[英]SQL Server- PIVOT table. transform row into columns
I am trying to convert rows into columns. 我正在尝试将行转换为列。 here is my query 这是我的查询
SELECT M.urn,
M.eventdate,
M.eventlocation,
M.eventroom,
M.eventbed,
N.time
FROM admpatevents M
INNER JOIN admpattransferindex N
ON M.urn = N.urn
AND M.eventseqno = N.eventseqno
AND M.eventdate = N.eventdate
WHERE M.urn = 'F1002754364'
AND M.eventcode = 'TFRADMIN'
Current result 当前结果
URN Date Location Room Bed Time F1002754364 20121101 EDEXPRESS 4-152 02 0724 F1002754364 20121101 CARDSURG 3-110 02 1455 F1002754364 20121102 CHEST UNIT 6-129-GL04 1757
required result 所需结果
F1002754364 20121101 EDEXPRESS 4-152 02 0724 20121101 CARDSURG 3-110 02 1455 20121102 CHEST UNIT 6-129-GL 04 1757
Thanks for your help. 谢谢你的帮助。
Since you are using SQL Server you can use both the UNPIVOT
and PIVOT
functions to transform this data. 由于使用的是SQL Server,因此可以同时使用UNPIVOT
和PIVOT
函数来转换此数据。 If you know how many values to you will have then you can hard-code the values similar to this: 如果您知道将要包含多少个值,则可以使用类似于以下内容的方式对值进行硬编码:
select *
from
(
select urn,
value,
col +'_'+ CAST(rn as varchar(10)) as col
from
(
SELECT M.urn,
cast(M.eventdate as varchar(50)) eventdate,
M.eventlocation,
M.eventroom,
M.eventbed,
cast(N.time as varchar(50)) time,
ROW_NUMBER() over(PARTITION by m.urn order by m.eventdate) rn
FROM admpatevents M
INNER JOIN admpattransferindex N
ON M.urn = N.urn
AND M.eventseqno = N.eventseqno
AND M.eventdate = N.eventdate
WHERE M.urn = 'F1002754364'
AND M.eventcode = 'TFRADMIN'
) src1
unpivot
(
value
for col in (eventdate, eventlocation, eventroom, eventbed, time)
) unpiv
) src2
pivot
(
max(value)
for col in ([eventdate_1], [eventlocation_1], [eventroom_1], [eventbed_1], [time_1],
[eventdate_2], [eventlocation_2], [eventroom_2], [eventbed_2], [time_2],
[eventdate_3], [eventlocation_3], [eventroom_3], [eventbed_3], [time_3])
) piv
Note- not tested 注意-未测试
If you have an unknown number of columns, then you can use dynamic sql similar to this: 如果列数未知,则可以使用类似于以下内容的动态sql:
DECLARE @query AS NVARCHAR(MAX),
@colsPivot as NVARCHAR(MAX)
select @colsPivot = STUFF((SELECT ','
+ quotename(c.name +'_'+ cast(t.rn as varchar(10)))
from
(
select ROW_NUMBER() over(PARTITION by m.urn order by m.eventdate) rn
FROM admpatevents M
INNER JOIN admpattransferindex N
ON M.urn = N.urn
AND M.eventseqno = N.eventseqno
AND M.eventdate = N.eventdate
WHERE M.urn = 'F1002754364'
) t
cross apply sys.columns as C
where C.object_id IN (object_id('admpatevents'), object_id('admpattransferindex')) and
C.name not in ('urn') -- add any other columns your want to exclude
group by c.name, t.rn
order by t.rn
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query
= 'select *
from
(
select urn, value, col +''_''+ CAST(rn as varchar(10)) as col
from
(
SELECT M.urn,
cast(M.eventdate as varchar(20)) eventdate,
M.eventlocation,
M.eventroom,
M.eventbed,
cast(N.time as varchar(20)) time,
ROW_NUMBER() over(PARTITION by m.urn order by m.eventdate) rn
FROM admpatevents M
INNER JOIN admpattransferindex N
ON M.urn = N.urn
AND M.eventseqno = N.EVENTseqno
AND M.eventdate = N.eventdate
WHERE M.urn = ''F1002754364''
) x
unpivot
(
value
for col in (eventdate, eventlocation, eventroom, eventbed, time)
) u
) x1
pivot
(
max(value)
for col in ('+ @colspivot +')
) p'
exec(@query)
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