[英]How to tune this query?
我正在計算資源成本:
SELECT NVL(sum(WT.TRANSACTION_QUANTITY* WTA.RATE_OR_AMOUNT),0)
-- INTO l_resource_cost
FROM APPS.WIP_TRANSACTION_ACCOUNTS WTA, APPS.WIP_TRANSACTIONS WT
WHERE WTA.TRANSACTION_ID = WT.TRANSACTION_ID
AND WTA.ORGANIZATION_ID = WT.ORGANIZATION_ID
AND WTA.ACCOUNTING_LINE_TYPE =7
AND WTA.WIP_ENTITY_ID = 1757957
AND wt.operation_seq_num = 10;
這些表是Oracle ebs WIP表,數據正確,但是需要對數千條記錄執行。
我該如何調整?
我可以在這里附上解釋計划嗎?
首先,學習使用正確的顯式JOIN
語法。 簡單規則: 請勿在FROM
子句中使用逗號:
SELECT COALESCE(sum(WT.TRANSACTION_QUANTITY * WTA.RATE_OR_AMOUNT), 0)
-- INTO l_resource_cost
FROM APPS.WIP_TRANSACTION_ACCOUNTS WTA JOIN
APPS.WIP_TRANSACTIONS WT
ON WTA.TRANSACTION_ID = WT.TRANSACTION_ID AND
WTA.ORGANIZATION_ID = WT.ORGANIZATION_ID
WHERE WTA.ACCOUNTING_LINE_TYPE = 7 AND WTA.WIP_ENTITY_ID = 1757957 AND
wt.operation_seq_num = 10;
索引將有助於查詢。 我建議:
APPS.WIP_TRANSACTION_ACCOUNTS(ACCOUNTING_LINE_TYPE, WIP_ENTITY_ID, RATE_OR_AMOUNT)
APPS.WIP_TRANSACTIONS(TRANSACTION_ID, ORGANIZATION_ID, operation_seq_num, TRANSACTION_QUANTITY)
。
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