Insert data into temp table, multiple columns from one Table - sql

Question

I have a table with columns: ID (Int), Date (Date) and Price (Decimal). Date column is in format 2013-04-14:
Table Example
ID Date Price
1 2012/05/02 23.5
1 2012/05/03 25.2
1 2012/05/04 22.5
1 2012/05/05 22.2
1 2012/05/06 26.5
2 2012/05/02 143.5
2 2012/05/03 145.2
2 2012/05/04 142.2
2 2012/05/05 146.5
3 2012/05/02 83.5
3 2012/05/03 85.2
3 2012/05/04 80.5
Query Example:
I want to be able to select all ID1 and ID3's data between a date range from the table and have this in a table with three columns, ordered by Date column. Also I would want to insert this into a temporary table to perform mathematical calculations on the data. Please comment if there is a better way.
Correct Result Example
Date ID1 ID3
2012-05-02 23.5 83.5
2012-05-03 25.2 85.2
2012-05-04 22.5 80.2
Any help and advice will be appreciated,
Thanks

Answer 1

Try the following.
CREATE TABLE #temp (
Date date,
x money,
y money
)
;
SELECT
Date,
MAX(CASE WHEN id=1 THEN price END) AS x,
MAX(CASE WHEN id=3 THEN price END) AS y
FROM Top40
WHERE Date BETWEEN '2012-05-02' AND '2012-05-04'
GROUP BY
Date
;
See SQL Fiddle for working example
EDIT:
To use the LAG window function on the x and y columns, you'll have to use a common table expression or CTE first.
WITH prices AS(
SELECT
Date as myDate,
MAX(CASE WHEN id=1 THEN price END) AS x,
MAX(CASE WHEN id=3 THEN price END) AS y
FROM Top40
WHERE Date BETWEEN '2012-05-02' AND '2012-05-04'
GROUP BY
Date
)
SELECT
myDate,
p.x,
(p.x/(LAG(p.x) OVER (ORDER BY MyDate))-1) as x_return,
p.y,
(p.y/(LAG(p.y) OVER (ORDER BY MyDate))-1) as y_return
FROM prices p
ORDER BY
myDate
;
See new SQL Fiddle for example.

Answer 2

The simplest way to do it in code (although it may not perform well with large data sets) is to do something like:
SELECT [Date], x = MAX(CASE WHEN ID = 1 THEN PRICE END)
, y = MAX(CASE WHEN ID = 3 THEN PRICE END)
INTO #tmp
FROM Top40
GROUP BY [Date]

Answer 3

Or...
select Date , t1.Price as Stock_1_Price , t2.Price as Stock_3_price
from ( select "Date" , max(Price) as Price from myData where ID = 1 group by "Date" ) t1
full join ( select "Date" , max(Price) as Price from myData where ID = 3 group by "Date" ) t2 on t2.Date = t1.Date
As far as populating a temp table, any of the usual ways works:
Table variable:
declare #work table
(
yyyymmdd varchar(32) not null ,
stock_1_price money null ,
stock_3_price money null
)
insert #work ( yyyymmdd , stock_1_price , stock_3_price )
select Date , t1.Price as Stock_1_Price , t2.Price as Stock_3_price
from ( select "Date" , max(Price) as Price from myData where ID = 1 group by "Date" ) t1
full join ( select "Date" , max(Price) as Price from myData where ID = 3 group by "Date" ) t2 on t2.Date = t1.Date
Declared temp table in tempdb
create table #work
(
yyyymmdd varchar(32) not null primary key clustered ,
stock_1_price money null ,
stock_3_price money null
)
insert #work ( yyyymmdd , stock_1_price , stock_3_price )
select Date , t1.Price as Stock_1_Price , t2.Price as Stock_3_price
from ( select "Date" , max(Price) as Price from myData where ID = 1 group by "Date" ) t1
full join ( select "Date" , max(Price) as Price from myData where ID = 3 group by "Date" ) t2 on t2.Date = t1.Date
non-declare temp table in tempdb via select into:
select Date , t1.Price as Stock_1_Price , t2.Price as Stock_3_price
into #work
from ( select "Date" , max(Price) as Price from myData where ID = 1 group by "Date" ) t1
full join ( select "Date" , max(Price) as Price from myData where ID = 3 group by "Date" ) t2 on t2.Date = t1.Date