I have multiple tables in a join and every table has a column ID. So in the resultig join there are a lot of ID columns. How I can access a specific ID column with the criteria API?
ParameterExpression<A> idParam = criteriaBuilder.parameter(A.class, PARAM_NAME);
Subquery<B> sq = query.subquery(B.class);
Root<B> root = sq.from(B.class);
Join<C, D> joinTogether = root.join("memberX").join("memberY");
sq.select(root);
sq.where(criteriaBuilder.and(criteriaBuilder.equal(joinTogether.get("id"), idParam), criteriaBuilder.equal(parentQuery.get("id"), root.get("id"))));
The problem is, that in the resulting SQL contains
SELECT 1 FROM E t6, B t5, C t4, D t3 WHERE ((( = paramName) AND (t0.ID = t5.ID)) AND (((t6.memberZ = t5.ID) AND (t4.ID = t6.memberX)) AND (t3.ID = t4.memberY))))
The table E (t6) is an additional join table between table B and C, t0 is the reference to the parent query. Instead t3.id = :paramName EclipseLink creates nothing just before the first equal-sign (paramName is the content of the constant PARAM_NAME). My idea is, that the "id" column could reference all tables and EclipseLink can not decide, which table I mean.
How I can change that?
Thank you
André
Related
I've downloaded the geonames data dump
The main table has admin3 and admin4 columns but there is no data dump which corresponds to the data in these columns.
Does any one know how to map the admin3 and admin4 codes with their respective place names?
Documentation on the primary website does not seem to explain this but here you go:
select t4.name as town,
t3.name as county,
t2.name as district,
t1.name as admin1,
t0.name,
t0.feature_class,
t0.feature_code,
t0.country_code,
t0.admin1,
t0.admin2,
t0.admin3,
t0.admin4,
t0.population
from geoname t0
left join geoname t1 on t1.admin1 = t0.admin1 and t1.feature_code = 'ADM1'
left join geoname t2 on t2.admin2 = t0.admin2 and t2.feature_code = 'ADM2'
left join geoname t3 on t3.admin3 = t0.admin3 and t3.feature_code = 'ADM3'
left join geoname t4 on t4.admin4 = t0.admin4 and t4.feature_code = 'ADM4'
where t0.name = 'London'
I am working on sql server I have two tables and I need to return records from the left table which are not found in the right table for that I am using left join like below query,
select #MID=MID,#MName=Name,#PID=PID,#PName=PName,#DID=DID from #CompanyDataInfo where id=#MCount
insert into #temp SELECT Top(1) f.Name,f.PID,f.PName,v.* FROM #CompanyDataInfo f
left join Employee v on v.Id=f.ID and v.DID=f.DID
where v.Id =#MID and v.DId = #DId and v.PId = #PId and v.CId =#CId and DATE_TIME between DATEADD(minute,-555,GETDATE()) and GETDATE() order by DATE_TIME desc
Result should be all rows from #CompanyDataInfo table while no record found in Employee table for related ID, I googled and use "v.Id is null" but not getting expected result
Is there any solution greatly appriciable
Thanks In advance
Your query is not using left join in correct way. You are using your right table reference in where clause. I try to correct it below but I don't have full information about your table schema. Please try this-
select
#MID = MID,
#MName = Name,
#PID = PID,
#PName = PName,
#DID = DID
from #CompanyDataInfo
where id = #MCount
insert into #temp
select
f.Name,
f.PID,
f.PName,
v.*
from #CompanyDataInfo f
left join Employee v on v.Id=f.ID and v.DID=f.DID
where f.Id = #MID and
f.DId = #DId and
f.PId = #PId and
f.CId = #CId and
f.DATE_TIME between DATEADD(minute,-555,GETDATE()) and GETDATE() and
v.Id is null
order by f.DATE_TIME desc
Add ...and v.Id is null to your where clause.
I have two tables table1 and table2. Each table contains a column with itemPrice. I need to add the two columns together.
The SQL query below returns the correct SUM.
SELECT SUM(item1+ item2) FROM
(select SUM(t1.itemPrice) item1 from table1 t1 WHERE t1.userid=='jonh') tableA
CROSS JOIN
(select SUM(t2.itemPrice) item2 from table2 t2 WHERE t1.userid=='jonh') tableB
I am not been lazy but the above query has so many SUM functions that I don't know where to start to write LINQ queries.
Can anyone help?
Ceci,
Hopefully this will give you what you want...
from f in (
from x in ( from t1 in Table1
where t1.Userid.Equals("John")
select new { Userid = t1.Userid }
).Distinct()
select new { item1 = ( from z in Table1
where z.Userid.Equals("John")
select z.ItemPrice ).Sum() ??0 ,
item2 = ( from z in Table2
where z.Userid.Equals("John")
select z.ItemPrice ).Sum() ??0 }
) select new { total = f.item1 + f.item2 }
In the case where there are no records for "john" in one table, it will bring back a 0 and sum up the other tables.
hope this helps.
I'm having a bit of brain fade today and can't figure out how I should express this SQL query correctly using ActiveRecord/Squeel/ARel:
SELECT `d1`.* FROM `domain_names` d1
WHERE `d1`.`created_at` = (
SELECT MAX(`d2`.`created_at`)
FROM `domain_names` d2
WHERE `d2`.`owner_type` = `d1`.`owner_type`
AND `d2`.`owner_id` = `d1`.`owner_id`
AND `d2`.`key` = `d1`.`key`
)
Any ideas?
Background: The DomainName model has a polymorphic owner as well as a "key" field that allows owners to have many different types of domain name. The query above fetches the latest domain name for each unique [owner_type, owner_id, key] tuple.
Edit:
Here's the same query using JOIN:
SELECT `d1`.* FROM `domain_names` d1
JOIN (
SELECT `owner_type`, `owner_id`, `key`, MAX(`created_at`) max_created_at
FROM `domain_names`
GROUP BY `owner_type`, `owner_id`, `key`
) d2
ON `d2`.`owner_type` = `d1`.`owner_type`
AND `d2`.`owner_id` = `d1`.`owner_id`
AND `d2`.`key` = `d1`.`key`
WHERE `d1`.`created_at` = `d2`.`max_created_at`
I have a question about index a many to many relation.
e.g:
table A : id,value_a(string)
table B : id,value_b(string)
table C: id_a,id.b,value_c(string)
the query is :
select * from C where C.id_a = A.id And A.value_a like keyword_a
and C.id_b = B.id andB.value_b like keyword_b
so i want to index table A and table B with full-text search by sphinx,but I can not find
a method to join two
search result to table C .
can anyone help me ? thanks a lot!
You need to make an index with all the data
sql_query = select C.id,id_a,id_b,value_a,value_b,value_c \
from C \
inner join A on (C.id_a = A.id) \
inner join B on (C.id_b = B.id)
sql_attr_uint = id_a
sql_attr_uint = id_b
by storing id_a and id_b in the index as attributes, can group by (at search time) to only get one document per A or B.
btw, a query would be something like
$cl->setMatchMode(SPH_MATCH_EXTENDED);
$res = $cl->Query('#value_a keyword_a #value_b keyword_b',$sphinx_index);