I wonder is the following query valid in sql:
DELETE FROM Reporters
JOIN Cases ON Reporters.CaseId = Cases.ID
WHERE Cases.Court = #Court
I get an error:
Incorrect syntax near join
mention from which table that you wanted to delete from. (the solution is specific to SQL Server)
DELETE re --if you wanted to delete the cases replace `re` with `ca`
FROM Reporters re
JOIN Cases ca ON re.CaseId = ca.ID
WHERE ca.Court = #Court
DELETE r
FROM reporters as r
INNER JOIN cases as c
ON r.CaseId = c.ID
WHERE c.Court = #Court
Yes you can, you just have to specify Alias to your table and delete using it:
DELETE R
-- SELECT *
FROM Reporters AS R
INNER JOIN Cases AS C
ON R.CaseId = C.ID
WHERE C.Court = #Court ;
It will work if you alias the tables like;
DELETE r
FROM Reporters AS r
INNER JOIN Cases AS c
ON r.CaseId = c.ID
WHERE c.Court = #Court
Or you could use
DELETE FROM Reporters
WHERE EXISTS (SELECT 1 FROM Cases WHERE Cases.ID = Reporters.CaseId AND Cases.Court = #Court)
Related
I can simply use a select statment on a join to pull results I'd Like using:
Select * from RESULTS (NOLOCK) left join orders on Results.ordno = orders.ordno
left join folders on folders.folderno = orders.folderno
left join pranaparms on folders.prodcode = pranaparms.prodcode and results.analyte = pranaparms.analyte
WHERE Results.s <> 'OOS-A' and Results.Final Between pranaparms.LOWERQCLIMIT and pranaparms.UPPERQCLIMIT and (pranaparms.LOWERQCLIMIT IS NOT NULL and pranaparms.UPPERQCLIMIT IS NOT NULL)
and results.ordno in (1277494)
However, is there a convenient way which I could do an update on the selected fields?
I have tried this so far:
Update RESULTS (NOLOCK) left join orders on Results.ordno = orders.ordno
left join folders on folders.folderno = orders.folderno
left join pranaparms on folders.prodcode = pranaparms.prodcode and results.analyte = pranaparms.analyte
set Results.S = 'OOS-B'
WHERE Results.s <> 'OOS-A' and Results.Final Between pranaparms.LOWERQCLIMIT and pranaparms.UPPERQCLIMIT and (pranaparms.LOWERQCLIMIT IS NOT NULL and pranaparms.UPPERQCLIMIT IS NOT NULL)
and results.ordno in (1277494)
However, it is passing an error indicating "Incorrect syntax near '('"
Is there a way for me to update off of this join or will I need to do tables individually?
Your select syntax suggests SQL Server. The correct update syntax in SQL Server is:
update r
set S = 'OOS-B'
from results r left join
orders o
on r.ordno = o.ordno left join
folders f
on f.folderno = o.folderno left join
pranaparms p
on f.prodcode = p.prodcode and r.analyte = p.analyte
where r.s <> 'OOS-A' and
r.Final Between p.LOWERQCLIMIT and p.UPPERQCLIMIT and
(p.LOWERQCLIMIT IS NOT NULL and p.UPPERQCLIMIT IS NOT NULL) and
r.ordno in (1277494);
Notes:
Table aliases make the query much easier to write and to read.
Do not use NOLOCK unless you know what you are doing. Given that you don't know the syntax rules for update for the database you are using, I will guess that you don't understand locks either.
Your WHERE conditions are turning the outer joins into inner joins. You should just specify the correct join type -- and probably move the conditions to the on clauses. I've left the logic as you wrote it.
