如何使用sql查询按日期获取学生出勤状态？

Question

在我的数据库中，我有此数据。现在，我想根据日期和按roll_number分组查询和获取数据。我可以使用

获取所有数据

select * from attendance_records where intake='36-1' 

但是我找不到我想要的。我正在学习数据库和SQL。我使用了如下所示的分组选项，但结果不是我想要的。请让我知道我如何获得我在第二张照片中添加的结果。这将对我的数据库学习有很好的帮助。

select * from attendance_records where intake='36-1' group by date

但是以上查询仅提供一个学生信息。我找不到我想要的。

1st pic: My Database Table

2nd pic: I want this result using SQL query

Answer 1

此作品：

SELECT * INTO #attendance_records 
FROM
(
SELECT 69 ID,'snaha sadhu' student_name, 16 roll_number, '36-1' intake, 1 attendence_status, CONVERT(VARCHAR(10), getdate(), 103) date 
UNION ALL
SELECT 70 ID,'keya' student_name, 37 roll_number, '36-1' intake, 0 attendence_status, CONVERT(VARCHAR(10), getdate(), 103) date
union
SELECT 69 ID,'snaha sadhu' student_name, 16 roll_number, '36-1' intake, 1 attendence_status, CONVERT(VARCHAR(10), dateadd(day,1,getdate()), 103) date 
UNION ALL
SELECT 70 ID,'keya' student_name, 37 roll_number, '36-1' intake, 1 attendence_status, CONVERT(VARCHAR(10), dateadd(day,1,getdate()), 103)  date
)TAB

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)
SELECT @ColumnName= ISNULL(@ColumnName + ',','') + '[' + [date] + ']'
FROM (select distinct [date] from #attendance_records) s

SET @DynamicPivotQuery = 
  N'select *, cast(CONVERT(DECIMAL(18,2),CONVERT(DECIMAL(18,2),' + @ColumnName + ')/CONVERT(DECIMAL(18,2),(select COUNT(distinct [date]) from #attendance_records)))*100 as varchar(10))+''%''
 from 
(SELECT student_name, roll_number, intake, ' + @ColumnName + '
 FROM #attendance_records       
        PIVOT(      sum(attendence_status)            
            FOR [date] IN (' + @ColumnName + ')) 
            AS P) x'

EXEC sp_executesql @DynamicPivotQuery