Home/ Questions/Q 8125337
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-06T06:46:57+00:00

I am looking to iterate through a USERS table, and for each user selected

  • 0

I am looking to iterate through a USERS table, and for each user selected based on my where clauses, perform a bunch of mysql queries within the LOOP, including temp table creates, using prepare statements, etc

What is the best way in terms of performance should this be done. Using while, for each, for, repeat ?

eg.(Pseudo code)

foreach user_name in (select user_name from users where user_type = 'SP' and active = 'Y')
do
    set @l_query1 = concat("create temp_table_t1 select * from ...")
    PREPARE ..
    EXECUTE ...

    set @l_query2 = ... 
    ....
    .... etc .. 
done

Ok, i have a table users, where pK = user_name.

So,this query will be fast to execute,
I just need to LOOP through this resultSet, and execute the remaining of the mySQL queries within the LOOP.
How can i LOOP through the resultSet of a simple select ?

thanks

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    There’s no difference in performance between while, for-each, repeat, etc.

    If you’re looking for performance gains, consider where you might reduce the number of queries the code executes on the database. For example, it would be a huge help to run a query once for all users, rather than running it once each for every user.

    • 0