SQL Server Default Database

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1. master database: save server connection information (login account, connection definition).
Related files:
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\master.mdf
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\mastlog.ldf
 
2. model database: template databaes.
Related files:
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\model.mdf
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\modellog.ldf
 
3. msdb database: automatic plan, automatic jobs.
Related files:
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\msdbdata.mdf
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\msdblog.ldf
 
4. tempdb database: temp table, temp variable
Related files:
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\tempdb.mdf
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Data\templog.ldf
 
5. resource database: read-only database, save structure and description of system objects
Related files:
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Binn\Mssqlsystemresource.mdf
<install path>\MSSQL10.MSSQLSERVER\MSSQL\Binn\Mssqlsystemresource.ldf

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