I keep getting this error trying to run this simple Join.....
SELECT docregitem.reviewdate, docregitem.nclient, client.name
FROM docregitem, client
INNER JOIN client
ON docregitem.nclient = client.nclient
ORA-00904: "DOCREGITEM"."NCLIENT": invalid identifier
I can do a select and all the columns are present and correct...
I think the query you want is:
SELECT dr.reviewdate, dr.nclient, c.name
FROM docregitem dr INNER JOIN
client c
ON dr.nclient = c.nclient;
Your from clause has a comma in it. This is a lot like a cross join, but it affects the columns. These are not known in the on clause, which is what is causing the problem.
SELECT docregitem.reviewdate, docregitem.nclient, client.name
FROM docregitem
INNER JOIN client
ON docregitem.nclient = client.nclient
you try this one as you used client table twice one with simple join and other with inner join without giving the alias name to the table so the compiler is confused in selecting and comparing column from client table.
Related
I had a working sample query earlier in my code as mentioned below.
SELECT DISTINCT
nombre_aplicacion,
APLICACION,
NOMBRE_APLCODE,
DESCRIPCION,
AREAFUNC
FROM (
select **CODAPLICATION nombre_aplicacion**,
APLICACION,
NOMBRE_APLCODE,
DESCRPTION,
AREAFUNC
from admin.VW_APLICACIONES#dblink,
admin.VW_PRODUCTOS#dblink
where **nombre_aplicacion (+) = CODAPLICATION**
)
WHERE 1=1
ORDER BY nombre_aplicacion ASC;
When I try similar type of query with different tables I was getting error as invalid ORA-00904: "NOMBRE_APLICACION": invalid identifier.
If I remove nombre_aplicacion (+) = CODAPLICATION in where condition query is fetching the result. Can any one suggest why I was facing error as its working earlier with sample query and I was getting error? Is this join is valid?
The query is not valid as:
In the inner sub-query you select areafunc and in the outer query you use area which does not appear in the inner sub-query so will not be available.
In the inner sub-query, you define CODAPLICATION to have the alias nombre_aplicacion and then you try to use that alias in the WHERE clause as a join condition; that will not work.
You have not described which column belongs to which table but you want something like:
SELECT DISTINCT
a.codaplication AS nombre_aplicacion,
a.aplicacion,
a.nombre_aplcode,
p.descrption,
p.areafunc
from APLICACIONES a
LEFT OUTER JOIN PRODUCTOS p
ON (a.primary_key_column = p.foreign_key_column)
ORDER BY nombre_aplicacion ASC;
Note: you are going to have to correct the code to give the correct table aliases for each column and give the correct columns for the join condition.
I have a very simple query that I am trying to execute:
select *
from submissions
inner join (
select *
from hackers
inner join challenges
on hackers.hacker_id = challenges.hacker_id
) dtable
on submissions.challenge_id = dtable.challenge_id
and submissions.hacker_id = dtable.hacker_id;
Oracle rejects it with:
ORA-00904: "DTABLE"."HACKER_ID": invalid identifier.
I have kept the alias dtable visible by keeping it outside the brackets. Why is Oracle rejecting my query?
SELECT * in your sub-query is a problem.
You have the same column name in both tables that are being joined. This means that you're trying to create an inline-view called dtable where at least two columns have the same name (in this case both tables have a hacker_id column and your use of * is essentially saying "use them both".). You can't do that.
You're going to need SELECT hackers.a, hackers.b, challenges.x, challenges.y, etc, etc in your sub-query. By being explicit in this way you can ensure that no two columns have the same name.
An alternative could be SELECT hackers.*, challenges.a AS c_a, challenges.b AS c_b, etc.
Either way you are being explicit about which fields to pick up, what their positions and names are, etc. The end result being that you can then avoid columns having the same name as other columns.
