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System databases Vs User created databases
Posted on 2013-01-24
Hi
I am using following query to get the list of db
select * from sys.databases (or select * from sysdatabases)
My question is how can we know that which db is system database and which one is user created?
Regards
Karan Gupta
I am using following query to get the list of db
select * from sys.databases (or select * from sysdatabases)
My question is how can we know that which db is system database and which one is user created?
Regards
Karan Gupta
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8 Comments
-- User Databases
Select *
From sys.databases
Where database_id > 5
--System Databases
Select *
From sys.databases
Where database_id <= 5
Select *
From sys.databases
Where database_id > 5
--System Databases
Select *
From sys.databases
Where database_id <= 5
Active today
SID is a system-level identification number.
when an object is created it is assigned an id - SID, that number identifies the object as a securable within SQL Server and then the object is deleted, the id is recycled.
when an object is created it is assigned an id - SID, that number identifies the object as a securable within SQL Server and then the object is deleted, the id is recycled.
Active today
One difference would be
Select *
From sys.databases
Where database_id > 5
will not return aspnetdb
and
SELECT * FROM sys.databases
WHERE owner_sid != 1
will return aspnetdb
aspnetdb is not a system database, it is the default database for using the ASP.NET Application Services
Select *
From sys.databases
Where database_id > 5
will not return aspnetdb
and
SELECT * FROM sys.databases
WHERE owner_sid != 1
will return aspnetdb
aspnetdb is not a system database, it is the default database for using the ASP.NET Application Services
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