meaning of ## in SQL Server Profiler trace data I'm running a trace using the SQL Server Profiler.  The trace data contains the following lines:

WHERE CAST(LEFT(pc.Time_stamp,11) AS DATETIME &gt;= ##
AND CAST(LEFT(pc.Time_stamp, 11) AS DATETIME) &lt;= ##


What does the ## mean
First, if you're using SQL Server 2008 or higher, the Profiler is deprecated - look into using Extended Events instead. 

The ## marks serve as a placeholder for the value of the variables being used in the query.