Fetching large results into excel

Question

I would like to fetch 50,000 records from an oracle database and store it as an ascii file so that it can be viewed through an excel. The request will be initiated from a client�s computer through J2ee web application.
1. What is the best way to fetch the 50,000 records and store in an ASCII/Excel file?
2. Is there a potential performance issue in writing into local PC/Laptop?
Thankyou,
Ramran

Answer 1

Ramran wrote:
I would like to fetch 50,000 records from an oracle database and store it as an ascii file so that it can be viewed through an excel. Who in their right mind would want to view 50K records on the web?
The request will be initiated from a client’s computer through J2ee web application. What's the use case? Here's one:
1. User specifies WHERE clause to specify which records they want
2. Application queries database and sends result to browser using Excel MIME type
3. User now has the option of saving the browser as an Excel file to their local machine
1. What is the best way to fetch the 50,000 records and store in an ASCII/Excel file?"Best"? You'll use JDBC for the fetch, of course. I'd use Andy Khan's JExcel and Spring's JExcelView to render in the browser.
2. Is there a potential performance issue in writing into local PC/Laptop?Sure. Depending on how large each record is (X bytes/record), you'll have 50000X bytes consumed on the server and in the browser for each request. How many simultaneous users do you plan on having? Nevermind the network latency required to fetch the data and stream it to the browser.
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