MySQL子查詢-在WHERE條件下使用SELECT的別名（無CTE）

Question

我試圖找出/如何在下面下調例如實現子查詢。

問題是我需要根據時區添加小時數，然后返回這些字段。
但是，同時，我需要按相同的字段進行過濾，為了准確起見，我需要將它們調整為正確的時區。

能否請您給我一個有關如何解決此問題的建議？

SELECT
od.ID AS 'Id',
CASE WHEN tzp.ZoneId='Etc/GMT-1'
    THEN ADDDATE(od.declaredStartTime, INTERVAL 1 HOUR)
    ELSE od.declaredStartTime END AS 'Collection date\\time',
CASE WHEN tzd.ZoneId='Etc/GMT-1'
    THEN ADDDATE(od.declaredEndTime, INTERVAL 1 HOUR)
    ELSE od.declaredEndTime END AS 'Delivery date\\time'
FROM orders od
LEFT OUTER JOIN time_zone AS tzp
    ON (tzp.ID = od.pickupTimeZone_ID)
LEFT OUTER JOIN time_zone AS tzd
    ON (tzd.ID = od.dropTimeZone_ID)
WHERE
    od.IS_DELETED != '1'
    -- AND 'Delivery date\\time' >= '2019-06-30' --<< This won't work because
    -- AND 'Delivery date\\time' <= '2019-08-01' --<< SELECT is the last operation

