t sql derive column based on date of row
1
I apologise for asking a question I'm sure is answered many times over but I can't quite word it to search for it. Even a link to a similar problem would be much appreciated.
If I have a table like so:
+----+----------+-----+
|Name|Date |Score|
+----+----------+-----+
| Tom|2018-20-11| 100|
| Tom|2018-13-11| 95|
+----+----------+-----+
how would I query this so that each row would show a column for score today, score one week ago etc.? In this example with sample data it would be one row e.g.
+----+----------+-----------+
|Name|ScoreToday|Score-7Days|
+----+----------+-----------+
| Tom| 100| 95|
+----+----------+-----------+
I've seen similar problems solved via cross apply buy I can't work it out. Thanks for your help :)
Some sample code:
if exists (select * from sys.tables where name = 'test') drop table test
go
create table test (
Name varchar(128)
, AsAt datetime
, Score int
)
insert test values ('Tom', getdate(), 87)
, ('Tom', getdate() - 2, 100)
, ('Tom', getdate() - 7, 95)
, ('Tom', getdate() - 1, 81)
, ('Tom', getdate() - 30, 95)
sql
sql-server tsql pivot asked Nov 20 at 19:40
beehive
265
add a comment |
1
I apologise for asking a question I'm sure is answered many times over but I can't quite word it to search for it. Even a link to a similar problem would be much appreciated.
If I have a table like so:
+----+----------+-----+
|Name|Date |Score|
+----+----------+-----+
| Tom|2018-20-11| 100|
| Tom|2018-13-11| 95|
+----+----------+-----+
how would I query this so that each row would show a column for score today, score one week ago etc.? In this example with sample data it would be one row e.g.
+----+----------+-----------+
|Name|ScoreToday|Score-7Days|
+----+----------+-----------+
| Tom| 100| 95|
+----+----------+-----------+
I've seen similar problems solved via cross apply buy I can't work it out. Thanks for your help :)
Some sample code:
if exists (select * from sys.tables where name = 'test') drop table test
go
create table test (
Name varchar(128)
, AsAt datetime
, Score int
)
insert test values ('Tom', getdate(), 87)
, ('Tom', getdate() - 2, 100)
, ('Tom', getdate() - 7, 95)
, ('Tom', getdate() - 1, 81)
, ('Tom', getdate() - 30, 95)
sql
sql-server tsql pivot asked Nov 20 at 19:40
beehive
265
1
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59
add a comment |
1
1
1
I apologise for asking a question I'm sure is answered many times over but I can't quite word it to search for it. Even a link to a similar problem would be much appreciated.
If I have a table like so:
+----+----------+-----+
|Name|Date |Score|
+----+----------+-----+
| Tom|2018-20-11| 100|
| Tom|2018-13-11| 95|
+----+----------+-----+
how would I query this so that each row would show a column for score today, score one week ago etc.? In this example with sample data it would be one row e.g.
+----+----------+-----------+
|Name|ScoreToday|Score-7Days|
+----+----------+-----------+
| Tom| 100| 95|
+----+----------+-----------+
I've seen similar problems solved via cross apply buy I can't work it out. Thanks for your help :)
Some sample code:
if exists (select * from sys.tables where name = 'test') drop table test
go
create table test (
Name varchar(128)
, AsAt datetime
, Score int
)
insert test values ('Tom', getdate(), 87)
, ('Tom', getdate() - 2, 100)
, ('Tom', getdate() - 7, 95)
, ('Tom', getdate() - 1, 81)
, ('Tom', getdate() - 30, 95)
sql
sql-server tsql pivot asked Nov 20 at 19:40
beehive
265
I apologise for asking a question I'm sure is answered many times over but I can't quite word it to search for it. Even a link to a similar problem would be much appreciated.
If I have a table like so:
+----+----------+-----+
|Name|Date |Score|
+----+----------+-----+
| Tom|2018-20-11| 100|
| Tom|2018-13-11| 95|
+----+----------+-----+
how would I query this so that each row would show a column for score today, score one week ago etc.? In this example with sample data it would be one row e.g.
