I've noticed a query that runs fine in my code but it's missing a where clause.
Why is it even working, is it a bug or a special scenario where a rule's interpretation gets tricky?
SELECT
C.Id
, C.Name
, C.Qualifying
, CI.PlaceG
, CI.PlaceN
, CI.Hcp
, CI.NewHcp
FROM dbo.Competitions AS C
INNER JOIN dbo.CompInscription AS CI ON (
CI.idcomp = C.id
)
AND C.archived = 1
AND CI.idmembre = 11227
AND CI.placeg IS NOT NULL
AND CI.placen IS NOT NULL
AND CI.Status IN (0, 8)
As NB has pointed out, what is happening here is that your conditionals are being applied to the JOIN rather than in a WHERE clause.
This is perfectly valid SQL but it's not seen much and is probably why it looks odd. If you replace the first AND with a WHERE you should get the same result.
Related
I have this merge query in oracle and it was working fine. Now we are migrating to postgres 10 and trying to find equivalent for this in postgres.
MERGE INTO s.act_pack C USING((SELECT A.jid, A.pid, B.pcode,
B.mc, A.md, A.hd FROM s.act_pack A INNER JOIN s.act_pack B
ON A.pid = B.pid AND A.pcode = B.mc AND (A.hd <> B.hd
OR A.md<> B.md)) order by A.upd_ts desc) D ON(C.pid = D.pid AND
C.pcode = D.pcode AND C.jid = D.jid) WHEN MATCHED THEN UPDATE SET C.md =
D.md, C.hd= D.hd;
I see some forums on web says postgres doesnt support merge, and use INSERT ... ON CONFLICT
but with no background in postgres, I am not able to understand how this complex query can be written using that.
And some says postgres9.5 and above support merge statement. since we are using postgres 10 tried to use same oracle query in postgres but recieved ERROR: syntax error at or near "MERGE"
Any help is highly appreciated.
You don't need an "UPSERT" as you are not doing an INSERT, so a regular UPDATE is enough:
update act_pack C
SET C.md = D.md,
C.hd = D.h
from (
SELECT A.jid, A.pid, B.pcode, B.mc, A.md, A.hd
FROM s.act_pack A
INNER JOIN s.act_pack B
ON A.pid = B.pid
AND A.pcode = B.mc
AND (A.hd <> B.hd OR A.md<> B.md)
) d
where C.pid = D.pid
AND C.pcode = D.pcode
AND C.jid = D.jid
This is a direct "translation" of your code. But the fact that the same table is used three times is a bit strange. But without more information it's hard to know where exactly this could be made more efficient.
I have a JPA statement which is like this
select p from Proposal p where p.creationTime > :startDate AND p.creationTime < :stopDate AND ((p.owner = :owner) OR (:member MEMBER OF p.sharedWithTeam.members)) ORDER BY p.creationTime DESC
But it never generates any result. I use EclipseLink.
After digging a bit into the generated SQL, I found out that it translates the query into something that can never be true!
SELECT XXX FROM userteam_users t3, USERTEAM t2, USERS t1, PROPOSAL t0 WHERE ((((t0.CREATIONTIME > ?) AND (t0.CREATIONTIME < ?)) AND ((t0.OWNER_username = ?) OR (? = t1.username))) AND ((t2.ID = t0.SHAREDWITHTEAM_ID) AND ((t3.teams_ID = t2.ID) AND (t1.username = t3.members_username)))) ORDER BY t0.CREATIONTIME DESC LIMIT ? OFFSET ?
(I only included the from and where clause to make it shorter...)
I can't see what is wrong with my JPQL query. Could it be my use of "OR"? or my "bold" use of the member of condition?
EDIT: in fact, the statement can be true, I misread it. BUT I have proposals with NO shared user team, so the first condition is always false in this case, and it should be true (in my view)
Thanks!
I have just switched from mysql to postgresql and my working dql queries stopped working.
Here is my dql
SELECT p
FROM AppBundle:Photo p
JOIN AppBundle:Like l WITH p = l.photo
WHERE p.isModerated = :isModerated
AND p.isActive = :isActive
AND p.category IN(:categories)
AND p.creationDate <= :begin
AND p.creationDate >= :end
GROUP BY p.id
ORDER BY l.creationDate DESC
Getting the next error
SQLSTATE[42803]: Grouping error: 7 ERROR: column "l1_.creation_date" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: ... p0_.creation_date >= $4 GROUP BY p0_.id ORDER BY l1_.creati...
As i can understand, it says that group by column should be in SELECT. I dont it to be there. I need to select just p (AppBundle:Photo) and nothing more. What should be edited in dql to get it working properly?
Thank you.
