Distinct rows from two tables linked by a third one

Hi,
I need to write an SQL sentence to bring a group of DISTINCT rows, each row in a form of: A.X, A.Y, C.IDBOLETA. Tables A and C are linked through the table C, as follow:
Table A: INDUSTRIAGEO
NIT VARCHAR2(20) NOT NULL,
CORRELAIGEO NUMERIC(2) NOT NULL,
NOMBREAGENCIA VARCHAR2(255) NOT NULL,
DIRECCION VARCHAR2(255),
X NUMERIC(12,8) NOT NULL,
Y NUMERIC(12,8) NOT NULL,
CONSTRAINT PKGEOINDUST PRIMARY KEY(NIT, CORRELAIGEO),
CONSTRAINT FKGEOINDUST FOREIGN KEY(NIT) REFERENCES INDUSTRIA(NIT)
Table B: ANALISIS
IDANALISIS NUMERIC(12) NOT NULL,
NIT VARCHAR2(20) NOT NULL,
CORRELAIGEO NUMERIC(2) NOT NULL,
FECHA DATE NOT NULL,
IDINSPECTOR NUMERIC(4) NOT NULL,
CONSTRAINT PKANALISIS PRIMARY KEY(IDANALISIS),
CONSTRAINT FKANALGEOI FOREIGN KEY(NIT, CORRELAIGEO) REFERENCES INDUSTRIAGEO(NIT, CORRELAIGEO),
CONSTRAINT FKANALINSP FOREIGN KEY(IDINSPECTOR) REFERENCES INSPECTOR(IDINSPECTOR)
Table C: ANALISISBOLETA
IDANALISIS NUMERIC(12) NOT NULL,
CORRELAANALISIS NUMERIC(2) NOT NULL,
IDBOLETA NUMERIC(12) NOT NULL,
IDCATEGORIAINDUSTRIA NUMERIC(3) NOT NULL,
CONSTRAINT PKANALBOLE PRIMARY KEY (IDANALISIS, CORRELAANALISIS),
CONSTRAINT UKANALBOLE UNIQUE (IDBOLETA),
CONSTRAINT FKANALBOLE FOREIGN KEY(IDANALISIS) REFERENCES COPS.ANALISIS(IDANALISIS),
CONSTRAINT FKANALCATI FOREIGN KEY(IDCATEGORIAINDUSTRIA) REFERENCES COPS.CATEGORIAINDUSTRIA(IDCATEGORIAINDUSTRIA)
Thanks for your help!!!
Mario

Perhaps
select distinct a.x,a.y,c.idboleta
from industriaego a,
       cops.analisis b,
       analisisboleta c
where a.nit = b.nit
   and a.correlaigeo = b.correlaigeo
   and b.idanalisis = c.idanalisisRegards
Etbin
Edited by: Etbin on 4.5.2010 21:42
the copy/paste elf did it again: b.correlaigeo instead of b.a.correlaigeo (as in the OP's comment below)

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Hi,
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http://www.myshortpencil.com/schooltalk/messages/85/515.html?971794944

Select unique rows from two tables...

Hi,
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I cannot figure out why it won't work. the way I understand it is that, distinct will give all distinct combination of all column names that follow, which is what I want...
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Thanks a lot Mohan for your reply.
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Something like below perhaps? Btw, I recommend using catalog view and dynamic management views instead of the old system tables (now called compatibility views)...
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Tibor Karaszi, SQL Server MVP |
web | blog

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1 |    111    | 123
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I need to retrive information from 3 different tables by applying a specific condition.
I have the following query which works fine for retrieving desired data from 2 tables.
SELECT
a.userId
FROM userGeneral
a inner
join userSpecific
b on a.userId
= b.userId
WHERE
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= 1
userId
111
222
333
444
Now I have a third table called userMgr which may contain multiple records for each userId with a corresponding mgrId value. It has a primary key identity column called userRecId and I would like to fetch the
mgrId value corresponding to the MAX(userRecId) for the matching userId.
userRecId  | userId  | mgrId
1 |    111    | 123
2 | 111 | 234
3 | 111 | 345
4 | 333 | 345
5 | 333 | 456
The resultset should be as follows after joining all the 3 tables.
userId | mgrId
111 | 345
222 | NULL
333 | 456
444 | NULL
Can anyone please help with this query.
try this:
select userId,userRecId,
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I need to produce a list of unique PID's showing the following fields - PID, VName, PName, PColor
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SELECT P.PID, V.VName, P.PName, P.PColor
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If you post DDL, sample data and your desired output based on that sample data, someone can probably create a query that does what you want.
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Hi,
I have one performance problem...
Here is sample scenario...
TableA
A1 A2 A3
a1     a12     a13
a2     a22     a23
a3     a32     a33
TableB
B1     B2     B3
b1     b12     b13
b2     b22     b23
I want result like
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a1     b1     a12     b12
a2     b2     a22     b22
I have written it like
select
A1,
B1,
A2,
B2
from
(select A1, A2, rownum rnA from TableA) a,
(select B1, B2, rownum rnB from TableB) b
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but suppose TableA has 2500000 rows and
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Is there any smart solution..?
I have created indexes for on columns A1, (A1,A2,A3), B1, (B1,B2,B3).
Curious:)
Rushang Kansara
Message was edited by:
Rushang Kansara

Here is explain plan
SELECT STATEMENT, GOAL = FIRST_ROWS               Cost=5     Cardinality=67     Bytes=3618
HASH JOIN               Cost=5     Cardinality=67     Bytes=3618
VIEW     Object owner=SFMFG          Cost=2     Cardinality=82     Bytes=2214
COUNT
TABLE ACCESS FULL     Object owner=SFMFG     Object name=TABLEA     Cost=2     Cardinality=82     Bytes=1148
VIEW     Object owner=SFMFG          Cost=2     Cardinality=82     Bytes=2214
COUNT
TABLE ACCESS FULL     Object owner=SFMFG     Object name=TABLEB     Cost=2     Cardinality=82     Bytes=1148
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Hi,
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========================================================================
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0989.726332
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CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE CASCADE); Set Foreign Keys to Null When Parent Key Deleted The ON DELETE SET NULL action allows data that references the parent key to be deleted, but not updated. When referenced data in the parent key is deleted, all rows in the child table that depend on those parent key values have their foreign keys set to null. To specify this referential action, include the ON DELETE SET NULL option in the definition of the FOREIGN KEY constraint. For example:
CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE SET NULL);
SQL> conn scott/tiger
Connected.
SQL> create table ppk ( no number primary key);
Table created.
SQL> begin for inn in 1..10 loop insert into ppk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> create table ffk ( no number references ppk(no));
Table created.
SQL> begin for inn in 1..10 loop insert into ffk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> drop table ppk cascade constraints;
Table dropped.Message was edited by:
user52
Message was edited by:
user52
Message was edited by:
user52

Distinct rows from two tables linked by a third one

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