# EXAMPLE - SUMIF and COUNTDISTINCTIF Functions

This example illustrates how you can use conditional calculation functions.

Functions:

Item

Description

SUMIF Function

Generates the sum of rows in each group that meet a specific condition.

COUNTDISTINCTIF Function

Generates the count of distinct non-null values for rows in each group that meet a specific condition.

Source:

Here is some example polling data across 16 precincts in 8 cities across 4 counties, where registrations have been invalidated at the polling station, preventing voters from voting. Precincts where this issue has occurred previously have been added to a watch list (precinctWatchList).

totalReg

invalidReg

precinctWatchList

precinctId

cityId

countyId

731

24

y

1

1

1

743

29

y

2

1

1

874

0

3

2

1

983

0

4

2

1

622

29

5

3

2

693

0

6

3

2

775

37

y

7

4

2

1025

49

y

8

4

2

787

13

9

5

3

342

0

10

5

3

342

39

y

11

6

3

387

28

y

12

6

3

582

59

13

7

4

244

0

14

7

4

940

6

y

15

8

4

901

4

y

16

8

4

Transformation:

First, you want to sum up the invalid registrations (invalidReg) for precincts that are already on the watchlist (precinctWatchList = y). These sums are grouped by city, which can span multiple precincts:

Transformation Name New formula Single row formula SUMIF(invalidReg, precinctWatchList == "y") cityId 'invalidRegbyCityId'

The invalidRegbyCityId column contains invalid registrations across the entire city.

Now, at the county level, you want to identify the number of precincts that were on the watch list and were part of a city-wide registration problem.

In the following step, the number of cities in each count are counted where invalid registrations within a city is greater than 60.

• This step creates a pivot aggregation.

Transformation Name Pivot columns countyId COUNTDISTINCTIF(precinctId, invalidRegbyCityId > 60) 1

Results:

countyId

countdistinctif_precinctId

1

0

2

2

3

2

4

0

The voting officials in counties 2 and 3 should investigate their precinct registration issues.