The left join - no data in the table don't want to display the data from the table one
HelloI'm writing a query. Here is my scenario, I have two tables EMP and EMP_TYPE. I want to join both the table and even if there is no matching record in the table for EMP EMP_TYPE, I want to return the record to the EMP table and empty values of EMP_TYPE.
create table EMP
(
EMPID NUMBER(10,2),
EMPNAME VARCHAR2(100)
);
INSERT INTO emp (empid,empname) values (1, 'abc');
INSERT INTO emp (empid,empname) values (2, 'xyz');
INSERT INTO emp (empid,empname) values (3, 'UNJ');
create table EMP_Type
(
ID NUMBER(10,2),
EMPID NUMBER(10,2),
TYPE_ID NUMBER(10,2),
END_DATE DATE
);
INSERT INTO EMP_Type(id, empid, TYPE_ID, END_DATE) values (100, 2, 1, SYSDATE);
select *
from emp e
left outer join emp_Type t
on e.empid = t.empid
and t.type_id = 1
returns.
EMPID EMPNAME ID EMPID TYPE_ID END_DATE
2.00 xyz 100.00 2.00 1.00 10/9/2012 5:18:59 PM
3.00 UNJ
1.00 abc
select *
from emp e
left outer join emp_Type t
on e.empid = t.empid
and t.type_id = 1
and t.empid = 3
returns
EMPID EMPNAME ID EMPID TYPE_ID END_DATE
2.00 xyz
3.00 UNJ
1.00 abc
but instead I want
EMPID EMPNAME ID EMPID TYPE_ID END_DATE
3.00 UNJ
Your conditions of conflict
>
and t.type_id = 1
and t.empid = 3
>
There is a record with t.empid 3
select *
from empx e, empx_Type t
where e.empid = 3
and e.empid = t.empid (+)
EMPID,EMPNAME,ID,EMPID_1,TYPE_ID,END_DATE
3,UNJ,,,,
Tags: Database
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How could do?
My current request is as
Select distinct Curepress, lastpcirim, typeidcontainer
BETMASTER STD left join INF BETINFO
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Thank you
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Hi, Mahesh,
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And you want the row to contain a list of all different typidcontainers-delimited? This sounds like a job for the aggregate LISTAGG function.
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OF betmaster STD
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1
3
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OF joined_data
Curepress GROUP, lastpcirim
;
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---
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Seen the lock of brain on Left Join
Always on Oracle 11.2.0.1.0
Examples of data
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AND this:SELECT p.employee, p.recordNum, p.lastName, p.firstName, e.emailaddress, e.emailactive, e.emailtype FROM thePeople p LEFT JOIN theemails e ON p.employee = e.employee WHERE (e.emailactive = 1) AND (e.emailtype = 'WRK1') AND (e.emailaddress LIKE '%school.edu') ;
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231509 | 0 | P | Michelle | [email protected] | 1. WRK1
But what I need is the following:
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239868 | 0 | K | Dan | | |
231509 | 0 | P | Michelle | [email protected] | 1. WRK1
239865 | 0 | T | Mary | |
Email from Dan is not included, because his "wrk1" email does not stop it school.edu
E-mail Mary is not included, because his 'wrk1' email is not active.
However, I need to come back with their numbers of name registration and employee.
Once it works, I'll add employee = number in the WHERE clause, because I only need to find a person both for the actual production.
What I am doing wrong?
Thank you!
MichelleHello
WHERE is the filtering actually record the selection.
In your case, you might want to include in your LEFT OUTER JOIN ON conditions:
SELECT p.employee, p.recordnum, p.lastname, p.firstname , e.emailaddress, e.emailactive, e.emailtype FROM thepeople p LEFT JOIN theemails e ON p.employee = e.employee AND e.emailactive = 1 AND e.emailtype = 'WRK1' AND e.emailaddress LIKE '%school.edu';
If you put them in your JOIN conditions actually join Chronogram of table theemails that adapt to the conditions of membership.
As you use LEFT [OUTER] JOIN unmatched chronogram thepeople table will be displayed even when the theemail table column appears with a NULL value in the output filesI hope that I was able to unlock your brain. :-)
Kind regards.
AlPublished by: Alberto Faenza on 25 October 2012 16:58
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