Upgrading Drupal

In the settings.php file i changed the name of the database since it signed me off and made my site offline once it asked for a "database update". This will set me back a few months of work if i have to reload all of my info and modules. Please help me, someone. I have been trying to figure out how Drupal works on and off since September of last year, as a result of these road bumps. Am I in deep trouble? or is there a way to save it?

Errors are as listed:

Warning: Table 'freshlyfit.access' doesn't exist query: SELECT 1 FROM access WHERE type = 'host' AND LOWER('67.160.227.238') LIKE LOWER(mask) AND status = 0 LIMIT 0, 1 in /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc on line 128

Warning: Table 'freshlyfit.users' doesn't exist query: SELECT u.*, s.* FROM users u INNER JOIN sessions s ON u.uid = s.uid WHERE s.sid = '2pv3ujqc8sm1eibn21g9vdr9b1' in /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc on line 128

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc:128) in /home/content/f/r/e/freshlyfit/html/includes/bootstrap.inc on line 1143

In the settings.php file i changed the name of the database since it signed me off and made my site offline once it asked for a "database update". This will set me back a few months of work if i have to reload all of my info and modules. Please help me, someone. I have been trying to figure out how Drupal works on and off since September of last year, as a result of these road bumps. Am I in deep trouble? or is there a way to save it?

Errors are as listed:

Warning: Table 'freshlyfit.access' doesn't exist query: SELECT 1 FROM access WHERE type = 'host' AND LOWER('67.160.227.238') LIKE LOWER(mask) AND status = 0 LIMIT 0, 1 in /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc on line 128

Warning: Table 'freshlyfit.users' doesn't exist query: SELECT u.*, s.* FROM users u INNER JOIN sessions s ON u.uid = s.uid WHERE s.sid = '2pv3ujqc8sm1eibn21g9vdr9b1' in /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc on line 128

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/f/r/e/freshlyfit/html/includes/database.mysqli.inc:128) in /home/content/f/r/e/freshlyfit/html/includes/bootstrap.inc on line 1143

Hallo,
I have a question about upgrading. I want to upgrade a website with an old version of Drupal. What is the best and recommended way to do this? Do I have to upgrade a version at a time or can I just upgrade to the latest version?
Any help will be much appreciated.
Thanks.

Hello,

I'm a designer who works wirh Drupal. One of the best things I find in Drupal is that I can give my clients a nice tool to mantain their website updated by themselves. I like it, because I don't want to deal with a project forever. And in fact, it's something my clients also love.

But Drupal and it's modules are changing every month, and I don't know if it's really necessary to upgrade it constantly. If it is, I'm thinking about the "maintenance" I should give to my clients' websites.

Hi dear everyone,
Some of my Drupal contents don't show up when I open my site with Opera, for example my photo gallery. Is it something to do with Drupal? Should I change some settings?
Thanks in advance!

A working, full drupal 6 site was uploaded to a Unix server from a Win7 dev system. The database was created and data imported via phpMySqlAdmin. I began getting errors that "...table mydb.content_field_dateStart didn't exist...". It did, but was named "content_field_datestart" - note the cap 'S' in the err msg! I renamed the table to have a cap 'S', and prob fixed!

The error was coming from 'view.inc' in the Views module - so far no other error has shown.