I have written an SQL query but I want to optimize it [closed]

Posted by ankit gupta on Programmers See other posts from Programmers or by ankit gupta
Published on 2012-11-01T08:31:24Z Indexed on 2012/11/01 11:14 UTC
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is there any way to do this using minimum no of joins and select?

2 tables are involved in this operation transaction_pci_details and transaction

SELECT
t6.transaction_pci_details_id,
t6.terminal_id,
t6.transaction_no,
t6.transaction_id,
t6.transaction_type,
t6.reversal_flag,
t6.transmission_date_time,
t6.retrivel_ref_no,
t6.card_no,t6.card_type,
t6.expires_on,
t6.transaction_amount,
t6.currency_code,
t6.response_code,
t6.action_code,
t6.message_reason_code,
t6.merchant_id,
t6.auth_code,
t6.actual_trans_amnt,
t6.bal_card_amnt,
t5.sales_person_id
FROM TRANSACTION AS t5
INNER JOIN
(
    SELECT
    t4.transaction_pci_details_id,
        t4.terminal_id,
        t4.transaction_no,
        t4.transaction_id,
        t4.transaction_type,
    t4.reversal_flag,
        t4.transmission_date_time,
        t4.retrivel_ref_no,
        t4.card_no,
        t4.card_type,
        t4.expires_on,
    t4.transaction_amount,
        t4.currency_code,
        t4.response_code,
        t4.action_code,
        t3.message_reason_code,
    t4.merchant_id,
        t4.auth_code,
        t4.actual_trans_amnt,
        t4.bal_card_amnt
    FROM
    (   SELECT*
        FROM    transaction_pci_details 
        WHERE   message_reason_code LIKE '%OUT%'|| 
            message_reason_code LIKE '%FAILED%' /*we can add date here*/
        UNION ALL
        SELECT         
                t2.transaction_pci_details_id,
                t2.terminal_id,
                t2.transaction_no,
                t2.transaction_id,
                t2.transaction_type,
                t2.reversal_flag,
                t2.transmission_date_time,
                t2.retrivel_ref_no,
                t2.card_no,
                t2.card_type,
                t2.expires_on,
                t2.transaction_amount,
                t2.currency_code,
                t2.response_code,
                t2.action_code,
                t2.message_reason_code,
                t2.merchant_id,
                t2.auth_code,
                t2.actual_trans_amnt,
                t2.bal_card_amnt
        FROM
        (   SELECT transaction_id
            FROM TRANSACTION
            WHERE transaction_type_id = 8
        )   AS t1
        INNER JOIN
        (   SELECT * 
            FROM transaction_pci_details 
            WHERE message_reason_code LIKE '%appro%' /*we can add date here*/
        )   AS t2
        ON t1.transaction_id = t2.transaction_id
    )   AS t3
    INNER JOIN
    (   SELECT*
        FROM    transaction_pci_details 
        WHERE   action_code LIKE '%REQ%' /*we can add date here*/
    )   AS t4
    ON t3.transaction_pci_details_id - t4.transaction_pci_details_id = 1
)   AS t6
ON t5.transaction_id = t6.transaction_id

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