I have two tables in SQL Server, tbl_disputes and tbl_disputetypes. The tbl_disputes table contains a foreign key column disputetype. The table tbl_disputetypes contains the primary key field disputetypeid and disputetypedesc. The following query gives me a count of each disputetype from the tbl_disputes table.
select disputetype, count(disputetype) as numberof
from tbl_disputes
group by disputetype
What sort of join or subquery do I need to use to display the
tbl_disputetypes.dbo.disputetypedesc instead of tbl_disputes.dbo.disputetype?
EDIT Issue was because disputetypedesc was set as TEXT. I changed it to nvarchar, and the following query worked:
SELECT
tbl_disputetypes.disputetypedesc,
count(tbl_disputetypes.disputetypedesc)
FROM
tbl_disputes Left OUTER JOIN
tbl_disputetypes ON tbl_disputes.disputetype = tbl_disputetypes.disputetypeid
group by tbl_disputetypes.disputetypedesc
Unless I'm missing something, you can just LEFT JOIN the description:
select disputetypedesc, count(disputetype) as numberof
from tbl_disputes d
LEFT JOIN tbl_disputetypes dt
ON dt.disputetypeid = d.disputetype
group by disputetypedesc
Assuming 2005+:
WITH x(t, numberof) AS
(
SELECT disputetype, COUNT(*)
FROM tbl_disputes
GROUP BY disputetype
)
SELECT dt.disputetypedesc, x.numberof
FROM tbl_disputetypes AS dt
INNER JOIN x ON dt.disputetype = x.t;
A simple JOIN?
select
DT.disputetypedesc, count(*) as numberof
from
tbl_disputes D
JOIN
tbl_disputetypes DT ON D.disputetype = DT.disputetype
group by
DT.disputetypedesc
The basic idea is that you will need a sub-query. Something like this will work:
select disputetypedesc, disputetype, numberof
from (select disputetype, count(disputetype) numberof
from tbl_disputes
group by disputetype) t left outer join
tbl_disputetypes on t.disputetype = tbl_disputetypes.disputetype
I am not sure if I understand your question however you should be able to select all columns using a query similar to the code sample below.
The following query will join the two tables by the disputetypeid column. I changed the format of the SQL statement however you can obviously format it however you would like.
SELECT tbl_disputetypes.disputetypedesc
, tbl_disputes.*
, <any_column_from_either_table>
FROM tbl_disputes
INNER JOIN tbl_disputetypes
ON tbl_disputes.disputetypeid = tbl_disputetypes.disputetypeid
Related
I have a table here in which I want to write a SELECT query in SQL Server that allows me to get the following:
For each unique combination of SalesPerson x Country, get only the rows with the latest Upload_DateTime
However, I am trying to do a group-by and inner join, but to no avail. My code is something like this:
SELECT t1.[SalesPerson], t1.[Country], MAX(t1.[Upload_DateTime]) as [Upload_DateTime]
FROM [dbo].[CommentTable] AS t1
GROUP BY t1.[SalesPerson], t1.[Country]
INNER JOIN SELECT * FROM [dbo].[CommentTable] as t2 ON t1.[SalesPerson] = t2.[SalesPerson], t1.[Country] = t2.[Country]
It seems like the GROUP BY needs to be done outside of the INNER JOIN? How does that work? I get an error when I run the query and it seems my SQL is not right.
Basically, this subquery will fetch the person, the country and the latest date:
SELECT
SalesPerson, Country, MAX(uplodaed_datetime)
FROM CommentTable
GROUP BY SalesPerson, Country;
This can be used on a lot of ways (for example with JOIN or with an IN clause).
The main query will add the remaing columns to the result.
Since you tried a JOIN, here the JOIN option:
SELECT
c.id, c.SalesPerson, c.Country,
c.Comment, c.uplodaed_datetime
FROM
CommentTable AS c
INNER JOIN
(SELECT
SalesPerson, Country,
MAX(uplodaed_datetime) AS uplodaed_datetime
FROM CommentTable
GROUP BY SalesPerson, Country) AS sub
ON c.SalesPerson = sub.SalesPerson
AND c.Country = sub.Country
AND c.uplodaed_datetime = sub.uplodaed_datetime
ORDER BY c.id;
Try out: db<>fiddle
I have some tables that can be accessed here and I would like to get a new table with EntryId from Entry table and ProtocolNumber from JudicialOrder table. For that I'm using this query:
SELECT DISTINCT ET.EntryId, JOA.ProtocolNumber FROM Entry AS ET
LEFT JOIN JudicialOrderAccount AS JOT ON JOT.AccountId = ET.OwnerAccountId
INNER JOIN JudicialOrder AS JOA ON JOA.JudicialOrderId = JOT.JudicialOrderId;
But the ProtocolNumber is duplicated, what could be wrong with my query?
As Kurt said only the combination of ET.EntryId, JOA.ProtocolNumber is unique. You will recognize it if you add an order by.