不幸的是，我沒有選擇使用CTE，因為我們的MySQL是5.6，而CTE從8.0開始可用

編輯：使代碼示例有效

編輯：命令的完整工作版本

SELECT
    od.ID                                               AS 'Id',
    od.referenceNumber                                  AS 'Reference number',
    od.secondReferenceNumber                            AS 'Second reference number',
    od.status                                           AS 'Status',
    ADDDATE(od.created, INTERVAL 1 HOUR)                AS 'Creation date/time', -- BST not accounted for!
    st.name                                             AS 'Shipment type',
    IFNULL(sp.name, '')                                 AS 'Supplier',
    ls.name                                             AS 'Collection location',
    CASE WHEN tzp.ZoneId='Etc/GMT-1'
        THEN ADDDATE(od.declaredStartTime, INTERVAL 1 HOUR)
        ELSE od.declaredStartTime END                   AS 'Collection date\\time',
    ld.name                                             AS 'Delivery location',
    CASE WHEN tzd.ZoneId='Etc/GMT-1'
        THEN ADDDATE(od.declaredEndTime, INTERVAL 1 HOUR)
        ELSE od.declaredEndTime END                     AS 'Delivery date\\time',
    od.supplierRate                                     AS 'Supplier rate (pounds)',
    IFNULL(od.alternativeSupplierRate, '')              AS 'Supplier alternative rate (pounds)',
    od.supplierTransportTotal                           AS 'Supplier total rate (pounds)',
    od.customerRate                                     AS 'Customer rate (pounds)',
    IFNULL(od.alternativeCustomerRate, '')              AS 'Customer alternative rate (pounds)',
    od.customerTransportTotal                           AS 'Customer total rate (pounds)',
    IFNULL(od.quantity, '')                             AS 'Quantity',
    IFNULL(od.weight, '')                               AS 'Weight',
    IFNULL(od.palletQuantity, '')                       AS 'Pallet quantity',
    IFNULL(od.kmsTravelled, '')                         AS 'Kms travelled',
    IFNULL(od.carbonFootprint, '')                      AS 'Carbon footprint',
    IFNULL(od.performanceScore, '')                     AS 'Performance score',
    od.fuel_surcharge                                   AS 'Fuel surcharge (pounds)',
    od.caf_surcharge                                    AS 'CAF surcharge (pounds)',
    IFNULL(od.supplierFuelSurcharge, '')                AS 'Supplier fuel surcharge (pounds)',
    IFNULL(od.supplierCAFSurcharge, '')                 AS 'Supplier CAF surcharge (pounds)',
    od.vehiclesRegistrationInformation                  AS 'Vehicles registration information',
    od.trailerIsChecked                                 AS 'Trailer is checked',
    od.checkedTrailerNumber                             AS 'Trailer number',
    od.additionalPickupsNumber                          AS 'Number of additional pickups',
    od.additionalDropsNumber                            AS 'Number of additional drops',
    IFNULL(od.customerRateFromPricingMatrix, '')        AS 'Customer rate from pricing matrix',
    IFNULL(od.supplierRateFromPricingMatrix, '')        AS 'Supplier rate from pricing matrix',
    IF(el.shipmentLateType IS NULL, 'FALSE', 'TRUE')    AS 'Is late', -- NULL or late type
    IFNULL(rc.name, '')                                 AS 'Late category',
    od.comment                                          AS 'Comments',
    od.customerComment                                  AS 'Customer comments',
    od.supplierComment                                  AS 'Supplier comments',
    IF(od.rejectedByCustomer, 'TRUE', 'FALSE')          AS 'Rejected by customer',  -- dbck
    IFNULL(uc.name, '')                                 AS 'Unallocation reason',
    IFNULL(us2.name, '')                                AS 'Unallocation user',
    IFNULL(ur.created, '')                              AS 'Unallocation date/time',
    IFNULL(sp2.name, '')                                AS 'Unallocation supplier',
    IFNULL(od.supplierRankPosition, '')                 AS 'Supplier\'s position',
    IFNULL(od.supplierRank, '')                         AS 'Supplier\'s rank',
    IFNULL(od.highestRankOnAllocation, '')              AS 'Highest rank',
    IF(od.proveOfDelivery IS NULL, 'FALSE', 'TRUE')     AS 'POD attached', -- NULL or filename
    IFNULL(od.supplierInvoiceNumber, '')                AS 'Supplier Sage invoice number',
    IFNULL(od.customerInvoiceNumber, '')                AS 'Customer Sage invoice number',
    IFNULL(od.purchaseOrderNumber, '')                  AS 'Purchase orders batch number',
    IFNULL(vc.name, '')                                 AS 'Vehicle',
    IFNULL(od.invoicingKmsTravelled, '0')               AS 'Actual Kms travelled',
    IFNULL(od.duration, '0')                            AS 'Actual duration',
    IFNULL(vc.location, '')                             AS 'Vehicle location',  -- loc verify
    IFNULL(tp.idling, '0')                              AS 'Idling time',
    IFNULL(tp.fuelUsed, '0')                            AS 'Fuel used',
    IF(od.hasDeliveryDiscrepancy, 'TRUE', 'FALSE')      AS 'Has delivery discrepancy',
    IFNULL(od.deliveryDiscrepancyReasonID, '')          AS 'Delivery discrepancy reason Id',
    IFNULL(dc1.title, '')                               AS 'Delivery discrepancy reason name',
    IFNULL(od.deliveryDiscrepancyComment, '')           AS 'Delivery discrepancy comment',
    IF(od.hasHazardousGoods, 'TRUE', 'FALSE')           AS 'Has hazardous goods',
    IFNULL(od.surchargeReasonId, '')                    AS 'Surcharge reason Id',
    IFNULL(dc2.title, '')                               AS 'Surcharge reason name',
    od.bookingReference                                 AS 'Booking reference',
    od.driverName                                       AS 'Driver',
    CASE
        WHEN ISNULL(wr.passed) THEN                     'Not started'
        WHEN SUM(CASE WHEN wr.passed=0 THEN 1 ELSE 0 END)=0
        THEN                                            'Passed'
        ELSE                                            'Failed'
    END                                                 AS 'Walkaround Check status',
    SUM(CASE
        WHEN wr.passed=0 THEN 1 ELSE 0
    END)                                                AS 'Walkaround Check failed count'
FROM orders od
LEFT OUTER JOIN shipment_type               AS st
    ON (st.ID = od.shipmentType_ID)
LEFT OUTER JOIN shipment_unallocate_reason  AS ur
    ON (ur.shipment_ID = od.ID)
LEFT OUTER JOIN unallocate_reason_codes     AS uc
    ON (uc.ID = ur.reasonCode_ID)
LEFT OUTER JOIN user                        AS us2
    ON (us2.ID = ur.user_ID)
LEFT OUTER JOIN suppliers                   AS sp
    ON (sp.ID = od.supplier_ID)
LEFT OUTER JOIN suppliers                   AS sp2
    ON (sp2.ID = ur.supplier_ID)
LEFT OUTER JOIN walk_around_check           AS wc
    ON (wc.shipment_id = od.ID)
LEFT OUTER JOIN walk_around_check_result    AS wr
    ON (wr.check_id = wc.ID)
LEFT OUTER JOIN walk_around_check_item      AS wi
    ON (wr.check_item_id = wi.id)
LEFT OUTER JOIN landmark                    AS ld
    ON (ld.ID = od.destination_id)
LEFT OUTER JOIN landmark                    AS ls
    ON (ls.ID = od.source_id)
LEFT OUTER JOIN landmark                    AS lw
    ON (lw.ID = wc.location_id)
LEFT OUTER JOIN time_zone                   AS tzp
    ON (tzp.ID = od.pickupTimeZone_ID)
LEFT OUTER JOIN time_zone                   AS tzd
    ON (tzd.ID = od.dropTimeZone_ID)
LEFT OUTER JOIN user                        AS us
    ON (us.ID = wc.driver_id)
LEFT OUTER JOIN shipment_event              AS el
    ON (el.Shipment_ID = od.ID) -- AND se.shipmentLateType = 'DELIVERY_LATE'
LEFT OUTER JOIN late_reason_codes           AS rc
    ON (rc.ID = el.reasonCode_ID)
LEFT OUTER JOIN dictionary                  AS dc1
    ON (dc1.id = od.deliveryDiscrepancyReasonID)
LEFT OUTER JOIN dictionary                  AS dc2
    ON (dc2.id = od.surchargeReasonId)
LEFT OUTER JOIN trips                       AS tp
    ON (tp.shipment_ID = od.ID)
LEFT OUTER JOIN vehicle                     AS vc
    ON (vc.id = tp.vehicle_ID)
WHERE od.IS_DELETED != '1'
    -- NOTE: Have to compare dates incl. timezone changes!!!
    -- AND 'Collection date\\time' >= '2019-06-30'
    -- AND 'Collection date\\time' <= '2019-08-01'
    -- AND 'Delivery date\\time' >= '2019-06-30'
    -- AND 'Delivery date\\time' <= '2019-08-01'
GROUP BY od.ID  -- required in conjunction with SUM to not return single row
ORDER BY od.ID ASC