You do not need subqueries for this. Your query is not actually "simple". The simple form looks more like this:
select . . .
from submissions s join
hackers h
on s.hacker_id = h.hacker_id join
challenges c
on s.challenge_id = c.challenge_id;
Note that I removed the condition between challenge and hackers on hacker_id. That extra join condition doesn't really make sense to me (although it might make sense if you provided sample data).
As others have said: The sub-select selects two different columns hacker_id from two different tables. This confuses Oracle.
But there is no need for a sub-select
select * from
submissions
inner join challenges
on submissions.challenge_id = challenges.challenge_id
inner join hackers
on submissions.hacker_id = hackers.hacker_id;
I am trying to run a select statement from two tables, the data that I want to return takes on 3-4 joins to achieve. I am getting the error
ORA-00904: "ADDRESS_USAGES"."AUS_PRO_REFNO": invalid identifier
when both tables and columns exist. I have read the post relating to this error but given that I am just starting out I cant make head nor tail of them. Any suggestions (be gentle). SQL below TIA
select ins_srq_no, adr_line_all from inspections
join properties
on inspections.ins_pro_refno = properties.pro_propref
join addresses
on properties.pro_propref = address_usages.aus_pro_refno
join address_usages
on address_usages.aus_pro_refno = addresses.adr_refno
where fsc.address_usages.end_date is null;
This on clause is incorrect, because you haven't yet joined to the address_usages table: on properties.pro_propref = address_usages.aus_pro_refno. This is causing Oracle to throw the error you're seeing; it's not about the table or column not existing, it's the fact that within that query, that identifier is invalid because you haven't yet joined to the table.
At a guess (I can't be 100% sure without seeing your table structures and foreign keys), you need to join addresses back to properties. If so, the query should look something like this:
select ins_srq_no, adr_line_all
from inspections
inner join properties
on inspections.ins_pro_refno = properties.pro_propref
inner join addresses
on properties.pro_propref = addresses.[column name of FK to properties]
inner join address_usages
on address_usages.aus_pro_refno = addresses.adr_refno
where fsc.address_usages.end_date is null;
I am making a subquery but I am getting a strange error
The column 'RealEstateID' was specified multiple times for 'NotSold'.
here is my code
SELECT *
FROM
(SELECT *
FROM RealEstatesInfo AS REI
LEFT JOIN Purchases AS P
ON P.RealEstateID=REI.RealEstateID
WHERE DateBought IS NULL) AS NotSold
INNER JOIN OwnerEstate AS OE
ON OE.RealEstateID=NotSold.RealEstateID
It's on SQL server by the way.
That's because there will be 2 realestiteids in your subquery. You need to change it to explicitly list the columns from both table and only include 1 realestateid. It doesn't matter which as you use it for your join.
If you're very Lazy you can select rei.* and only name the p cols apart from realestateid.
Btw select * is probably never a good idea in sub queries or derived tables or ctes.
I am running following query in Oracle 10 XE and getting [Err] ORA-00904: "Q": invalid identifier
SELECT questions.sb_title Q,questions.sb_baab_id,questions.sb_fasal_id,QUESTIONS.SB_CONTENT answer,IST.SB_PREFERENCE PREF
FROM USER_QUESTIONS questions
INNER JOIN USER
ON QUESTIONS.SB_USER_ID = USER.SB_ID
INNER JOIN IST
ON IST.SB_ID = USER.SB_IST_ID
AND(Q LIKE '%where is%')
AND USER.SB_IST_ID =
(
Select issued.SB_IST_ID
FROM USER_REGISTER register_number
INNER JOIN USER_ISSUED issued
ON register_number.SB_REGISTER_NUMBER = ISSUED.SB_REGISTER_NUMBER
AND REGISTER_NUMBER.SB_REGISTER_NUMBER IN(1240)
)
You cannot reference an alias in the JOIN condition - write the actual column name: sb_title.
I don't think you can use the alias "Q" like that. You're aliasing it in your select clause, don't think you can use that alias in your ON clause. Try using the full column name (sb_title).