Depends on how many bytes in table, and how long a row is.
A SQL page is 8K, with 8060 total bytes available for data. Each row resides on a single page (excluding special column types).
So if every row takes, say, 4100 bytes, each would take a whole page, with the rest of that page unuseable except to expand the existing row.
SQL DBA,SQL Server MVP(07, 08, 09)[size=2]Prosecutor James Blackburn, in closing argument in the Fatal Vision murders trial: If in the future, you should cry a tear, cry one for them [the murder victims]. If in the future, you should say a prayer, say one for them. And if in the future, you should light a candle, light one for them.[/size]