Reports - Case Count Column
You may want a column that displays a 1 for each case in a report. For example, to give a Summation something to count.
Click on Advanced Add Columns, then in the Method 2 section, add a "New Literal Number" column to the report. If you are counting cases, add the new column from the Case Data fields list:

Then edit that column after it appears on your report. Optionally change the Heading. Put the number 1 in the Expression box:

Now your report will show a "1" in that column on every row.