SQL Server/T-SQL Tutorial/System Settings/TIMETICKS
@@TIMETICKS Displays the number of microseconds per tick. A tick is a unit of measurement designated by a
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specified number of milliseconds (31.25 milliseconds for Windows 2000). 3> 4> SELECT "TimeTicks", @@TIMETICKS 5> GO
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TimeTicks 31250 (1 rows affected)</source>