PowerBI - Help with a nested join

Hello:
I am relatively new to PowerBI and am trying to optimize my queries. Can you please advise on one or both questions below?
1. I have two external data sources, both SQL Server. I created two queries - one gets all students with a lastname starting with a letter and the second gets all students living in a certain state. I want to join the results of both queries which are pulling
from the same table. The result of my query is as below:
let
Source = Sql.Database("server", "database", [Query="select * from students where state = 'ca'"]),
Merge = Table.NestedJoin(Source,{"LastName"},NameQuery,{"LastName"},"NewColumn",JoinKind.Inner)
in
Merge
The net result of this according to SQL profiler is that it pulls all 20,000 records for the name query and all 50,000 records for the state query and then appears to merge them in PowerQuery. I was expecting that the merge / join would pass this query down
to the database and do the join there instead. Perhaps I missed a step in setting up the Query.
2. Assuming #1 is possible, what if I wanted to achieve the same behavior with OData? Although I am very familiar with the OData filter syntax, how setting up the relationship in PowerQuery and pre-generating the query seems like it would not be possible
but that's why I am looking for answers!
Thanks.

Thank you for the response(s).
Can we dive just a bit deeper? Instead of specifying a query, I added just the connection and database. In the navigator I chose a view and created a connection (only) from it. I filtered this view (in PQ) to only return columns that matched a given value.
I then created another query using the same connection as above and did a merge against my first dataset on the rowkey column in order to get the filtered result. I did not specify any queries. The result was still two queries, one filtered one not versus
a singular query joined at the keys.
For OData I am gathering that you are saying that my service has to include the columns through something like the expand method. Is there any documentation you can point me to regarding query generation of OData endpoints in Power BI?

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fabio_silva wrote:
Hi,
I just didn't get. The table (pm_requirements_table pm) haven't any join ???
Regards,Forgive the ASCII art, but your query looks like:
---------- JOIN ----------
| Alias M | ====> | Alias L |
| Alias PM |
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SQL> select * from t1;
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Hello -
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Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

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SELECT
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Scrap the "DISTINCT" and try something like this:
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Could someone help me with an exercise I'm working on? This isn't "homework", per se, as it's not an assignment, I'm just doing my own personal research.
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http://download.oracle.com/docs/cd/B19306_01/server.102/b14223/aggreg.htm#sthref1670
http://www.oracle.com/technology/products/oracle9i/daily/oct10.html
http://www.dba-oracle.com/t_sql99_with_clause.htm
http://www.psoug.org/reference/with.html
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4      select 3 dept_id, 'MNO' dept_name from dual )
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6 select * from dept;
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Hi,
Below are the details of what I am attempting to do.
DB version: 10.2.0.4.0
Sample Table Definition
create table t_cnf
conf_id number,
conf_value number,
conf_cat_id number,
actv_flg    char(1)
create table t_int_act
int_acc_id   number,
frst_mrch_id number,
create_date date
create table t_int_act_cast
int_acc_id   number,
cast_id      number
create t_cast_alt_nmnt
cas_alt_nmt_id number,
cas_alt_id     number,
cast_id        number,
enrl_flg       char(1),
src_id         number
);Sample Data
insert into t_cnf values (1, 78965098, 12, 'Y');
insert into t_cnf values (1, 78965098, 13, 'Y');
insert into t_int_act values (234,78965098, trunc(sysdate) - 1);
insert into t_int_act_cast values (234, 560432);
insert into t_cas_alt_nmnt values (1, 2, 560432, 'Y', 2); Need to fetch all cast_ids that are not in t_cast_alt_nmnt or cast_ids that are present in t_cast_alt_nmnt but have t_cast_alt_nmnt.enrl_flg = 'N' and t_cast_alt_nmnt.cast_alt_id in (2,3) and t_cast_alt_nmnt.src_id <> 2
for t_int_act.frst_mrch_ids matching t_cnf.conf_vale
Records fetch will insert a record into t_cast_alt_nmnt with css_alt_id 2 or 3 (determined by pe_or_pd).
I attempted to write below sql. This works fine when cast_id does not exists in t_cast_alt_nmnt but will not return correct results when there is a record in t_cast_alt_nmnt matching above criteria.
select
    iac.cast_id                            cast_id,
    sysdate                                upd_date,
    case
        when c.conf_cat_id = 12 then 2
        when c.conf_cat_id = 13 then 3
    end
        pe_or_pd
from
    t_cnf                  c
join
    t_int_act          ia
on
    ia.frst_mrch_id = c.conf_value
join
    t_int_act_cast iac
on
    ia.int_acc_id = iac.int_acc_id
left join
    t_cast_alt_nmnt     can
on
    can.cast_id = iac.cast_id     and
    can.enrl_flg = 'N'            and
    can.cas_alt_id in (2,3)       and
    can.src_id <> 2
where
    c.conf_cat_id              in (12,13)                           and
    c.actv_flg                 = 'Y'                                and
    -- Fetch all new customer created day before.
    ia.create_date             >= trunc(sysdate) - 1
    Expected results
With no cast_id record in t_cast_alt_nmnt
cast_id upd_date pe_or_pd
560432 4/19/2012 2
560432 4/19/2012 3
With cast_id record in t_css_alt_nmt (insert provided)
cast_id upd_date pe_or_pd
560432 4/19/2012 3
Appreciate your help
Edited by: user572194 on Apr 19, 2012 1:04 PM

