Indexes on [dbo].[eligibility]([member_id]) INCLUDE ([eligibility_id])

and [memberphonelookup]([member_id])

Is it really returning all the rows in the table? If so then why has the OP got a where clause?

How many rows does the query return?

An obvious solution is to create an index on Final_date and include columns (column1, column2... column18)

You might be able to get away with just...

I expected that if I use pagination it will only load 1st page for me, which should be very quick. And load the rest pages only if users request...

Instead of applying the recompile at the procedure level, you can apply it at the query level within the stored procedure using the OPTION (RECOMPILE) hint. This way, only specific...

Are you creating a temp table i.e. one that begins with a hash (#) or are you using a permanent table name?

Yes, that's a bit shorter and generally more efficient. I'm wondering if there were a lot more that 12 items per customer and the right indexes on the...

;WITH CTE AS
(
    SELECT DISTINCT CustomerCode
      FROM myTable
)
SELECT B.*
  FROM CTE A
 CROSS APPLY(SELECT TOP(12) *
...

;WITH CTE AS
(
    SELECT DISTINCT CustomerCode
      FROM myTable
)
SELECT B.*
  FROM CTE A
 CROSS APPLY(SELECT TOP(12) *
  ...

If you are sure you always want it to seek the values you can give the query a hint:

SELECT *
  INTO #SROISDPL
 ...

You need a colon after numbers:

def calculate_sum(numbers):
    total = 0
    for num in numbers:
       ...

As Jeff said partitioning is the best way and fastest way to remove large chucks of data by date.

When you want to regularly remove old data from a database, there...

Paste it into Excel and create a line chart then add a trend line.

Here is something to get you started:

WITH CompanyData AS 
(
    SELECT * FROM (VALUES
        ('[24]7 Customer, Inc.'),
...

The code was not created by me. I am just investing some one else's code, this person is leaving us soon. I just want to make sure that the...