I don't know why I can't create a new database in SQL Server Management Studio Express.
This is the reason:
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CREATE DATABASE permission denied in database 'master'. (.Net SqlClient Data Provider)
------------------------------For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.3042&EvtSrc=MSSQLServer&EvtID=262&LinkId=20476
------------------------------Server Name: Ning-PC\SQLEXPRESSError Number: 262
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