This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 77%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
I work on sql server 2012
my execution plan as below
https://www.brentozar.com/pastetheplan/?id=HJbwOAkhF
it not show missing index
so please how to enhance query please ?
A Microsoft extension to the ANSI SQL language that includes procedural programming, local variables, and various support functions.
Additional SQL Server features and topics not covered by specific categories
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 2%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESX%3C/text%3E%3C/svg%3E)
Hi @ahmed salah ,
We have not received a response from you. Did the reply could help you? If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. By doing so, it will benefit all community members who are having this similar issue. Your contribution is highly appreciated.
Best regards,
Seeya
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(67.2, 1%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETP%3C/text%3E%3C/svg%3E)
I can see from the query plan, you are running the RTM version of SQL 2017. You need to update to a current patch level.
Do you really need "SELECT DISTINCT" in your sub queries? This is very costly in your query.
so what i use instead of select distinct if it very cost
Hi @ahmed salah ,
Welcome to Microsoft Q&A!
Sorting is a resource intensive operation. You can try to create an index on the columns involved in order by.
For other suggestions, please refer to your previous thread.
Best regards,
Seeya
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
Hi @ahmed salah ,
You can try to use GROUP BY then compare the performance between them:
https://dba.stackexchange.com/questions/24711/alternative-query-to-this-avoid-distinct
Best regards,
Seeya