I'm trying to find all entries in table a, where there is no matching entry in table b for one specific column (order). I'm using the following:
SELECT *
FROM a
LEFT OUTER JOIN b
ON a.id = b.id
WHERE b.order IS NULL
AND a.result>10
However, the last condition for result doesn't seems to work. It simply lists all the entries from table a, regardless whether result is more than 10 or not.
Any way around this?
Shouldn't your query be as below?
SELECT * FROM a LEFT OUTER JOIN b ON a.id = b.id WHERE b.id IS NULL AND a.result>10
Related
I am trying to join three tables using a sub query.
The result of the first left outer join is to be used with another table to get a composite view with all attributes.
I am getting an error where the compile says, Unknown Command for the table in the second join clause.
When I create two independent views and then join then it works fine.
(select
l.ENROLLED_CONTENT,
l.LEARNING_ENROLLMENT_LEARNER,
l.EMPLOYEE_ID,
l.JOB_FAMILY_GROUP,
l.EMPLOYEE_TYPE,
l.JOB_FAMILY,
l.LEARNING_ENROLLMENT,
l.COMPLETION_STATUS,
l.COMPLETION_DATE,
l.EXPIRATION_DATE,
l.CF_LRV_LEARNING_CONTENT_NUMBER,
l.LEARNING_CONTENT_DETAIL,
l.LEARNING_CONTENT_TYPE,
l.LESSON_TYPE,
e.id# "WK_WORKER_ID"
from tgt_workday.learning l
left outer join ods_hrmaster.employee e
on l.EMPLOYEE_ID = e.employee#) t1
left outer join ( select
per_ids_id,
per_id,
id_pureid from
ods_pure.person_ids
) t2 on t1.wk_worker_id = t2.value where t2.type = 'Employee ID';
You can write it in a simple way. There is no need to make sub-queries as:
SELECT L.ENROLLED_CONTENT,
L.LEARNING_ENROLLMENT_LEARNER,
L.EMPLOYEE_ID,
L.JOB_FAMILY_GROUP,
L.EMPLOYEE_TYPE,
L.JOB_FAMILY,
L.LEARNING_ENROLLMENT,
L.COMPLETION_STATUS,
L.COMPLETION_DATE,
L.EXPIRATION_DATE,
L.CF_LRV_LEARNING_CONTENT_NUMBER,
L.LEARNING_CONTENT_DETAIL,
L.LEARNING_CONTENT_TYPE,
L.LESSON_TYPE,
E.ID# "WK_WORKER_ID"
FROM TGT_WORKDAY.LEARNING L
LEFT OUTER JOIN ODS_HRMASTER.EMPLOYEE E
ON L.EMPLOYEE_ID = E.EMPLOYEE#
LEFT OUTER JOIN ODS_PURE.PERSON_IDS T2
ON E.ID# = T2.VALUE
AND T2.TYPE = 'Employee ID';
Once you use the outer joined table's column in WHERE clause, It will result in the same result as inner join(there is another ways to use it in WHERE clause though). So it is better to avoid using outer joined table's column in the WHERE clause.
Try as
SELECT *
FROM ( (SELECT l.ENROLLED_CONTENT,
l.LEARNING_ENROLLMENT_LEARNER,
l.EMPLOYEE_ID,
l.JOB_FAMILY_GROUP,
l.EMPLOYEE_TYPE,
l.JOB_FAMILY,
l.LEARNING_ENROLLMENT,
l.COMPLETION_STATUS,
l.COMPLETION_DATE,
l.EXPIRATION_DATE,
l.CF_LRV_LEARNING_CONTENT_NUMBER,
l.LEARNING_CONTENT_DETAIL,
l.LEARNING_CONTENT_TYPE,
l.LESSON_TYPE,
e.id# "WK_WORKER_ID"
FROM tgt_workday.learning l
LEFT OUTER JOIN ods_hrmaster.employee e
ON l.EMPLOYEE_ID = e.employee) t1
LEFT OUTER JOIN
(SELECT per_ids_id, per_id, id_pureid FROM ods_pure.person_ids) t2
ON t1.wk_worker_id = t2.VAL AND t2.TYPE = 'Employee ID')
I have three tables
CLAIMS_TB
CLAIMS_RISK_TB
VEHICLE_TB
And then I need this result below:
Who can help me or share with me the query to be used?
