wild card for entry id mysql
Well, if you want to update ALL entries, why don't you just get rid of the condition, and execute:

UPDATE blog_entry SET allow_view_entry = 'everyone'


Otherwise, you can use a wildcard indeed, and build your statement like this:

UPDATE blog_entry SET allow_view_entry = 'everyone'
WHERE entry_id LIKE '%245%'


using the common wildcards that go with the LIKE operator.