Is it true instead of where condition , inner join and having make faster query?

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SQL-Server-2014

Hi,

Is it true instead of where condition, inner join and having making faster execution of query ?

How to increase sql performance while dealing with large size database

Regards,
Aravind

What I have tried:

It just learning purpose.
How to increase sql performance while dealing with large size database

Posted 25-Mar-18 23:07pm

Aravindba

Updated 25-Mar-18 23:28pm

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OriginalGriff · Answer 1 · 2018-03-25T23:29:00

Solution 1

Depends on who you ask, and on the actual query - it's very easy to make an inefficient query with either!

So look at your queries, and specifically at their associated execution plans: Displaying Graphical Execution Plans (SQL Server Management Studio)[^]

Posted 25-Mar-18 23:29pm

OriginalGriff

Comments

Aravindba 3-Apr-18 5:49am

Hi its ok , i have another doubt in ASP.Net, if using GC.collection and session variable also make website will slow ? i am just asking form learning purpose. GC.collection and session variable using every single secs for each user. if 2 users login same time then GC.collection and session variable will use double time ,so it will down then website ?
Bcz for user active we run update query every secs to update values in sql server from website , and from windows service we check that values reach maximum , if reach then we remove from table.
So if user try to login, first it will check that table value got or not,if not then we allow to login otherwise we show "User already login,pls logout first"

regards,
Aravind

OriginalGriff 3-Apr-18 6:03am

Why the heck are you manually using the GC? You should almost never need to touch it, that's the whole idea.