在我使用SQL Server的情況下，如何使用左聯接顯示左表中的所有記錄？

Question

實際上，我得到了輸出，但是它是不完整的。

在我的左表中，我擁有所有記錄，但是當我在右表中進行過濾時，並沒有從左表中獲取所有記錄

Answer 1

顯然，它不顯示左數據，因為WHERE子句將其排除在外

您可以在WHERE中添加OR idsp.Time == 0

Where
item.ItemLookupCode = '100006C0005' and
(idsp.Time between '2017-07-16' and '2017-07-31' and idsp.StoreID <> 1001 and Item.ParentItem = 0 and Item.ItemType <> 9) OR idsp.Time IS NULL

Answer 2

您不應該在LEFT JOIN右側使用的表放在WHERE子句中，因為這樣可以有效地將LEFT JOIN變成INNER。

將條件移到JOIN子句本身：

LEFT JOIN Item ON dynamics.ItemID = Item.ID  
  AND item.ItemLookupCode = '100006C0005' 
  AND Item.ParentItem = 0 
  AND Item.ItemType <> 9
LEFT JOIN Sales idsp ON idsp.ItemID = Item.ID 
  AND idsp.StoreID = dynamics.StoreID 
  AND idsp.Time between '2017-07-16' and '2017-07-31' 
  AND idsp.StoreID <> 1001 

Answer 3

我認為左聯接存儲是您想要的：

from 
    ItemDynamic dynamics
    inner join Store WITH(NOLOCK) on dynamics.StoreID = Store.ID and store.Inactive = 0
    LEFT JOIN Item WITH(NOLOCK) on dynamics.ItemID = Item.ID and Item.ParentItem = 0
    LEFT JOIN Sales idsp WITH(NOLOCK) on idsp.ItemID = Item.ID and Item.ParentItem = 0 and idsp.StoreID = dynamics.StoreID
    and idsp.Time between '2017-07-16' and '2017-07-31' and idsp.StoreID <> 1001 and Item.ParentItem = 0 and Item.ItemType <> 9
    LEFT JOIN Department WITH(NOLOCK) on Department.ID = Item.DepartmentID
    LEFT JOIN Category WITH(NOLOCK) on Category.ID = item.CategoryID
    LEFT JOIN Supplier WITH(NOLOCK) on Supplier.ID = item.SupplierID
Where
    item.ItemLookupCode = '100006C0005' and
 --   idsp.Time between '2017-07-16' and '2017-07-31' and idsp.StoreID <> 1001 and Item.ParentItem = 0 and Item.ItemType <> 9

您可能需要在左連接中添加條件，並在where子句中添加注釋

Answer 4

將WHERE條件添加到您的聯接中：

LEFT JOIN Sales idsp WITH(NOLOCK) 
       ON idsp.ItemID = Item.ID 
      AND Item.ParentItem = 0 
      AND idsp.StoreID = dynamics.StoreID
      AND idsp.Time between '2017-07-16' and '2017-07-31' 
      AND idsp.StoreID <> 1001

並將其從您的WHERE中刪除

Answer 5

try with following code

remove your where clause and put those conditions with your joins




select 
    dynamics.ItemID,
    item.ItemLookupCode,
    dynamics.StoreID,
    Department.Name Department,
    Category.Name Category,
    Supplier.Code,
    Supplier.SupplierName,
    sum(idsp.Qty) SoldQty,
    sum(idsp.ExtendedCost) SoldExtCost,
    sum(idsp.ExtendedPrice) SoldExtPrice,
    dynamics.RestockLevel,
    CASE WHEN isNull(sum(idsp.Qty),0) > (dynamics.RestockLevel * 0.75) THEN 'Fast Moving'
    WHEN isNull(sum(idsp.Qty),0) > (dynamics.RestockLevel * 0.25) THEN 'Average Moving'
    WHEN isNull(sum(idsp.Qty),0) > 0 THEN 'Slow Moving'
    WHEN isNull(sum(idsp.Qty),0) = 0 THEN 'No Moving' END AS Moving
from 
    ItemDynamic dynamics
    inner join Store WITH(NOLOCK) on dynamics.StoreID = Store.ID and store.Inactive = 0
    LEFT JOIN Item WITH(NOLOCK) on dynamics.ItemID = Item.ID and Item.ParentItem = 0 and item.ItemLookupCode = '100006C0005'
    LEFT JOIN Sales idsp WITH(NOLOCK) on idsp.ItemID = Item.ID and Item.ParentItem = 0 and idsp.StoreID = dynamics.StoreID and idsp.Time between '2017-07-16' and '2017-07-31' and idsp.StoreID <> 1001 and Item.ParentItem = 0 and Item.ItemType <> 9
    LEFT JOIN Department WITH(NOLOCK) on Department.ID = Item.DepartmentID
    LEFT JOIN Category WITH(NOLOCK) on Category.ID = item.CategoryID
    LEFT JOIN Supplier WITH(NOLOCK) on Supplier.ID = item.SupplierID


Group By 
    dynamics.ItemID,
    item.ItemLookupCode,
    dynamics.StoreID,
    dynamics.RestockLevel,
    Department.Name,
    Category.Name,
    Supplier.Code,
    Supplier.SupplierName
order by 
    item.ItemLookupCode