[英]How to join two tables that are joined together with two other tables each
I've been taking my head for a while. 我一直在琢磨我的头脑。 I wish to make a query that joins two tables, each of these tables and joined with two other tables as the schema below.
我希望创建一个连接两个表的查询,每个表以及另外两个表作为下面的模式连接。 I know how to join tables but at this point I block.
我知道如何连接表,但此时我阻止了。
SELECT
recipe_requirement.ID recipe_requirement_ID,
recipe_requirement.RecipeID recipe_requirement_RecipeID,
recipe_requirement.MaterialObjectTypeID,
recipe_requirement_MaterialObjectTypeID,
recipe_requirement.Quantity recipe_requirement_Quantity,
recipe_requirement.IsRegionItemRequired,
recipe_requirement_IsRegionItemRequired,
recipe.ID recipe_ID,
recipe.Name recipe_Name,
recipe.StartingToolsID recipe_StartingToolsID,
items.ID items_ID,
items.ContainerID items_ContainerID,
items.ObjectTypeID items_ObjectTypeID,
items.Quantity items_Quantity,
items.FeatureID items_FeatureID,
objects_types.ID objects_types_ID,
objects_types.Name objects_types_Name,
movable_objects.ID movable_objects_ID,
movable_objects.ObjectTypeID movable_objects_ObjectTypeID,
movable_objects.RootContainerID movable_objects_RootContainerID,
movable_objects.IsComplete movable_objects_IsComplete,
movable_objects.CustomNameId movable_objects_CustomNameId
FROM recipe_requirement
JOIN movable_objects ON movable_objects.RootContainerID = items.ContainerID
JOIN objects_types ON objects_types.ID = items.ObjectTypeID
JOIN recipe ON recipe.ID = recipe_requirement.RecipeID
JOIN items ON items.ObjectTypeID = recipe_requirement.MaterialObjectTypeID
JOIN objects_types ON objects_types.ID = Recipe_requirement.MaterialObjectTypeID
WHERE movable_objects.IsComplete = 1
Example of table 表的例子
T1 : recipe_requirement
ID 1708
RecipeID 498
MaterialObjectTypeID 383
Quantity 1
IsRegionItemRequired 0
T2 - recipe
ID 498
Name Beef Stew
StartingToolsID 1054
T3 - items
ID 5780
ContainerID 844
ObjectTypeID 383
Quantity 357
FeatureID 0
T1 is linked on T2 with value "498". T1在T2上链接,值为“498”。 T1 is linked on T3 with valude 383".
T1在T3上与valude 383“连接。
And in the same time : 并在同一时间:
T3 - items
ID 5780
ContainerID 844
ObjectTypeID 383
Quantity 357
FeatureID 0
T4 - objects_types
ID 383
Name Beef
T5 - movable_objects
ID 728
ObjectTypeID 104
RootContainerID 844
IsComplete 1
CustomNameId 4
T3 is linked on T4 with value "383". T3在T4上链接,值为“383”。
T3 is linked on T5 with value 844". T3在T5上链接,值为844“。
Solution i found : 解决方案我发现:
`SELECT
recipe_requirement.ID recipe_requirement_ID,
recipe_requirement.RecipeID recipe_requirement_RecipeID,
recipe_requirement.MaterialObjectTypeID recipe_requirement_MaterialObjectTypeID,
recipe_requirement.Quantity recipe_requirement_Quantity,
recipe_requirement.IsRegionItemRequired recipe_requirement_IsRegionItemRequired,
recipe.ID recipe_ID,
recipe.Name recipe_Name,
recipe.StartingToolsID recipe_StartingToolsID,
items.ID items_ID,
items.ContainerID items_ContainerID,
items.ObjectTypeID items_ObjectTypeID,
items.Quantity items_Quantity,
items.FeatureID items_FeatureID,
objects_types.ID objects_types_ID,
objects_types.Name objects_types_Name,
movable_objects.ID movable_objects_ID,
movable_objects.ObjectTypeID movable_objects_ObjectTypeID,
movable_objects.RootContainerID movable_objects_RootContainerID,
movable_objects.IsComplete movable_objects_IsComplete,
movable_objects.CustomNameId movable_objects_CustomNameId
FROM recipe_requirement
JOIN recipe ON recipe.ID = recipe_requirement.RecipeID
JOIN (items
JOIN objects_types ON objects_types.ID = items.ObjectTypeID
JOIN movable_objects ON movable_objects.RootContainerID = items.ContainerID
) ON items.ObjectTypeID = recipe_requirement.MaterialObjectTypeID`
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