如何使用SQL Server使用左连接显示左表中的所有记录？

Question

其实我得到了我的输出，但它部分。

在我的左表我有所有的记录，但是当我在右表中做过滤它不是从左表中把所有的记录

Answer 1

我觉得左加入到家店是你是什么寻找：

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 

您可能需要添加在where子句

Answer 2

obviusly它doesen't显示左数据，因为在左连接状况和评论WHERE clausule排除他们

您可以将一个或idsp.Time == 0添加到您的左侧右侧使用WHERE

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 3

表连接，你不应该把在WHERE子句，因为这有效将LEFT JOIN变成INNER。

移动你的条件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 4

添加WHERE条件您的加盟：

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 

从你的WHERE

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