SELECT DISTINCT ET.EntryId, JOA.ProtocolNumber FROM Entry AS ET
LEFT JOIN JudicialOrderAccount AS JOT ON JOT.AccountId = ET.OwnerAccountId
INNER JOIN JudicialOrder AS JOA ON JOA.JudicialOrderId = JOT.JudicialOrderId
ORDER BY ET.EntryId, JOA.ProtocolNumber;
If you would really like to have unique protocol number you would need to group by ProtocolNumber and wrap EntryId in some string_agg function (depends on your database).
FYI: Your LEFT JOIN - INNER JOIN combination ends up being two INNER JOINs, see
i have following sql in java project:
select distinct * from drivers inner join licenses on drivers.user_id=licenses.issuer_id
inner join users on drivers.user_id=users.id
where (licenses.state='ISSUED' or drivers.status='WAITING')
and users.is_deleted=false
And result i database looks like this:
And i would like to get only one result instead of two duplicated results.
How can i do that?
Solution 1 - That's Because one of data has duplicate value write distinct keyword with only column you want like this
Select distinct id, distinct creation_date, distinct modification_date from
YourTable
Solution 2 - apply distinct only on ID and once you get id you can get all data using in query
select * from yourtable where id in (select distinct id from drivers inner join
licenses
on drivers.user_id=licenses.issuer_id
inner join users on drivers.user_id=users.id
where (licenses.state='ISSUED' or drivers.status='WAITING')
and users.is_deleted=false )
Enum fields name on select, using COALESCE for fields which value is null.
usually you dont query distinct with * (all columns), because it means if one column has the same value but the rest isn't, it will be treated as a different rows. so you have to distinct only the column you want to, then get the data
I suspect that you want left joins like this:
select *
from users u left join
drivers d
on d.user_id = u.id and d.status = 'WAITING' left join
licenses l
on d.user_id = l.issuer_id and l.state = 'ISSUED'
where u.is_deleted = false and
(d.user_id is not null or l.issuer_id is not null);
I posted on Friday (sql multiple count) and had a few responses.
Having tried to implement them today, I keep getting the same error.
My SQL code now is:
SELECT MBDDX_STUDY.STUDY_NAME,
COUNT(MBDDX_EXPERIMENT.STUDY_ID)
AS NUMBER_OF_EXPERIMENTS
FROM MBDDX_STUDY
INNER JOIN MBDDX_EXPERIMENT
ON MBDDX_STUDY.ID = MBDDX_EXPERIMENT.STUDY_ID
INNER JOIN (SELECT COUNT(MBDDX_TREATMENT_GROUP.GROUP_NO)
FROM MBDDX_TREATMENT_GROUP)
ON MBDDX_TREATMENT_GROUP.STUDY_ID = MBDDX_STUDY.ID
GROUP BY MBDDX_STUDY.STUDY_NAME
I keep getting the error:
ORA-00904: "MBDDX_TREATMENT_GROUP"."STUDY_ID": invalid identifier
Is it because it is outside of the inner join bracket, i.e. out of scope? I am very new to SQL and cannot understand why it wont work. I can get it working using select subqueries (without joins) but I want to also be able to work with joins.
If it matters any I am using Toad for Oracle.
Thanks.
Because you join with a query. Give a name to that query, and refer to it that way:
SELECT MBDDX_STUDY.STUDY_NAME
, COUNT ( MBDDX_EXPERIMENT.STUDY_ID )
AS NUMBER_OF_EXPERIMENTS
FROM MBDDX_STUDY
INNER JOIN MBDDX_EXPERIMENT
ON MBDDX_STUDY.ID = MBDDX_EXPERIMENT.STUDY_ID
inner JOIN ( SELECT study_id, COUNT ( MBDDX_TREATMENT_GROUP.GROUP_NO )
FROM MBDDX_TREATMENT_GROUP group by study_id ) AS my_query
ON my_query.STUDY_ID = MBDDX_STUDY.ID
GROUP BY MBDDX_STUDY.STUDY_NAME
For one thing, a subquery must have an alias. Change:
inner JOIN ( SELECT COUNT ( MBDDX_TREATMENT_GROUP.GROUP_NO )
FROM MBDDX_TREATMENT_GROUP )
ON MBDDX_TREATMENT_GROUP.STUDY_ID = MBDDX_STUDY.ID
to
inner JOIN ( SELECT COUNT ( MBDDX_TREATMENT_GROUP.GROUP_NO )
FROM MBDDX_TREATMENT_GROUP ) as CountAlias
ON MBDDX_TREATMENT_GROUP.STUDY_ID = MBDDX_STUDY.ID
The second thing is that you have to include all columns you plan to use. Right now, the subquery just selects a count, but the ON clause references STUDY_ID. You can fix that by including STUDY_ID in the subquery select list, like:
inner JOIN (
SELECT STUDY_ID
, COUNT(MBDDX_TREATMENT_GROUP.GROUP_NO) as GroupCount
FROM MBDDX_TREATMENT_GROUP) as CountAlias
ON MBDDX_TREATMENT_GROUP.STUDY_ID = MBDDX_STUDY.ID
Now after that, you might hit other issues, but I'm hoping this will get you started.
