on a second

[Jignesh77]

"A pivot table is tool used in spreadsheet programs designed to collect information from one table or spreadsheet and then summarize the data on a second. Aside from making data easier to read"
What is a Pivot Table?
What does "on a second" mean? Why do we need "a" before "second"? What makes the reference indefinite in that phrase?
Thank you in advance.

 

[Tegs]

Second refers back to table or spreadsheet. So, summarize the data on a second table or spreadsheet.

 

[pops91710]

"A pivot table is tool used in spreadsheet programs designed to collect information from one table or spreadsheet and then summarize the data on a second table. Aside from making data easier to read"