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[英]Select Two different values from the same column in MySQL and show results
[英]Two different values from same column as seperate columns return same results
我有一個查詢,其中我從一列中得出2個值,作為兩個單獨的列,每個列都有不同的值。 我的查詢為這兩列返回相同的值。 但是我需要為每個獲取不同的值。 第一個“勞動強度”返回“需求ID”的結果,並且得到正確的值。
我在這兩列之前用*標記。
select
document.id AS API_ID,
document.name AS NAME,
document.description AS DESCRIPTION,
document.documentKey AS DOCUMENT_KEY,
docs.sequence AS SEQUENCE,
documentcustomfieldvalue.documentId AS DOCUMENT_ID,
*MAX(CASE WHEN documenttypefielddefinition.label = 'Labor Intensity' THEN textValue ELSE NULL END) AS DARBIETILPIBA,
*MAX(CASE WHEN documenttypefielddefinition.label = 'Requirements ID' THEN textValue ELSE NULL END) AS PRASIBAS_ID,
from document
join (select doc.id, doc.name, dn.sequence, dn.globalSortOrder
from document doc, documentnode dn
where doc.projectId = 20249 -- report_projectId
and dn.scopeId = 5
and dn.refId = doc.id
and dn.baseLineId is null
and dn.sequence like '2%') docs on docs.id = document.id
join project on document.projectId= project.id
left join documentcustomfieldvalue on documentcustomfieldvalue.documentId = document.id
left join documenttype on document.documentTypeId = documenttype.id
left join documenttypefielddefinition on documenttype.id = documenttypefielddefinition.documentTypeId
left join documentfield on documenttypefielddefinition.documentFieldId = documentfield.id
left join userbase on documentcustomfieldvalue.textValue = userbase.id
where document.projectId = project.id
and document.active = 'T' and documenttypefielddefinition.label IN ('Labor Intensity','Requirements ID')
group by docs.sequence
order by docs.globalSortOrder
導致該值重復的錯誤是什么? 如果我在where語句中僅保留“勞動強度”,那么它仍然為我提供“勞動強度”值的“需求ID”值。
如果您聽不懂某些內容,請讓我澄清一下。 謝謝!
我弄清楚出了什么問題。 一個左聯接是錯誤的,需要其他設置。
當前的左聯接正在運行。
left join documenttype on document.documentTypeId = documenttype.id
left join documenttypefielddefinition on documenttype.id = documenttypefielddefinition.documentTypeId
left join documentfield on documenttypefielddefinition.documentFieldId = documentfield.id
left join documentcustomfieldvalue on document.id = documentcustomfieldvalue.documentId
and documentfield.id = documentcustomfieldvalue.fieldId
left join userbase on documentcustomfieldvalue.textValue = userbase.id
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