cross database ownership chaining

when we enable "cross database ownership chaining" option under ms sql security when i right click to properties in microsoft sql server management studio.what are advantages and practical use of it?
please advise
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Mark WillsTopic AdvisorCommented:
It only has benefit when you need access to objects in another database.

There is a reason why it is OFF by default, and assume you think you might have reasons to enable. Might be easier to talk about those reasons....

IIt is a potentially big topic, so suggest you read :  it also has a link to ownership chaining which explores some of the underlying principles.

And read why it is Off-by-Default :

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Scott PletcherSenior DBACommented:
Leave it disabled; it opens too many security holes.
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Microsoft SQL Server

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