+----+----------+-----------+
|Name|ScoreToday|Score-7Days|
+----+----------+-----------+
| Tom| 100| 95|
+----+----------+-----------+
I've seen similar problems solved via cross apply buy I can't work it out. Thanks for your help :)
Some sample code:
if exists (select * from sys.tables where name = 'test') drop table test
go
create table test (
Name varchar(128)
, AsAt datetime
, Score int
)
insert test values ('Tom', getdate(), 87)
, ('Tom', getdate() - 2, 100)
, ('Tom', getdate() - 7, 95)
, ('Tom', getdate() - 1, 81)
, ('Tom', getdate() - 30, 95)
sql
sql-server tsql pivot sql
sql-server tsql pivot asked Nov 20 at 19:40
beehive
265
asked Nov 20 at 19:40
beehive
265
edited Nov 20 at 20:55
asked Nov 20 at 19:40
beehive
265
asked Nov 20 at 19:40
beehive
265
asked Nov 20 at 19:40
beehive
265
265
1
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59
add a comment |
1
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59
1
1
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59
add a comment |
1 Answer
1
active
oldest
votes
0
I think you are looking for
CREATE TABLE T
([Name] varchar(4), [Date] datetime, [Score] int);
INSERT INTO T
([Name], [Date], [Score])
VALUES
('Tom', '2018-11-20 00:00:00', 100),
('Tom', '2018-11-13 00:00:00', 95),
('Sami', '2018-11-13 00:00:00', 55),
('Sami', '2018-11-15 00:00:00', 44);
DECLARE @Dates NVARCHAR(MAX) = '';
DECLARE @SQL NVARCHAR(MAX);
SELECT @Dates = @Dates + ',' + QUOTENAME([Date])
FROM T
GROUP BY [Date];
SET @Dates = STUFF(@Dates, 1, 1, '');
SET @SQL = N' SELECT * FROM(SELECT * FROM T) TT PIVOT( MAX(Score) FOR [Date] IN ('+ @Dates +')) PVT;';
EXECUTE sp_executesql @SQL;
Returns:
+------+---------------------+---------------------+---------------------+
| Name | Nov 13 2018 12:00AM | Nov 15 2018 12:00AM | Nov 20 2018 12:00AM |
+------+---------------------+---------------------+---------------------+
| Sami | 55 | 44 | |
| Tom | 95 | | 100 |
+------+---------------------+---------------------+---------------------+
Demo
answered Nov 20 at 21:00
Sami
7,27431039
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
I think you are looking for
CREATE TABLE T
([Name] varchar(4), [Date] datetime, [Score] int);
INSERT INTO T
([Name], [Date], [Score])
VALUES
('Tom', '2018-11-20 00:00:00', 100),
('Tom', '2018-11-13 00:00:00', 95),
('Sami', '2018-11-13 00:00:00', 55),
('Sami', '2018-11-15 00:00:00', 44);
DECLARE @Dates NVARCHAR(MAX) = '';
DECLARE @SQL NVARCHAR(MAX);
SELECT @Dates = @Dates + ',' + QUOTENAME([Date])
FROM T
GROUP BY [Date];
SET @Dates = STUFF(@Dates, 1, 1, '');
SET @SQL = N' SELECT * FROM(SELECT * FROM T) TT PIVOT( MAX(Score) FOR [Date] IN ('+ @Dates +')) PVT;';
EXECUTE sp_executesql @SQL;
Returns:
+------+---------------------+---------------------+---------------------+
| Name | Nov 13 2018 12:00AM | Nov 15 2018 12:00AM | Nov 20 2018 12:00AM |
+------+---------------------+---------------------+---------------------+
| Sami | 55 | 44 | |
| Tom | 95 | | 100 |
+------+---------------------+---------------------+---------------------+
Demo
answered Nov 20 at 21:00
Sami
7,27431039
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
add a comment |
0
I think you are looking for
CREATE TABLE T
([Name] varchar(4), [Date] datetime, [Score] int);
INSERT INTO T
([Name], [Date], [Score])
VALUES
('Tom', '2018-11-20 00:00:00', 100),
('Tom', '2018-11-13 00:00:00', 95),
('Sami', '2018-11-13 00:00:00', 55),
('Sami', '2018-11-15 00:00:00', 44);
DECLARE @Dates NVARCHAR(MAX) = '';
DECLARE @SQL NVARCHAR(MAX);
SELECT @Dates = @Dates + ',' + QUOTENAME([Date])
FROM T
GROUP BY [Date];
SET @Dates = STUFF(@Dates, 1, 1, '');
SET @SQL = N' SELECT * FROM(SELECT * FROM T) TT PIVOT( MAX(Score) FOR [Date] IN ('+ @Dates +')) PVT;';
EXECUTE sp_executesql @SQL;
Returns:
