CODEWITHSUNDEEP
phpmysqlweb
inVINCEable
inVINCEable

Reputation: 2206

Select Multiple Values from different columns

I have 5 different columns with over 100 rows each having an assortment of numbers.

I have been able to count all values from column 1 that equal 3

I want to be able to count all the number 3s from all 5 different columns and add them

$countquery = "SELECT COUNT(*) FROM PowerBall WHERE W1=3";
$countresult = mysql_query($countquery) or die(mysql_error());

while($countrow = mysql_fetch_array($countresult)) {
    echo "<br />";
    echo "There are ". $countrow['COUNT(*)']."-3s";
}

Upvotes: 1

Views: 83

Answers (2)

Taryn
Taryn

Reputation: 247690

You can use an aggregate function with a CASE expression to get the total number of 3 values in all of your columns. 

Select
  sum(case when col1 = 3 then 1 else 0 end) TotalCol1,
  sum(case when col2 = 3 then 1 else 0 end) TotalCol2,
  sum(case when col3 = 3 then 1 else 0 end) TotalCol3,
  sum(case when col4 = 3 then 1 else 0 end) TotalCol4,
  sum(case when col5 = 3 then 1 else 0 end) TotalCol5
from PowerBall

If you want this in one column, then you can use:

select TotalCol1 + TotalCol2 + TotalCol3 + TotalCol4 + TotalCol5
from
(
  Select
    sum(case when col1 = 3 then 1 else 0 end) TotalCol1,
    sum(case when col2 = 3 then 1 else 0 end) TotalCol2,
    sum(case when col3 = 3 then 1 else 0 end) TotalCol3,
    sum(case when col4 = 3 then 1 else 0 end) TotalCol4,
    sum(case when col5 = 3 then 1 else 0 end) TotalCol5
  from PowerBall
) src

Or even:

select sum(Total)
from
(
  Select count(col1) Total
  from PowerBall
  where col1 = 3
  union all
  Select count(col2)
  from PowerBall
  where col2 = 3
  union all
  Select count(col3)
  from PowerBall
  where col3 = 3
  union all
  Select count(col4)
  from PowerBall
  where col4 = 3
  union all
  Select count(col5)
  from PowerBall
  where col5 = 3
) src

Upvotes: 4

RandomUs1r
RandomUs1r

Reputation: 4190

SELECT SUM(CASE WHEN COL1 = 3 THEN 1 ELSE 0 END) AS 'Col1',
SUM(CASE WHEN COL1 = 3 THEN 1 ELSE 0 END) AS 'Col2',
....
 FROM PowerBall WHERE W1 is not null

Upvotes: 1

Related Questions