/* 标题:按某字段合并字符串之一(简单合并) 作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开) 时间:2008-11-06 地点:广东深圳描述:将如下形式的数据按id字段合并value字段。 id value ----- ------ 1 aa 1 bb 2 aaa 2 bbb 2 ccc 需要得到结果: id value ------ ----------- 1 aa,bb 2 aaa,bbb,ccc 即:group by id, 求 value 的和(字符串相加) */ --1、sql2000中只能用自定义的函数解决 create table tb(id int, value varchar(10)) insert into tb values(1, 'aa') insert into tb values(1, 'bb') insert into tb values(2, 'aaa') insert into tb values(2, 'bbb') insert into tb values(2, 'ccc') gocreate function dbo.f_str(@id int) returns varchar(100) as begin declare @str varchar(1000) set @str = '' select @str = @str + ',' + cast(value as varchar) from tb where id = @id set @str = right(@str , len(@str) - 1) return @str end go--调用函数 select id , value = dbo.f_str(id) from tb group by iddrop function dbo.f_str drop table tb
SELECT s.dataD_name AS 节次, a.arrangement_week, a.arrangement_grade, a.arrangement_dept_id, isnull(max(CASE a.arrangement_day WHEN '1' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Mon, isnull(max(CASE a.arrangement_day WHEN '2' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Tue, isnull(max(CASE a.arrangement_day WHEN '3' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Wed, isnull(max(CASE a.arrangement_day WHEN '4' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Thu, isnull(max(CASE a.arrangement_day WHEN '5' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Fri, isnull(max(CASE a.arrangement_day WHEN '6' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Sat, isnull(max(CASE a.arrangement_day WHEN '7' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Sun, a.arrangement_course_type FROM dbo.d_arrangement AS a RIGHT JOIN dbo.s_dataD AS s ON s.dataD_id >= a.arrangement_festival_start_dataD_id AND s.dataD_id <= a.arrangement_festival_end_dataD_id LEFT JOIN dbo.b_course AS b ON b.course_id = a.arrangement_course_id LEFT JOIN dbo.b_teacher AS t ON a.arrangement_teacher_id = t.teacher_id left join b_dept dept on dept.dept_id=a.arrangement_dept_id WHERE (s.dataD_kind = 7) AND (s.dataD_id <> 700) and a.arrangement_dept_id=2 GROUP BY s.dataD_name, a.arrangement_day, a.arrangement_festival_start_dataD_id, a.arrangement_course_id, b.course_name, t.teacher_name, s.dataD_id, a.arrangement_week, a.arrangement_grade, a.arrangement_dept_id, a.arrangement_course_type
SELECT [节次],[grade],max([Mon]),max([Tue]),max([Wed] ),max([Thu] ),max([Fri]) FROM [TB] group by [节次],[grade]
标题:按某字段合并字符串之一(简单合并)
作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间:2008-11-06
地点:广东深圳描述:将如下形式的数据按id字段合并value字段。
id value
----- ------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
需要得到结果:
id value
------ -----------
1 aa,bb
2 aaa,bbb,ccc
即:group by id, 求 value 的和(字符串相加)
*/
--1、sql2000中只能用自定义的函数解决
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
gocreate function dbo.f_str(@id int) returns varchar(100)
as
begin
declare @str varchar(1000)
set @str = ''
select @str = @str + ',' + cast(value as varchar) from tb where id = @id
set @str = right(@str , len(@str) - 1)
return @str
end
go--调用函数
select id , value = dbo.f_str(id) from tb group by iddrop function dbo.f_str
drop table tb
节次 grade Mon Tue Wed Thu Fri
------- ------ ------------ ------------ ------------- -------------- ------
第一节 2011 test (xx老师) - - - -
第二节 2011 test (xx老师) - - - -
第三节 2011 - test (xx老师) - - -
第四节 2011 - test (xx老师) - - -
第五节 2011 test (xx老师) - - - -
第六节 2011 test (xx老师) test (xx老师) test (xx老师) test (xx老师) - - -
要的是这效果
------- ------ ------------ ------------ ------------- -------------- ------
晚间 2011 - test (xx老师) - - -
晚间 2011 - - test (xx老师) - -
晚间 2011 - - - test (xx老师) -
转变成以下 节次 grade Mon Tue Wed Thu Fri
------- ------ ------------ ------------ ------------- -------------- ------
晚间 2011 - test (xx老师) test (xx老师) test (xx老师) - -
SELECT s.dataD_name AS 节次, a.arrangement_week, a.arrangement_grade, a.arrangement_dept_id,
isnull(max(CASE a.arrangement_day WHEN '1' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Mon,
isnull(max(CASE a.arrangement_day WHEN '2' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Tue,
isnull(max(CASE a.arrangement_day WHEN '3' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Wed,
isnull(max(CASE a.arrangement_day WHEN '4' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Thu,
isnull(max(CASE a.arrangement_day WHEN '5' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Fri,
isnull(max(CASE a.arrangement_day WHEN '6' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Sat,
isnull(max(CASE a.arrangement_day WHEN '7' THEN max(b.course_name) + ' (' + max(t .teacher_name) + ')' ELSE '-' END),'') AS Sun, a.arrangement_course_type
FROM dbo.d_arrangement AS a RIGHT JOIN
dbo.s_dataD AS s ON s.dataD_id >= a.arrangement_festival_start_dataD_id AND
s.dataD_id <= a.arrangement_festival_end_dataD_id LEFT JOIN
dbo.b_course AS b ON b.course_id = a.arrangement_course_id LEFT JOIN
dbo.b_teacher AS t ON a.arrangement_teacher_id = t.teacher_id left join b_dept dept on dept.dept_id=a.arrangement_dept_id
WHERE (s.dataD_kind = 7) AND (s.dataD_id <> 700) and a.arrangement_dept_id=2
GROUP BY s.dataD_name, a.arrangement_day, a.arrangement_festival_start_dataD_id, a.arrangement_course_id, b.course_name, t.teacher_name, s.dataD_id,
a.arrangement_week, a.arrangement_grade, a.arrangement_dept_id, a.arrangement_course_type
FROM [TB]
group by [节次],[grade]
你这直接加上2个max(),sql报错---不能对包含聚合或子查询的表达式执行聚合函数。