Answer 1

您必須在WHERE子句中重復CASE語句：

AND CASE 
  WHEN tzd.ZoneId='Etc/GMT-1'THEN ADDDATE(od.declaredEndTime, INTERVAL 1 HOUR)
  ELSE od.declaredEndTime 
END BETWEEN '2019-06-30' AND '2019-08-01'

代替：

AND 'Delivery date\\time' >= '2019-06-30'
AND 'Delivery date\\time' <= '2019-08-01'

這樣做的另一種方法是使用HAVING子句而不是WHERE但這將需要將查詢嵌套為子查詢，因為您已經在使用GROUP BY ：

SELECT Id, `Collection date\\time`, `Delivery date\\time` 
FROM (
  SELECT
  od.ID AS 'Id',
  CASE WHEN tzp.ZoneId='Etc/GMT-1'
    THEN ADDDATE(od.declaredStartTime, INTERVAL 1 HOUR)
    ELSE od.declaredStartTime END AS `Collection date\\time`,
  CASE WHEN tzd.ZoneId='Etc/GMT-1'
    THEN ADDDATE(od.declaredEndTime, INTERVAL 1 HOUR)
    ELSE od.declaredEndTime END AS `Delivery date\\time`,
  FROM orders od
  LEFT OUTER JOIN time_zone AS tzp
    ON (tzp.ID = od.pickupTimeZone_ID)
  LEFT OUTER JOIN time_zone AS tzd
    ON (tzd.ID = od.dropTimeZone_ID)
  HAVING
    od.IS_DELETED != '1'
    AND `Delivery date\\time` >= '2019-06-30' --<< This won't work because
    AND `Delivery date\\time` <= '2019-08-01' --<< SELECT is the last operation
)
GROUP....

注意：由於使用了GROUP BY子句，因此這些計算列在選擇列表中的意義是什么？ 您的陳述甚至不應運行。 也許這並不是您真正擁有的確切代碼。