I have 3 tables, where the first one's primary key, is the foreign key in the other 2.
I want to extract one field from the first table, and then a count from the other 2, all joined using the pk and fk. This is what I have so far:
SELECT MBDDX_STUDY.STUDY_NAME, COUNT(MBDDX_EXPERIMENT.STUDY_ID) AS NUMBER_OF_EXPERIMENTS
FROM MBDDX_STUDY
INNER JOIN MBDDX_EXPERIMENT
ON MBDDX_STUDY.ID=MBDDX_EXPERIMENT.STUDY_ID
INNER JOIN (SELECT COUNT(MBDDX_TREATMENT_GROUP.GROUP_NO) AS NUMBER_OF_GROUPS
FROM MBDDX_TREATMENT_GROUP)
ON MBDDX_TREATMENT_GROUP.STUDY_ID = MBDDX_STUDY.ID
group by MBDDX_STUDY.STUDY_NAME, MBDDX_TREATMENT_GROUP.STUDY_ID
But, i get an error saying that the MBDDX_TREATMENT_GROUP.STUDY_ID , in the penultimate line is an invalid indentifier. It is a correct table.
Any advise please.
Thanks.
You're getting the error because that column is not in your SELECT, so it can't GROUP BY a field it doesn't have.
The subquery syntax doesn't seem to make any sense to me. You've made a query that counts all rows of MBDDX_TREATMENT_GROUP, independently of the STUDY_ID, and then tries to join it into the table with a join condition that doesn't refer to anything in the subquery's results (and can't, without an alias).
Why not use a simple join? Assuming MBDDX_EXPERIMENT also has a primary key ID, you can do it with a COUNT-DISTINCT:
SELECT
MBDDX_STUDY.ID, MBDDX_STUDY.STUDY_NAME,
COUNT(DISTINCT MBDDX_EXPERIMENT.ID) AS NUMBER_OF_EXPERIMENTS
COUNT(DISTINCT MBDDX_TREATMENT_GROUP.GROUP_NO) AS NUMBER_OF_GROUPS
FROM
MBDDX_STUDY
INNER JOIN MBDDX_EXPERIMENT ON MBDDX_EXPERIMENT.STUDY_ID=MBDDX_STUDY.ID
INNER JOIN MBDDX_TREATMENT_GROUP ON MBDDX_TREATMENT_GROUP.STUDY_ID=MBDDX_STUDY.ID
GROUP BY
MBDDX_STUDY.ID, MBDDX_STUDY.STUDY_NAME
(MBDDX_STUDY.STUDY_NAME technically shouldn't be necessary to include in the GROUP BY expression according to ANSI SQL as it has a functional dependency on STUDY_ID. However it is necessary on Oracle, which can't spot the dependency.)
You don't need to group by this field (MBDDX_TREATMENT_GROUP.STUDY_ID). It should be just group by MBDDX_STUDY.STUDY_NAME
If my understanding is correct,You need a record from first table and have the count of related records in the other two tables.Here is the answer
SQL:Getting count from many tables for a user record in USER table.Whats the best approach?
It looks like you need to alias the second subquery and need to include something to join on.
It also looks like you aren't using the count you have in the subquery as well.
Try this out:
SELECT MBDDX_STUDY.STUDY_NAME
, COUNT(MBDDX_EXPERIMENT.STUDY_ID) AS NUMBER_OF_EXPERIMENTS
FROM MBDDX_STUDY
INNER JOIN MBDDX_EXPERIMENT
ON MBDDX_STUDY.ID=MBDDX_EXPERIMENT.STUDY_ID
INNER JOIN (SELECT STUDY_ID, COUNT(MBDDX_TREATMENT_GROUP.GROUP_NO) AS NUMBER_OF_GROUPS
FROM MBDDX_TREATMENT_GROUP GROUP BY MBDDX_TREATMENT_GROUP.STUDY_ID) xx
ON xx.STUDY_ID = MBDDX_STUDY.ID
GROUP BY MBDDX_STUDY.STUDY_NAME, xx.STUDY_ID
For what you really want to do, you want OUTER JOINs.
WITH number_of_experiments
AS ( SELECT study_id
, count ( * ) CNT
FROM MBDDX_EXPERIMENT
group by study_id )
, number_of_groups
as ( select study_id
, count ( * ) CNT
FROM mbddx_treatment_group
group by study_id )
select study_name
, coalesce(noex.cnt,0)
, coalesce(notr.cnt,0)
from mbddx_study
outer join number_of_experiments
as noex
using ( study_id )
outer join number_of_groups
as nogr
using ( study_id )