ) +  coalesce (PRICE_PICKUP, 0) + coalesce (PRICE_DELIVERY , 0) + coalesce (PRICE_SHIP , 0)  /  ((case when PRICE_INSTORE is null then 0 else 1 end) + (case when PRICE_PICKUP is null then 0 else 1 end) + (case when PRICE_DELIVERY is null then 0 else 1 end) + (case when PRICE_SHIP is null then 0 else 1 end) ) from product``

## How to take average of two columns row by row in SQL?

try this:

``SELECT     m.country_id,     m.season,    m.home_goal,    m.away_goal,    (m.home_goal + m.away_goal)/2  AS avg_goalFROM match AS m;``

You have been asked for the group_by as avg() much like sum() work on multiple values of one column where you classify all columns that are not a columns wise operation in the group by

You are looking to average two distinct columns - it is a row-wise operations instead of column-wise

## SQL average multiple columns for each row with nulls

Instead of dividing by 3, use

``(CASE WHEN Quality IS NULL THEN 0 ELSE 1 END +  CASE WHEN Schedule IS NULL THEN 0 ELSE 1 END +  CASE WHEN [Cost Control] IS NULL THEN 0 ELSE 1 END)``

## Average of two columns in SQL

You should give it a try:

``SELECT A, AVG((B+C)/2) as bc, AVG((C+B)/2) as cbFROM tableTestWHERE A = 'S'GROUP BY A``

## Oracle : Selecting multiple columns with avg function

I think you've overthought this... all you need to do is add `player` into the select list in your first query and add `player` into the group by:

``select player,       round(avg(g1 + g2 + g3 + g4)) as "Average Score"from   ch_usergroup by playerid, player;``