Thanks Frank for taking time to look into this and providing sql. I will test is against use cases (mentioned below).
And I apologize for the typos. I had to change table and column names as it is policy of our company not to post data model details in public forums.
Requirement:
1. New cast ids will be added daily and these will get inserted into t_int_act and t_int_act_cas
2. t_cnf has 2 conf_cat_id configured 12 and 13 and each conf_cat_id will have same conf_values (same as t_int_act.frst_mrch_id) but actv_flg might be different (set to N for 12 and Y for 13). Need to fetch only active ones
3. t_cas_alt_nmnt will have cast_ids that are enrolled to receive certain mails if enrl_flg is Y for these. Not all cast_ids will have record in this table.
When a cast_id is enrolled by customer service, a record will get inserted with src_id = 2.
4. Requirement is to enroll new cast_ids created with frst_mrch_id matching t_cnf.conf_value where conf_cat_id in (12,13)
Match criteira:
If t_int_act_cas.cast_id exists in t_cas_alt_nmnt and have enrl_flg = 'Y' for cas_alt_id = 2 then
insert record with same cast_id, enrl_flg = 'Y' and css_alt_id = 3
If t_int_act_cas.cast_id exists in t_cas_alt_nmnt and have enrl_flg = 'Y' for cas_alt_id = 3 then
insert record with same cast_id, enrl_flg = 'Y' and css_alt_id = 2
If t_int_act_cas.cast_id exists in t_cas_alt_nmnt and have enrl_flg = 'N' for cas_alt_id in (2,3) and src_id = 2 then
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if t_int_act_cas.cast_id not exists in t_cas_alt_nmnt then
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Hope above explanation makes sense.
By the way I tried below sql. Yet to test it for all use cases but it worked for the last two.
Note on PE_OR_PD column. I am just using this column to write separate inserts for css_alt_id 2 and 3.
select
     cast_id,
     upd_date,
     pe_or_pd
from
     (select
                iac.cast_id                        cast_id,
                sysdate                            upd_date,
                case
                    when c.conf_cat_id = 12 and can.cas_alt_id in (2,3) and enrl_flg = 'Y' then null
                    when c.conf_cat_id = 13 and can.cas_alt_id in (2,3) and enrl_flg = 'Y' then null
                    when c.conf_cat_id = 12 and nvl(can.cas_alt_id,2) = 2 and nvl(can.enrl_flg,'Y') = 'N' and can.src_id <> 2 then 'PE'
                    when c.conf_cat_id = 13 and nvl(can.cas_alt_id,3) = 3 and nvl(can.enrl_flg,'Y') = 'N' and can.src_id <> 2 then 'PD'
                    when c.conf_cat_id = 12 and nvl(can.cas_alt_id,2) = 2 and nvl(can.enrl_flg,'Y') = 'Y' then 'PE'
                    when c.conf_cat_id = 13 and nvl(can.cas_alt_id,3) = 3 and nvl(can.enrl_flg,'Y') = 'Y' then 'PD'
                end
                    pe_or_pd
            from
                t_cnf              c,
                t_int_act          ia,
                t_intl_act_cus     iac,
                t_cas_alt_nmnt     can
            where
                c.conf_value               = ia.frst_mrch_id               and
                ia.internal_account_id     = iac.int_act_id                and
                can.cast_id(+)             = iac.cast_id                   and
                c.conf_cat_id              in (12,13)                      and
                c.actv_flg                 = 'Y'                           and
                -- Fetch all new customer created after last run.
                ia.create_date             >= trunc(sysdate) - 1
     ) enrl_cust
where
    pe_or_pd is not null
                ;

