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我有一个复杂的查询，它需要总共 4 个表中的字段。我有一个包含 OR 子句的内部连接语句，这大大降低了查询速度。
这是我的查询:
SELECT
pending_corrections.sightinguid AS 'pending_corrections_sightinguid',
vehicle_ownership.id AS 'fk_vehicle_owner',
@bill_id AS 'fk_bills',
@nullValue AS 'fk_final_sightings_sightinguid',
TRIM(pending_corrections.corrected_plate) AS 'vrn',
pending_corrections.seenDate AS 'seen_date',
cameras.in_out AS 'in_out',
vehicle_vrn.fk_sysno AS 'fk_sysno',
cameras.zone AS 'fk_zones',
'0' AS 'auto_generated'
FROM
(pending_corrections
INNER JOIN cameras ON pending_corrections.camerauid = cameras.camera_id)
INNER JOIN
vehicle_vrn ON (pending_corrections.corrected_plate = vehicle_vrn.vrn500
OR pending_corrections.corrected_plate = vehicle_vrn.vrnno)
INNER JOIN
vehicle_ownership ON vehicle_vrn.fk_sysno = vehicle_ownership.fk_sysno
WHERE
pending_corrections.corrected_plate <> ''
AND pending_corrections.corrected_plate IS NOT NULL
AND pending_corrections.unable_to_correct <> '1'
AND pending_corrections.seenDate >= @dateFrom
AND pending_corrections.seenDate <= @dateTo
AND (cameras.in_out = 1 OR cameras.in_out = 0)
AND cameras.zone IN (SELECT
zone_number
FROM
zones
WHERE
fk_site = @siteId)
AND seenDate >= vehicle_vrn.vrn_start_date
AND (seenDate <= vehicle_vrn.vrn_end_date
OR vehicle_vrn.vrn_end_date IS NULL
OR vehicle_vrn.vrn_end_date = '0001-01-01 00:00:00')
AND seenDate >= vehicle_ownership.ownership_start_date
AND (seenDate <= vehicle_ownership.ownership_end_date
OR vehicle_ownership.ownership_end_date IS NULL
OR vehicle_ownership.ownership_end_date = '0001-01-01 00:00:00')
ORDER BY pending_corrections.corrected_plate , pending_corrections.seenDate ASC;
如何在其中一个连接中没有 OR 的情况下实现相同的效果？ OR 子句的原因是因为 pending_corrections.corrected_plate 值必须匹配 vrn500 或 vrnno 列在 vehicle_vrn 表中。