SQL选择具有特定状态的特定学生的最新记录
请帮助我选择状态为1的每个学生的最新记录。我有一个名为SQL选择具有特定状态的特定学生的最新记录,sql,sql-server,Sql,Sql Server,请帮助我选择状态为1的每个学生的最新记录。我有一个名为stdData的表和列 Student ID FDate Status 12 2014-03-12 1 12 2014-03-15 1 13 2014-02-03 1 13 2014-02-04 0 13 2014-02-05 1 如何选择状态为1
stdData Student ID FDate Status
12 2014-03-12 1
12 2014-03-15 1
13 2014-02-03 1
13 2014-02-04 0
13 2014-02-05 1
如何选择状态为1的每个学生的最新记录？您需要使用
分组依据
select student_id, max(date)
from table_name
where status=1
group by student_id;
您需要使用分组依据
select student_id, max(date)
from table_name
where status=1
group by student_id;
您需要使用分组依据
select student_id, max(date)
from table_name
where status=1
group by student_id;
您需要使用分组依据
select student_id, max(date)
from table_name
where status=1
group by student_id;
在这个查询中，很明显，status=1
在我的select中添加了它，如下所示：
Select Student_ID ,max(Date) Date, 1 status From table1
where status = 1 Group by Student_ID;
在这个查询中，很明显，status=1
在我的select中添加了它，如下所示：
Select Student_ID ,max(Date) Date, 1 status From table1
where status = 1 Group by Student_ID;
在这个查询中，很明显，status=1
在我的select中添加了它，如下所示：
Select Student_ID ,max(Date) Date, 1 status From table1
where status = 1 Group by Student_ID;
在这个查询中，很明显，status=1
在我的select中添加了它，如下所示：
Select Student_ID ,max(Date) Date, 1 status From table1
where status = 1 Group by Student_ID;
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
试试这个
SELECT LAST(column_name) FROM table_name;
;with cte as
(
select *,rn=row_number() over(partition by Student_Id order by Date desc) from #t
)
select * from cte where rn=1 and status=1
如果您使用的是sql server，请尝试以下操作
Select top(1) * from StudentTable where status =1 order by student_id desc
如果您使用的是sql server，请尝试以下操作
Select top(1) * from StudentTable where status =1 order by student_id desc
如果您使用的是sql server，请尝试以下操作
Select top(1) * from StudentTable where status =1 order by student_id desc
如果您使用的是sql server，请尝试以下操作
Select top(1) * from StudentTable where status =1 order by student_id desc
在Sqlserver中
Create table Student(
ID int identity(1,1) primary key not null,
S_Date datetime,
Status bit
)
insert into Student values ('2014-03-11',1)
insert into Student values ('2014-03-12',0)
insert into Student values ('2014-03-13',1)
insert into Student values ('2014-03-14',0)
insert into Student values ('2014-03-15',1)
select top 1 * from Student where Status=1 Order By S_Date Desc
在Sqlserver中
Create table Student(
ID int identity(1,1) primary key not null,
S_Date datetime,
Status bit
)
insert into Student values ('2014-03-11',1)
insert into Student values ('2014-03-12',0)
insert into Student values ('2014-03-13',1)
insert into Student values ('2014-03-14',0)
insert into Student values ('2014-03-15',1)
select top 1 * from Student where Status=1 Order By S_Date Desc
在Sqlserver中
Create table Student(
ID int identity(1,1) primary key not null,
S_Date datetime,
Status bit
)
insert into Student values ('2014-03-11',1)
insert into Student values ('2014-03-12',0)
insert into Student values ('2014-03-13',1)
insert into Student values ('2014-03-14',0)
insert into Student values ('2014-03-15',1)
select top 1 * from Student where Status=1 Order By S_Date Desc
在Sqlserver中
Create table Student(
ID int identity(1,1) primary key not null,
S_Date datetime,
Status bit
)
insert into Student values ('2014-03-11',1)
insert into Student values ('2014-03-12',0)
insert into Student values ('2014-03-13',1)
insert into Student values ('2014-03-14',0)
insert into Student values ('2014-03-15',1)
select top 1 * from Student where Status=1 Order By S_Date Desc
您可以使用ROW\u NUMBER
功能来实现这一点：
SELECT Student_ID, Date , Status
FROM
(
SELECT ROW_NUMBER() OVER (PARTITION BY Student_ID ORDER BY Date DESC) AS rn, Student_ID, Date , Status
FROM your_table
WHERE Status = 1
) tab
WHERE tab.rn = 1
您可以使用ROW\u NUMBER
功能来实现这一点：
SELECT Student_ID, Date , Status
FROM
(
SELECT ROW_NUMBER() OVER (PARTITION BY Student_ID ORDER BY Date DESC) AS rn, Student_ID, Date , Status
FROM your_table
WHERE Status = 1
) tab
WHERE tab.rn = 1
您可以使用ROW\u NUMBER
功能来实现这一点：
SELECT Student_ID, Date , Status
FROM
(
SELECT ROW_NUMBER() OVER (PARTITION BY Student_ID ORDER BY Date DESC) AS rn, Student_ID, Date , Status
FROM your_table
WHERE Status = 1
) tab
WHERE tab.rn = 1
您可以使用ROW\u NUMBER
功能来实现这一点：
SELECT Student_ID, Date , Status
FROM
(
SELECT ROW_NUMBER() OVER (PARTITION BY Student_ID ORDER BY Date DESC) AS rn, Student_ID, Date , Status
FROM your_table
WHERE Status = 1
) tab
WHERE tab.rn = 1