sql server - set transaction read only option generates error -

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Since I am new to SQL Server, this question may seem very naive for most of you. Quoting a book on SQL, I came to this statement 

  ** Set transaction read-only, read separation level latent, Diagnostics size 5; **   
 But when executed, it returns the following error.  Message 156, Level 15, State 1, Line 2  Wrong syntax near the keyword 'reading'.    
 
 
 It seems that in relation to SQL Server rather than dealing with SQL Server Some information about a programming languages ​​are mentioned. As far as I know, the transaction is set to read only and the level of isolation is related to the cases

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