query about sql server table query???

Question

i have a query select * from tablename thats taken execution time 10 second first time but when i execute again then take 2 second whats the reason ????

Vipin Mittal · Answer

thank u very help full ths article

Bryian Tan · Answer

This article provide the explanation to it. https://littlekendra.com/2016/11/25/why-is-my-query-faster-the-second-time-it-runs-dear-sql-dba-episode-23/