+------+---------------------+---------------------+---------------------+
| Name | Nov 13 2018 12:00AM | Nov 15 2018 12:00AM | Nov 20 2018 12:00AM |
+------+---------------------+---------------------+---------------------+
| Sami | 55 | 44 | |
| Tom | 95 | | 100 |
+------+---------------------+---------------------+---------------------+
Demo
answered Nov 20 at 21:00
Sami
7,27431039
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
add a comment |
0
0
0
I think you are looking for
CREATE TABLE T
([Name] varchar(4), [Date] datetime, [Score] int);
INSERT INTO T
([Name], [Date], [Score])
VALUES
('Tom', '2018-11-20 00:00:00', 100),
('Tom', '2018-11-13 00:00:00', 95),
('Sami', '2018-11-13 00:00:00', 55),
('Sami', '2018-11-15 00:00:00', 44);
DECLARE @Dates NVARCHAR(MAX) = '';
DECLARE @SQL NVARCHAR(MAX);
SELECT @Dates = @Dates + ',' + QUOTENAME([Date])
FROM T
GROUP BY [Date];
SET @Dates = STUFF(@Dates, 1, 1, '');
SET @SQL = N' SELECT * FROM(SELECT * FROM T) TT PIVOT( MAX(Score) FOR [Date] IN ('+ @Dates +')) PVT;';
EXECUTE sp_executesql @SQL;
Returns:
+------+---------------------+---------------------+---------------------+
| Name | Nov 13 2018 12:00AM | Nov 15 2018 12:00AM | Nov 20 2018 12:00AM |
+------+---------------------+---------------------+---------------------+
| Sami | 55 | 44 | |
| Tom | 95 | | 100 |
+------+---------------------+---------------------+---------------------+
Demo
answered Nov 20 at 21:00
Sami
7,27431039
I think you are looking for
CREATE TABLE T
([Name] varchar(4), [Date] datetime, [Score] int);
INSERT INTO T
([Name], [Date], [Score])
VALUES
('Tom', '2018-11-20 00:00:00', 100),
('Tom', '2018-11-13 00:00:00', 95),
('Sami', '2018-11-13 00:00:00', 55),
('Sami', '2018-11-15 00:00:00', 44);
DECLARE @Dates NVARCHAR(MAX) = '';
DECLARE @SQL NVARCHAR(MAX);
SELECT @Dates = @Dates + ',' + QUOTENAME([Date])
FROM T
GROUP BY [Date];
SET @Dates = STUFF(@Dates, 1, 1, '');
SET @SQL = N' SELECT * FROM(SELECT * FROM T) TT PIVOT( MAX(Score) FOR [Date] IN ('+ @Dates +')) PVT;';
EXECUTE sp_executesql @SQL;
Returns:
+------+---------------------+---------------------+---------------------+
| Name | Nov 13 2018 12:00AM | Nov 15 2018 12:00AM | Nov 20 2018 12:00AM |
+------+---------------------+---------------------+---------------------+
| Sami | 55 | 44 | |
| Tom | 95 | | 100 |
+------+---------------------+---------------------+---------------------+
Demo
answered Nov 20 at 21:00
Sami
7,27431039
edited Nov 20 at 21:10
answered Nov 20 at 21:00
Sami
7,27431039
answered Nov 20 at 21:00
Sami
7,27431039
answered Nov 20 at 21:00
Sami
7,27431039
7,27431039
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
add a comment |
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
This is almost it, is the dynamic sql for picking up the dates? Because if it can be done without dynamic sql, I will always be picking a certain number of days previous to today. Thanks for your help
– beehive
Nov 20 at 22:14
add a comment |
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1
How many dates can be there per Name in the input table?
– Pawan Kumar
Nov 20 at 19:46
Are you wanting to combine and aggregate? Or do you just want to pivot rows into columns?
– pmbAustin
Nov 20 at 19:48
Would it always be 7 days back from today? Or todays score and the score within the last 7 days or that?
– Tim Mylott
Nov 20 at 19:53
This is called Pivot. Plenty of examples on stackoverflow.
– Zohar Peled
Nov 20 at 20:11
Thanks for suggestions, there will be many dates, I want a few samples, I don't think I want to aggregate, just want a row taking certain dates as columns e.g. one week ago, one month ago, 3 months ago If it can be done in either pivot/unpivot/cross apply I'd like to see it in this example I would appreciate that. Thanks
– beehive
Nov 20 at 20:59