Question

I create a java desktop app which communicates with a server for getting data from mysql.

Currently this query on server:

select
    ec_transactions.added,
    ec_transactions.merchant_id,
    ---
    ec_customer_billing_details.card_payment_method,
    ---
    ec_customer_details.first_name,
    ---
    ec_customer_card_details.card_holde r_name,
    ---
from
    ec_transactions,
    ec_customer_billing_details,
    ec_customer_details,
    ec_customer_card_details  
where ec_transactions.transactions_id =  tranId 
  AND ec_customer_billing_details.customer_id =  custId 
  AND ec_customer_details.customer_id   =  custId  
  AND ec_customer_card_details.customer_id =  custId 

---

is too slow.
How can i do it faster?

Answer 1

You can check this using the explain plan and setting indixes if not set on you tables, besides you can optimize your query, take a look at MySql documentation regarding optimizing statements.