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Database Functions & Filtering
Excel has two special functions for analyzing lots of data with more than one set of criteria
DCOUNT: counts the number of times an event occurs meeting a criteria
DAVERAGE: finds the average of events meeting a criteria
Database Functions & Filtering
DCOUNTThis is the range of data to be counted. Must include column headings
Leave this blank
Specify the criteria to be counted. Need the same column headings as database
Database Functions & Filtering
Ex: (from text) Use Cars.xls file to determine how many Toyotas were repaired in Arizona. Open Cars.xls and copy the headings.
Paste the headings on an empty sheet.
Type the criteria you want to count.
Database Functions & Filtering
Sol (cont): To find how many Toyotas were repaired in Arizona, use DCOUNT
Enter range of data with headings
Leave Blank
Enter your search criteria. This will be the cells from the previous slide
Database Functions & Filtering
Ex: Use Cars.xls file to determine how many Toyotas were repaired in Arizona or Utah.
Sol: Same directions as previous example. Exception: need two lines, one for
Arizona & one for Utah Both lines should contain Toyota
Database Functions & Filtering
DAVERAGE:
still need correct column headings
will find the average of criteria you specify
Database Functions & Filtering Ex: Use Cars.xls file to determine the
average repair cost of Fords that were repaired in New Mexico.
Soln:
Same directions as previous example except use DAVERAGE.
Select the heading that you want to average and put in “Field.”
Database Functions & Filtering
Sol:Specify database including column headings
Type the name of the heading that you want to average in quotation marks
Enter search criteria according to the column headings you copied and pasted
Database Functions & Filtering
Ex: Use Cars.xls file to determine the average repair cost of Chevrolets that were repaired in Utah at speeds that were at least 8 mph.
Sol:
Database Functions & Filtering
Finding probability using two DCOUNT functions
Ex: What percentage of Chevrolet’s were repaired in Arizona?
Database Functions & Filtering
Sol (cont): Next, find the # of Chevrolet’s repaired in Arizona.
So, there were repaired in Arizona.
%43.327424
Database Functions & Filtering Filtering
Allows you to list all the items of data meeting a certain criteria
Use DCOUNT to get data
Click on any empty cell
Select Data/Filter/Advanced Filter
Database Functions & Filtering
Filtering
Click here
Specify range of data
Specify the criteria you want listed
Tell Excel where you want the data items to be displayed
Database Functions and Filtering
Focus on the Project: Variables:
Y: borrower with 7 years of experienceT: borrower with Bachelor’s DegreeC: borrower with loan during Normal
economy Use DCOUNT to find number of
records with Y, then T, then C
Database Functions and Filtering
Focus on the Project:
Number of Y records: 239
Number of successful Y records: 105
Number of failed Y records: 134
Database Functions and Filtering
Focus on the Project:
Number of T records: 1,154
Number of successful T records: 510
Number of failed T records: 644