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Table locked? Can't click into cell and edit data...

Posted By:      Posted Date: October 17, 2010    Points: 0   Category :ASP.Net

 My previous version of sql management studio did not lock me out from a table. Why does this R2 version, after I say open all rows in a table, not allow me to then click on any cell I want to edit data?

It appears just the top 200 rows will allow this. How do I change this setting? What is the purpose of locking like this anyways? 

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