I fix my problem by chance, but I really want to know why it works :),
Here's the thing:
I get the ORA-00933: SQL command not properly ended Error when I execute the following SQL statement:
INSERT INTO BASP_DX.QLR#GT(BDCDYH, QSZT)
SELECT NVL(e.BDCDYH, ' '),b.LIFECYCLE AS QSZT
FROM DJ_DY a
LEFT JOIN DJ_XGDJGL d
ON d.ZSLBH = a.SLBH
LEFT JOIN DJ_DJB e
ON e.SLBH = d.FSLBH
AND e.SLBH = '0123456789'
LEFT JOIN DJ_QLRGL f
ON f.SLBH = e.SLBH
AND f.QLRLX = 'Person1'
LEFT JOIN DJ_QLRGL b
ON b.SLBH = a.SLBH
AND (b.QLRLX = 'Person2' OR (b.QLRLX = 'Person3' AND b.QLRID = f.QLRID))
WHERE a.SLBH = '12345'
AND e.SLBH IS NOT NULL
-- add the condition to ensure that
-- this statement and the second statement get the same result
AND b.QLRID IS NOT NULL
AND (a.LIFECYCLE = '0' OR a.LIFECYCLE IS NULL);
I remove all the unnecessary insert value, related table and condition from the original SQL statement, to focus on the problem part.
Then I google it, from this post I know the causes may be:
An INSERT statement with an ORDER BY clause or an INNER JOIN
A DELETE statement with an INNER JOIN or ORDER BY clause
An UPDATE statement with an INNER JOIN
Apparently, these are not my type. I didn't use the INNER JOIN and ORDER BY, all I use is LEFT JOIN statement, so I wonder it might be reason that I set too many conditions with the LEFT JOIN statement (such as LEFT JOIN DJ_QLRGL b), so I try move the conditions after WHERE clause, it looks like this:
INSERT INTO BASP_DX.QLR#GT(BDCDYH, QSZT)
SELECT NVL(e.BDCDYH, ' '),b.LIFECYCLE AS QSZT
FROM DJ_DY a
LEFT JOIN DJ_XGDJGL d
ON d.ZSLBH = a.SLBH
LEFT JOIN DJ_DJB e
ON e.SLBH = d.FSLBH
AND e.SLBH = '0123456789'
LEFT JOIN DJ_QLRGL f
ON f.SLBH = e.SLBH
AND f.QLRLX = 'Person1'
LEFT JOIN DJ_QLRGL b
ON b.SLBH = a.SLBH
-- this conditions move to WHERE clause
WHERE a.SLBH = '12345'
AND e.SLBH IS NOT NULL
-- here is the original LEFT JOIN condition
AND (b.QLRLX = 'Person2' OR (b.QLRLX = 'Person3' AND b.QLRID = f.QLRID))
AND (a.LIFECYCLE = '0' OR a.LIFECYCLE IS NULL);
Then it works!
But why?
I just want to know the reason for this situation.
Solution
the problem is triangular join, the LEFT JOIN conditions can't contain the condition concerning both the self join table, in this case, it's b.QLRID = f.QLRID, so when I remove the b.QLRID = f.QLRID condition, it works.
Firstly, the join of "DJ_QLRGL b" is not LEFT any more,
as WHERE condition excludes rows with no b counterpart found
I need to place the PeopleID in several tables for my new database to link all of the peole information. I have tried several times to write a simple update statement please help. Every time I get close I get AMBIGUOUS COLUMN ERROR I don't know what else to do.
Update CONTRACT
Set PeopleID = B.PeopleID
from People A
Inner join
(
Select PeopleId, F.ContractID
From People A
Inner Join Person PRSN on PRSN.PersonID = A.PersonID
Inner Join DARPA_IMPORT_REAL..persnl oldP on oldP.pl_pid = PRSN.PersonID
Left outer join Contract F on F.ContractID = oldP.kn_254id
) B on A.PeopleID = B.PeopleID
Go
try this
Update CONTRACT Set CONTRACT.PeopleID = B.PeopleID
from People A
Inner join (
Select A.PeopleId, F.ContractID
From People AA
Inner Join Person PRSN on PRSN.PersonID = AA.PersonID
Inner Join DARPA_IMPORT_REAL..persnl oldP on oldP.pl_pid = PRSN.PersonID
Left outer join Contract F on F.ContractID = oldP.kn_254id ) B
on A.PeopleID = B.PeopleID
you were asigning the ´A´ alias twice so I recomend using different aliases always
i have the following SQL DML Update command, but the syntax isn´t correct and the command doesn´t work:
UPDATE hmsg_vehicle_category
SET hmsg_vehicle_category.hmsg_id, hmsg_vehicle_category.vehiclecategories_inputname
SELECT l_p.hmsg_id, tmp_p_vc.inputname
FROM hmsg_him_product AS l_p INNER JOIN ( SELECT p.id, vc.inputname
FROM him_product p INNER JOIN vehicle_category vc
ON p.id = vc.product
ORDER BY p.id, vc.inputname DESC ) AS tmp_p_vc
ON l_p.products_id = tmp_p_vc.id
WHERE l_p.hmsg_id = 171;
How can i execute this SQL command? Where is the mistake in the snytax?
