Query and GROUP BY

Hi
I am stuck!
I have the following table:
CREATE TABLE HISTORY
(
PRODUCT_CODE int NOT NULL,
PRODUCT_QTY int NOT NULL,
SALE_TIMESTAMP datetime NOT NULL,
CONSTRAINT H1 PRIMARY KEY (PRODUCT_CODE, REC_TIMESTAMP)
)
go
I want to create the following procedure to list the most recent sale
of each product, before a particular timestamp:
CREATE PROCEDURE sp_get_sales @.product_code int, @.sale_timestamp
datetime
AS
BEGIN
SELECT PRODUCT_CODE, PRODUCT_QTY, MAX(SALE_TIMESTAMP) FROM HISTORY
WHERE (PRODUCT_CODE = @.product_code) AND (SALE_TIMESTAMP <=
@.sale_timestamp)
GROUP BY PRODUCT_CODE
END
go
However, this fails to create with:
Msg 8120 Column 'PRODUCT_QTY' is invalid in the select list because it
is not contained in either an aggregate function or the GROUP BY
clause.
How can I write a proc to do this, but still include the PRODUCT_QTY
column in the output?
thanks,
NeilAssuming that if two sales occur at exactly the same, you want just one of
them:
CREATE PROCEDURE sp_get_sales @.product_code int, @.sale_timestamp
datetime
AS
BEGIN
SELECT TOP 1
PRODUCT_CODE, PRODUCT_QTY, SALE_TIMESTAMP
FROM
HISTORY
WHERE
(PRODUCT_CODE = @.product_code)
AND (SALE_TIMESTAMP <= @.sale_timestamp)
ORDER BY
SALE_TIMESTAMP DESC
END
go
Tom
----
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA, MCITP, MCTS
SQL Server MVP
Toronto, ON Canada
.
"neilsolent" <neil@.solenttechnology.co.uk> wrote in message
news:1172787732.437425.198610@.n33g2000cwc.googlegroups.com...
Hi
I am stuck!
I have the following table:
CREATE TABLE HISTORY
(
PRODUCT_CODE int NOT NULL,
PRODUCT_QTY int NOT NULL,
SALE_TIMESTAMP datetime NOT NULL,
CONSTRAINT H1 PRIMARY KEY (PRODUCT_CODE, REC_TIMESTAMP)
)
go
I want to create the following procedure to list the most recent sale
of each product, before a particular timestamp:
CREATE PROCEDURE sp_get_sales @.product_code int, @.sale_timestamp
datetime
AS
BEGIN
SELECT PRODUCT_CODE, PRODUCT_QTY, MAX(SALE_TIMESTAMP) FROM HISTORY
WHERE (PRODUCT_CODE = @.product_code) AND (SALE_TIMESTAMP <=
@.sale_timestamp)
GROUP BY PRODUCT_CODE
END
go
However, this fails to create with:
Msg 8120 Column 'PRODUCT_QTY' is invalid in the select list because it
is not contained in either an aggregate function or the GROUP BY
clause.
How can I write a proc to do this, but still include the PRODUCT_QTY
column in the output?
thanks,
Neil