I just replaced ORDER BY l.creationDate DESC to ORDER BY p.creationDate DESC
It will work for me. As i understood, ORDER BY column should be SELECTed
In my database, for stores that have no rating from Reseller Ratings, they still have an entry but have -1.0 instead of a number between 0.0 and 10.0. The following query results in -10.00 showing up in my view for those stores with -1.0. Instead, I would like either nothing or a - showing up in its place, but I'm not very comfortable with implementing embedded if-statements in my view. Here is my current view.
CREATE VIEW myview AS
SELECT co_url_name AS company_url, score_combined AS stella_score, trunc(score*10, 2) AS bizrate_score,
(SELECT trunc("lifetimeRating"*10, 2)) AS resellerRating_score
FROM ss_profile_co AS s LEFT OUTER JOIN "resellerRatings_ratings" AS r
ON s.id = r.company_id
LEFT OUTER JOIN (SELECT * FROM bizrate_bizrate_ratings WHERE score_name = 'Overall rating') AS b
ON s.id = b.fk_co_id
ORDER BY co_url_name ASC;
The line (SELECT trunc("lifetimeRating"*10, 2)) AS resellerRating_score is the one that returns the negative numbers (or, for valid entries, will return a score between 0.00 and 100.00).
Obviously, I could simply remove these entries from the database that result in this, but it's half a learning experience and half out of my hands to do so anyways.
I appreciate the help!
EDIT: Attempted an embedded if but not surprisingly got an error.
IF (SELECT trunc("lifetimeRating"*10, 2)) = -10.00 THEN NULL ELSE (SELECT trunc("lifetimeRating"*10, 2)) AS resellerRating_score
EDIT2: Figured it out. Line in question is as follows:
(SELECT trunc("lifetimeRating"*10, 2) WHERE trunc("lifetimeRating"*10, 2) > 0) AS resellerrating_score
/foreveralone
Could look like this:
CREATE VIEW myview AS
SELECT co_url_name AS company_url
,score_combined AS stella_score
,trunc(score * 10, 2) AS bizrate_score
,CASE WHEN "lifetimeRating" < 0
THEN NULL
ELSE trunc("lifetimeRating" * 10, 2)
END AS resellerRating_score
FROM ss_profile_co s
LEFT JOIN "resellerRatings_ratings" r ON r.company_id = s.id
LEFT JOIN bizrate_bizrate_ratings b ON b.score_name = 'Overall rating'
AND b.fk_co_id = s.id
ORDER BY co_url_name;
Major points
Concerning your core question: the sub-select without a FROM clause serves no purpose. I simplified that and use a CASE statement instead.
I also simplified your LEFT JOIN to bizrate_bizrate_ratings. No sub-select necessary either. I pulled the WHERE clause up into the JOIN condition. Simpler and faster.
I would advise not to use mixed case identifiers, so you never have to use double quotes. (This probably makes #Daniels comment invalid, because lifetimerating != "lifetimeRating"
I have a query, that does a LEFT JOIN on a subselect. This query is run in a high load environment and performs within the set requirements. The query (highly simplified) looks like:
SELECT
table_A.pKey
, table_A.uKey
, table_A.aaa
, table_B.bbb
, alias_C.ccc
, alias_C.ddd
FROM table_A
INNER JOIN table_B ON table_A.pKey = table_B.pKey
LEFT JOIN (
SELECT
table_X.pKey
, table_X.ccc
, table_Y.ddd
FROM table_X
INNER JOIN table_Y ON table_X.pKey = table_Y.pKey
) AS alias_C ON table_A.uKey = alias_C.pKey;
(for various reasons, it is not possible to rewrite the subselect as a (direct) LEFT JOIN).
Now, I cannot get the LEFT JOIN on subselect to work with Zend_Db_Select. I've tried everything I could come up with, but it does not work.
So my question is:
Is it not possible to do a query as described above with Zend_Db_Select?
What syntax do I need to get it to work within Zend Framework?
I think that it should work like this:
$subselect = $db->select->from(array('x' => 'table_X'), array('x.pKey', 'x.ccc', 'y.ddd'), 'dbname')
->join(array('Y' => 'table_Y'), 'x.pkey = y.pkey', array(), 'dbname');
$select = $db->select->from(array('a' => 'table_A'), array(/*needed columns*/), 'dbname')
->join(array('b' => 'table_B'), 'a.pkey = b.pkey', array(), 'dbname')
->joinLeft(array('c' => new Zend_Db_Expr('('.$subselect.')'), 'c.pkey = a.ukey', array())
I haven't tried it but I believe it'll work.
...
->joinLeft(array('c' => new Zend_Db_Expr('(' . $subselect->assemble() . ')'), 'c.pkey = a.ukey', array())