Thanks for help !
Greetz
Marwief
Something like:
update hmsg_vehicle_category set
hmsg_id = l_p.hmsg_id,
vehiclecategories_inputname = tmp_p_vc.inputname
from hmsg_him_product as l_p
inner join him_product as p on p.id = l_p.products_id
inner join vehicle_category as vc on vc.product = p.id
where l_p.hmsg_id = 171
Be warned, this one will update all records in hmsg_vehicle_category table. May be you want to add this into where clause:
update hmsg_vehicle_category as hvc set
vehiclecategories_inputname = tmp_p_vc.inputname
from hmsg_him_product as l_p
inner join him_product as p on p.id = l_p.products_id
inner join vehicle_category as vc on vc.product = p.id
where
l_p.hmsg_id = 171 and hvc.hmsg_id = 171
But I cannot advice something more specific at the moment, because it's unclear from your question.
DELETE B.*
FROM m_productprice B
INNER JOIN m_product C ON B.m_product_id = C.m_product_id
WHERE C.upc = '7094' AND B.m_pricelist_version_id = '1000020'
i am getting the following error PostgreSQL 8.2.11
ERROR: syntax error at or near "B"
LINE 1: DELETE B.* from m_productprice B INNER JOIN m_product C ON ...
i tried giving
DELETE B from m_productprice B INNER JOIN m_product C ON B....
ERROR: syntax error at or near "B"
i tried giving
ERROR: syntax error at or near "INNER"
LINE 1: DELETE from m_productprice B INNER JOIN m_product C ON B.m_...
what is the problem with my query?
DELETE
FROM m_productprice B
USING m_product C
WHERE B.m_product_id = C.m_product_id AND
C.upc = '7094' AND
B.m_pricelist_version_id='1000020';
or
DELETE
FROM m_productprice
WHERE m_pricelist_version_id='1000020' AND
m_product_id IN (SELECT m_product_id
FROM m_product
WHERE upc = '7094');
This worked for me:
DELETE from m_productprice
WHERE m_pricelist_version_id='1000020'
AND m_product_id IN (SELECT m_product_id
FROM m_product
WHERE upc = '7094');
If you have more than one join you could use comma separated USING statements:
DELETE
FROM
AAA AS a
USING
BBB AS b,
CCC AS c
WHERE
a.id = b.id
AND a.id = c.id
AND a.uid = 12345
AND c.gid = 's434sd4'
Reference
Another form that works with Postgres 9.1+ is combining a Common Table Expression with the USING statement for the join.
WITH prod AS (select m_product_id, upc from m_product where upc='7094')
DELETE FROM m_productprice B
USING prod C
WHERE B.m_product_id = C.m_product_id
AND B.m_pricelist_version_id = '1000020';
Just use a subquery with INNER JOIN, LEFT JOIN or smth else:
DELETE FROM m_productprice
WHERE m_product_id IN
(
SELECT B.m_product_id
FROM m_productprice B
INNER JOIN m_product C
ON B.m_product_id = C.m_product_id
WHERE C.upc = '7094'
AND B.m_pricelist_version_id = '1000020'
)
to optimize the query,
use NOT EXISTS instead of IN
and WITH for large subqueries
Essentially everything mentioned here is mentioned in the docs, but no-one is specifying exactly what. So this is what the current (v15) DELETE docs says:
Notes
PostgreSQL lets you reference columns of other tables in the WHERE condition by specifying the other tables in the USING clause. For example, to delete all films produced by a given producer, one can do:
DELETE FROM films USING producers
WHERE producer_id = producers.id AND producers.name = 'foo';
What is essentially happening here is a join between films and producers, with all successfully joined films rows being marked for deletion. This syntax is not standard. A more standard way to do it is:
DELETE FROM films
WHERE producer_id IN (SELECT id FROM producers WHERE name = 'foo');
In some cases the join style is easier to write or faster to execute than the sub-select style.