Help with left outer join

Hi,
I Have this database structure:
Artist(IDA,Name,Year_b)
Work(IDW,Title,IDA,IDL)
City(IDL,IName,Nation)
I Want to do a query that retrieve for one Artist all Works availables on database and,if present,the City where each work was realized.
This SQL code is correct?
SELECT Name,Title,IName
FROM Artist a,
Work w LEFT OUTER JOIN City c ON w.IDL=c.IDL
WHERE w.IDA=a.IDA and a.IDA='2';
If it's not correct, what type of correction need it?
Thanks for Help
Andrea

If you asked... The original query works, but it is not "right".
You should use either the old Oracle style of joins, like in the VM's query, or, better, the ANSI join style, recommended by Oracle (not a mix of them, like in your query):
SELECT a.name,
       w.title,
       c.iname
FROM artist a
JOIN work w
   ON w.ida = a.ida
LEFT OUTER JOIN city c
   ON w.idl = c.idl
WHERE a.ida = '2'

[8i] Need help with full outer join combined with a cross-join....

I can't figure out how to combine a full outer join with another type of join ... is this possible?
Here's some create table and insert statements for some basic sample data:
CREATE TABLE     my_tab1
(     record_id     NUMBER     NOT NULL
,     workstation     VARCHAR2(4)
,     my_value     NUMBER
     CONSTRAINT my_tab1_pk PRIMARY KEY (record_id)
INSERT INTO     my_tab1
VALUES(1,'ABCD',10);
INSERT INTO     my_tab1
VALUES(2,'ABCD',15);
INSERT INTO     my_tab1
VALUES(3,'ABCD',5);
INSERT INTO     my_tab1
VALUES(4,'A123',5);
INSERT INTO     my_tab1
VALUES(5,'A123',10);
INSERT INTO     my_tab1
VALUES(6,'A123',20);
INSERT INTO     my_tab1
VALUES(7,'????',5);
CREATE TABLE     my_tab2
(     workstation     VARCHAR2(4)
,     wkstn_name     VARCHAR2(20)
     CONSTRAINT my_tab2_pk PRIMARY KEY (workstation)
INSERT INTO     my_tab2
VALUES('ABCD','WKSTN 1');
INSERT INTO     my_tab2
VALUES('A123','WKSTN 2');
INSERT INTO     my_tab2
VALUES('B456','WKSTN 3');
CREATE TABLE     my_tab3
(     my_nbr1     NUMBER
,     my_nbr2     NUMBER
INSERT INTO     my_tab3
VALUES(1,2);
INSERT INTO     my_tab3
VALUES(2,3);
INSERT INTO     my_tab3
VALUES(3,4);And, the results I want to get:
workstation     sum(my_value)     wkstn_name     my_nbr1     my_nbr2
ABCD          30          WKSTN 1          1     2
ABCD          30          WKSTN 1          2     3
ABCD          30          WKSTN 1          3     4
A123          35          WKSTN 2          1     2
A123          35          WKSTN 2          2     3
A123          35          WKSTN 2          3     4
B456          0          WKSTN 3          1     2
B456          0          WKSTN 3          2     3
B456          0          WKSTN 3          3     4
????          5          NULL          1     2
????          5          NULL          2     3
????          5          NULL          3     4I've tried a number of different things, googled my problem, and no luck yet...
SELECT     t1.workstation
,     SUM(t1.my_value)
,     t2.wkstn_name
,     t3.my_nbr1
,     t3.my_nbr2
FROM     my_tab1 t1
,     my_tab2 t2
,     my_tab3 t3
...So, what I want is a full outer join of t1 and t2 on workstation, and a cross-join of that with t3. I'm wondering if I can't find any examples of this online because it's not possible....
Note: I'm stuck dealing with Oracle 8i
Thanks!!

