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我很努力與SQL查詢轉換爲LINQ。SQL到LINQ與許多連接
這裏是SQL:
SELECT dbo.ORGANIZATION.ORGANIZATION_ID,
dbo.ORGANIZATION.ORGANIZATION_NAME,
dbo.PWR_ORGANIZATION_DIRECTORY.DIRECTORY_IDENTIFIER,
dbo.DETAIL_REQUIREMENT.DETAIL_ID,
dbo.DETAIL_REQUIREMENT.DETAIL_IDENTIFIER,
dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.DIRECTORY_ATTRIBUTE,
dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.ATTRIBUTE_VALIDATION,
dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.ATTRIBUTE_TRANSFORMATION,
dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.DETAIL_ACCESS
FROM dbo.ORGANIZATION INNER JOIN
dbo.DETAIL_REQUIREMENT ON dbo.ORGANIZATION.ORGANIZATION_ID = dbo.DETAIL_REQUIREMENT.ORGANIZATION_ID INNER JOIN
dbo.PWR_ORGANIZATION_DIRECTORY INNER JOIN
dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING ON dbo.PWR_ORGANIZATION_DIRECTORY.ORGANIZATION_ID = dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.ORGANIZATION_ID AND
dbo.PWR_ORGANIZATION_DIRECTORY.DIRECTORY_TYPE_ID = dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.DIRECTORY_TYPE_ID AND
dbo.PWR_ORGANIZATION_DIRECTORY.DIRECTORY_ID = dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.DIRECTORY_ID ON
dbo.DETAIL_REQUIREMENT.DETAIL_ID = dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.DETAIL_ID AND
dbo.ORGANIZATION.ORGANIZATION_ID = dbo.PWR_ORGANIZATION_DIRECTORY_MAPPING.ORGANIZATION_ID
WHERE dbo.ORGANIZATION.ORGANIZATION_ID = 0 AND
dbo.PWR_ORGANIZATION_DIRECTORY.DIRECTORY_ID = 1 AND
dbo.PWR_ORGANIZATION_DIRECTORY.DIRECTORY_TYPE_ID = 1
這就是我如何開始的,但是當有兩個弄糊塗了三個表之間連接:
var megaFetch = from org in context.Organizations
join detReq in context.DetailRequirements on org.OrganizationId equals detReq.OrganizationId
join detMap in context.OrganizationDirectoryMappings on org.OrganizationId equals detMap.OrganizationId &&
有人能指導我在這裏?
謝謝。
啊哈!就是這樣。 – DoomerDGR8