N.B: If the code is 700 it means that it is a vehicle and it must fill the column called "ai_vehicle_use" otherwise it must leave it blank because "VEHICLE_TB" table contains only vehicles
This is what I tried:
select
klm.CM_PL_INDEX,
klm.cm_no,
klmrisk.cr_risk_code,
CASE WHEN klm.CM_PR_CODE = '0700' THEN klmrisk.cr_risk_code ELSE '' END,
veh.ai_vehicle_use
from CLAIMS_TB klm
JOIN CLAIMS_RISK_TB klmrisk
ON (klm.cm_index = klmrisk.cr_cm_index)
INNER JOIN VEHICLE_TB veh
on veh.ai_regn_no = klm.cm_no
where klm.cm_no='CL/01/044/00001/01/2018'
or klmrisk.cr_cm_index='86594'
order by klmrisk.cr_risk_code;
I believe this could fit your needs.
SELECT
*
FROM CLAIMS_TB AS c
LEFT JOIN CLAIMS_RISK_TB cl ON c.cm_index = cl.cr_cm_index
LEFT JOIN VEHICLE_TB v ON cl.cr_risk_code = v.ai_risk_index
Finaly I find the solution, query below works:
select * from CLAIMS_TB c
JOIN CLAIMS_RISK_TB cr ON( C.CM_INDEX = cr.cr_cm_index)
LEFT OUTER JOIN VEHICLE_TB v ON (cr.cr_risk_code = v.ai_regn_no);
I have two tables A and B that both have a column id. I wish to obtain ids from A that are not present in B. The obvious way is:
SELECT id FROM A WHERE id NOT IN (SELECT id FROM B)
Unfortunately, Hive doesn't support in, exists or subqueries. Is there a way to achieve the above using joins?
I thought of the following
SELECT A.id FROM A,B WHERE A.id<>B.id
But it seems like this will return the entirety of A, since there always exists an id in B that is not equal to any id in A.
You can do the same with a LEFT OUTER JOIN in Hive:
SELECT A.id
FROM A
LEFT OUTER JOIN B
ON (B.id = A.id)
WHERE B.id IS null
Hive seems to support IN, NOT IN, EXIST and NOT EXISTS from 0.13.
select count(*)
from flight a
where not exists(select b.tailnum from plane b where b.tailnum = a.tailnum);
The subqueries in EXIST and NOT EXISTS should have correlated predicates (like b.tailnum = a.tailnum in above sample)
For more, refer Hive Wiki > Subqueries in the WHERE Clause
Should you ever want to do an IN as so:
SELECT id FROM A WHERE id IN (SELECT id FROM B)
Hive has this covered with a LEFT SEMI JOIN:
SELECT a.key, a.val
FROM a LEFT SEMI JOIN b on (a.key = b.key)
if you can using spark sql you can use left anti join.
ex: SELECT A.id FROM A left anti join B on a.id=b.id
I have the following table structure:
I want to select:
all TableA entries + the Identifier column from Table C that have:
a special value in TableBType ("TableBTypeValue")
a special value in TableCType ("TableCTypeValue")
The problem that I have is that the linq queries seem to fail when there are TableA entries that have no TableB entry or if there are TableB entries without a TableC (TableBType and TableCType is mandatory so they don't have that problem).
With SQL this would not be a big problem, but as I am new to linq I could not find the correct way to create this query.
I think this is what you are looking for:
from c in db.TableC
where c.TableCType == TableCTypeValue
join b in db.TableB on c.TableBId equals b.Id
where b.TableBType == TableBTypeValue
join a in db.TableA on b.TableAId equals a.Id
select new { a, c.Identifier };
Hope it helps.
Dim ds = From a In db.Model
Join b In db.1 On a.id Equals b.ID
Join c In db.2 On a.id Equals c.ID
Join d In db.3 On a.id Equals d.ID
Join f In db.4 On a.id Equals f.ID
Select a.id, a.Ref, a.Type, a.etc
Above is my linq query. At the moment I am only getting the first row from the db returned when there are currently 60 rows. Please can you tell me where I am going wrong and how to select all records.
Thanks in advance!
UPDATE:
When I take out all the joins like so:
Dim ds = From a In db.1, b In db.2, c In db.3, d In db.4, f In db.5
Select a.id, a.Ref, a.type, b.etc, c.etc, d.etc
I get a system.outofmemory exception!
You're only going to get a row produced when all of the joins match - in other words, when there's a row from Model with an AP, an Option, a Talk and an Invoice. My guess is that there's only one of those.
LINQ does an inner join by default. If you're looking for a left outer join (i.e. where a particular row may not have an Invoice, or a Talk etc) then you need to use a group join, usually in conjunction with DefaultIfEmpty.
I'm not particularly hot on VB syntax, but this article looks like it's what you're after.