Hi,
The query I posted yesterday is a little more complicated than it needs to be.
Since my_tab2.workstation is unique, there's no reason to do a separate sub-query like mt1; we can join my_tab1 to my_tab2 and get the SUM all in one sub-query.
SELECT       foj.workstation
,       foj.sum_my_value
,       foj.wkstn_name
,       mt3.my_nbr1
,       mt3.my_nbr2
FROM       (     -- Begin in-line view foj for full outer join
          SELECT        mt1.workstation
          ,        SUM (mt1.my_value)     AS sum_my_value
          ,        mt2.wkstn_name
          FROM        my_tab1   mt1
          ,        my_tab2   mt2
          WHERE        mt1.workstation     = mt2.workstation (+)
          GROUP BY   mt1.workstation
          ,        mt2.wkstn_name
                UNION ALL
          SELECT      workstation
          ,      0      AS sum_my_value
          ,      wkstn_name
          FROM      my_tab2
          WHERE      workstation     NOT IN (     -- Begin NOT IN sub-query
                                           SELECT      workstation
                                   FROM      my_tab1
                                   WHERE      workstation     IS NOT NULL
                                 )     -- End NOT IN sub-query
       ) foj     -- End in-line view foj for full outer join
,       my_tab3 mt3
ORDER BY foj.wkstn_name
,       foj.workstation
,       mt3.my_nbr1
,       mt3.my_nbr2
;Thanks for posting the CREATE TABLE and INSERT statements, as well as the very clear desired results!
user11033437 wrote:
... So, what I want is a full outer join of t1 and t2 on workstation, and a cross-join of that with t3. That it, exactly!
The tricky part is how and when to get SUM (my_value). You might approach this by figuring out exactly what my_tab3 has to be cross-joined to; that is, exactly what should the result set of the full outer join between my_tab1 and my_tab2 look like. To do that, take your desired results, remove the columns that do not come from the full outer join, and remove the duplicate rows. You'll get:
workstation     sum(my_value)     wkstn_name
ABCD          30          WKSTN 1
A123          35          WKSTN 2
B456          0          WKSTN 3
????          5          NULL          So the core of the problem is how to get these results from my_tab1 and my_tab2, which is done in sub-query foj above.
I tried to use self-documenting names in my code. I hope you can understand it.
I could spend hours explaining different parts of this query in more detail, but I'm sure I'd waste some of that time explaining things you already understand. If you want an explanation of somthing(s) specific, let me know.

Help with query - inner join and case

Hi this is the query I am having troble with, where is the correct place to add the case condition:
SELECT
FROM
END_USER_ORDERS EO
INNER JOIN ORDER_PRODUCTS OP
ON EO.EUO_ID = OP.EUO_ID
INNER JOIN PRODUCTS P
ON OP.PRD_ID = P.PRD_ID
CASE P.PRD_ID -- PROBLEM IS HERE
WHEN 'Online' Then 'Public'
END
INNER JOIN PRODUCT_VERSIONS PV
ON P.PRD_ID = PV.PRD_ID
AND PV.SIT_ID = 'DEFAULT'
AND PV.LOC_ID = 'UK'
LEFT OUTER JOIN ORDER_SESSIONS OS
ON OP.EUO_ID = OS.EUO_ID
AND OP.ORP_SEQ_NO = OS.ORP_SEQ_NO
LEFT OUTER JOIN SESSIONS S
ON OS.SES_ID = S.SES_ID
LEFT OUTER JOIN SUBJECTS SU
ON S.SUB_ID = SU.SUB_ID
WHERE EO.EUO_ID = 'bef8cd51-b398-4521-9350-f3a7c3885c59'
select * from END_USER_ORDERS
order by EUO_DATE desc
Many thanks

hmmm....one more point here, when you change your query use as below:
SELECT
Col1,Col2.... -- specify your columns
,CASE P.PRD_TYPE
WHEN 'Online' Then 'Public'
else P.PRD_TYPE -- to display others as original value
END AS [PRODUCT TYPE]
FROM
END_USER_ORDERS EO

Help with a nested loop

basically i need to make a diamond shape out of asterisks. There should be 11 in the middle and decreasing by 2 each line above and below it, until it reaches 1. Now i've come up with a for loop that prints what i need for the top half of the diamond(but the asterisks are not centered). How would i center them and also print the bottom half of the diamond? here's what i have so far.
import java.io.*;
class diamond{
     public static void main(String[] args)
     int a;
     int b;
          for(a = 1; a <=11; a++)
               for(b = 1; b <= a; b++)
                    System.out.print('*');
          System.out.println();
}here's what it outputs:
Press any key to continue . . .

public class Diamond {
    private static final int MAX = 11;
    private static final int MIN = 1;
    public static void main(String[] args) throws Exception {
        for(int a = MIN; a <= MAX; a++) {
            for(int b = MAX; b >= MIN; b--) {
                if(b <= a) {
                    System.out.print(" *");
                } else {
                    System.out.print(" ");
            System.out.println();
        for(int a = MIN; a <= MAX; a++) {
            for(int b = MIN; b <= MAX; b++) {
                if(b <= a) {
                    System.out.print(" ");
                } else {
                    System.out.print(" *");
            System.out.println();
}And here's my output:
           *

PowerBI - Help with a nested join

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