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Alias Names

Author

Topic

pravin14u
Posting Yak Master

246 Posts

Posted - 2006-11-20 : 09:34:14

We have two subqueries returning two recordsets with the same set of columns.

When we try to Union both using UNION, we are unable to specify the alias names for the sub queries.

I have given the query below. The Alias names are 'Current_Week' and 'Previous_Week', It shows syntax error near Current_Week.

SELECT Previous_Week.account_id, Previous_Week.sabre_log_id as ps, Previous_Week.outlet_count as po, Current_Week.outlet_count as ci,
Current_Week.sabre_log_id as cs

FROM

SELECT * FROM
(
SELECT account_id, outlet_count, sabre_log_id
FROM tbl_sabre_load_log
WHERE sabre_log_id in

(
SELECT max(sabre_log_id) as "sec_log" FROM
tbl_sabre_load_log WHERE sabre_log_id NOT IN
(SELECT max(sabre_log_id)
FROM tbl_sabre_load_log
GROUP BY account_id
)
GROUP BY account_id
)
)

UNION ALL

(
SELECT account_id, outlet_count, sabre_log_id
FROM tbl_sabre_load_log
WHERE sabre_log_id in

(SELECT max(sabre_log_id)
FROM tbl_sabre_load_log
GROUP BY account_id
)
)

WHERE
Previous_Week.account_id = Current_Week.account_id

Can u please suggest a solution?

Thanks

harsh_athalye
Master Smack Fu Yak Hacker

5581 Posts

Posted - 2006-11-20 : 09:49:15

[code]SELECT account_id, sabre_log_id as ps,
outlet_count as po
FROM
(
SELECT account_id, outlet_count, sabre_log_id
FROM tbl_sabre_load_log
WHERE sabre_log_id in
(
SELECT max(sabre_log_id) as "sec_log" FROM
tbl_sabre_load_log
WHERE sabre_log_id NOT IN
(SELECT max(sabre_log_id)
FROM tbl_sabre_load_log
GROUP BY account_id
)
GROUP BY account_id
)
) Previous_Week

UNION ALL

SELECT account_id, sabre_log_id as ps,
outlet_count as po
From
(
SELECT account_id, outlet_count, sabre_log_id
FROM tbl_sabre_load_log
WHERE sabre_log_id in
(SELECT max(sabre_log_id)
FROM tbl_sabre_load_log
GROUP BY account_id
)
) Current_Week[/code]

Harsh Athalye
India.
"Nothing is Impossible"

pravin14u
Posting Yak Master

246 Posts

Posted - 2006-11-20 : 23:05:13

Thanks a lot for ur reply.

But the query would return the result sets one below the other.
We want these as

Previous_Week.account_id, Previous_Week.sabre_log_id as ps, Previous_Week.outlet_count as po, Current_Week.outlet_count as ci,
Current_Week.sabre_log_id as cs

in adjacent columns..

It would be great if you can suggest a way to do this.

harsh_athalye
Master Smack Fu Yak Hacker

5581 Posts

Posted - 2006-11-21 : 01:08:35

How difficult is that? Instead of UNION try join:

SELECT Previous_Week.account_id, Previous_Week.sabre_log_id as ps, Previous_Week.outlet_count as po,
	Current_Week.outlet_count as ci, Current_Week.sabre_log_id as cs
FROM
	(
	SELECT account_id, outlet_count, sabre_log_id
	FROM tbl_sabre_load_log
	WHERE sabre_log_id in
		(
		SELECT max(sabre_log_id) as "sec_log" FROM 
		tbl_sabre_load_log 
		WHERE sabre_log_id NOT IN
			(SELECT max(sabre_log_id)
			FROM tbl_sabre_load_log
			GROUP BY account_id
			)
		GROUP BY account_id
		)
	) Previous_Week

Join
	(
	SELECT account_id, outlet_count, sabre_log_id
	FROM tbl_sabre_load_log
	WHERE sabre_log_id in
		(SELECT max(sabre_log_id)
		FROM tbl_sabre_load_log
		GROUP BY account_id
		)
	) Current_Week
on Previous_Week.account_id = Current_Week.account_id

Harsh Athalye
India.
"Nothing is Impossible"

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