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HOW IS TRANSACTION ISOLATION LEVEL SET  VS SESSION.tx_isolation?

Robert Silver
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Last Modified: 2014-11-03
This is a basic question or so I believe!

Where and how do you set a current transaction isolation setting
I checked @@session.tx_isoation an @@tx_isolation are the same

so what variable or sql command sequence  sets things such that it is either transaction specific to a specific transaction or the default for just begin end transactions???

there is supposed to be three different setting but I found only 2 so far: session and global
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