If you want to select all rows from a table using SQL Server 2008 Management Studio, here is how:
1. Go to Tools > Options > SQL Server Object Explorer
2. Change both the 'Value for Edit Top n Rows command' and 'Value for Select Top n Rows command' to zero.
3. You can now view or edit all rows of a table.
SQL 2008 - Change ‘Edit Top 200 Rows"