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问答- 问题:SQL-即使项目的计数为零，也返回所有行

SQL-即使项目的计数为零，也返回所有行

SQL-即使项目的计数为零，也返回所有行

修改第二个查询

SELECT Tree.Type as 'Requirement Type',
       COUNT(CASE WHEN [Tree].[creationDate] >= ('2010-01-01') and [Tree].[creationDate] < ('2020-01-01') THEN Tree.Type END) AS 'Number in Creation Range'
FROM [Tree] 
INNER JOIN @ReqType As RT on RT.Type = Tree.Type
INNER JOIN [Project_INFO]  ON [Project_INFO].[ProjectID]=[Tree].[Project_ID] 
INNER JOIN @CreationCount AS CCount ON CCount.BaselineID=Tree.Baseline_ID 
WHERE [Project_INFO].[Name] = 'Address Book' AND CCount.Name = 'Current Baseline' 
GROUP BY tree.Type
SQLServer 2022/1/1 18:40:43 有331人围观

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