<Tr> <Th> Developed by </Th> <Td> Microsoft </Td> </Tr> <Tr> <Th> Type of format </Th> <Td> Relational database </Td> </Tr> <P> SQL CE databases reside in a single . sdf file, which can be up to 4 GB in size . The . sdf file can be encrypted with 128 - bit encryption for data security . SQL CE runtime mediates concurrent multi-user access to the . sdf file . The . sdf file can simply be copied to the destination system for deployment, or be deployed through ClickOnce . SQL CE runtime has support for DataDirectories . Applications using an SQL CE database need not specify the entire path to an . sdf file in the ADO.NET connection string, rather it can be specified as DataDirectory \ <database_name>. sdf, defining the data directory (where the . sdf database file resides) being defined in the assembly manifest for the application . </P> <P> SQL Server Management Studio 2005 can read and modify CE 3.0 and 3.1 database files (with the latest service pack), but SQL Server Management Studio 2008 (or later) is required to read version 3.5 files . Microsoft Visual Studio Express 2008 SP1 can create, modify, and query CE 3.5 SP1 database files . SQL Server Management Studio cannot read CE 4.0 files . Visual Studio 2010 SP1 can handle CE 4.0 database files . </P>

What is sql server compact edition database file