MSSQL Server Express Edition

Microsoft SQL Server 2005 Express Edition
http://www.microsoft.com/downloads/ko-kr/details.aspx?FamilyID=220549B5-0B07-4448-8848-DCC397514B41

Microsoft SQL Server Management Studio Express 2005
http://www.microsoft.com/downloads/ko-kr/details.aspx?FamilyID=c243a5ae-4bd1-4e3d-94b8-5a0f62bf7796&DisplayLang=ko

Microsoft SQL Server 2008 Express
http://www.microsoft.com/downloads/ko-kr/details.aspx?FamilyID=58CE885D-508B-45C8-9FD3-118EDD8E6FFF

Microsoft SQL Server 2008 Express with Advanced Services (Management Studio포함)
http://www.microsoft.com/downloads/ko-kr/details.aspx?FamilyID=7522A683-4CB2-454E-B908-E805E9BD4E28

Microsoft SQL Server 2008 Management Studio Express
http://www.microsoft.com/downloads/ko-kr/details.aspx?FamilyID=08E52AC2-1D62-45F6-9A4A-4B76A8564A2B