This week's book giveaway is in the Web Services forum.
We're giving away four copies of Microservices in Action and have Morgan Bruce & Paulo A. Pereira on-line!
See this thread for details.
Win a copy of Microservices in Action this week in the Web Services forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Bear Bibeault
  • Devaka Cooray
  • Liutauras Vilda
  • Jeanne Boyarsky
Sheriffs:
  • Knute Snortum
  • Junilu Lacar
  • paul wheaton
Saloon Keepers:
  • Ganesh Patekar
  • Frits Walraven
  • Tim Moores
  • Ron McLeod
  • Carey Brown
Bartenders:
  • Stephan van Hulst
  • salvin francis
  • Tim Holloway

How to combine queries  RSS feed

 
Ranch Hand
Posts: 41
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have 2 sql's and want to know how to combine.
SQLS simplied:

SQL1 =
select A.number, B.sn
from A, B
where A.id = B.id
and B.typecd =' O'

SQL1 returns for example
A.number = 12345Z
B.sn = 2222

SQL2 =
select B.name, A.dob, A.sn
from A, B
where A.id = B.id
and B.typecd = 'P'
and A.number = '12345Z'
and B.sn = '2222'

How can these 2 SQLs be combined to return results for SQL2?
Currently I run SQL1 and take those results and plug into SQL2. Currently OK but could be better?
Thanks!
 
Rancher
Posts: 42974
76
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Well, the first query requires " B.typecd =' O' " whereas the second requires " B.typecd = 'P' ", so no records can fulfill that. Or is that just a typo?
 
M Wilson
Ranch Hand
Posts: 41
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
'O' stands for the organization, 'P' stands for the person/people of the organization.
I want to retrieve data is that an organization, therefore SQL for typecd 'O'
and from result of typecd 'O' get the person's name. I want the person's name that is related to the organization.

For example SQL1 typecd 'O' returns name 'THE TRUST OF JOHN AND MARY DOE'
SQL2 typecd 'P' return 2 rows:
row1: name 'DOE, JOHN' sn='2222'
row2: name 'DOE, JANE' sn='1111'

I want the person's name with sn='2222' for the organization.

Thanks!
 
Ranch Hand
Posts: 133
Hibernate Java Oracle
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
you can use union operation as an option.

Before that if you can, please put here sample rows from table A and B both, and rephrase what result you are looking for.


 
Bartender
Posts: 3648
16
Firefox Browser Java Mac OS X
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

M Wilson wrote:'O' stands for the organization, 'P' stands for the person/people of the organization.
I want to retrieve data is that an organization, therefore SQL for typecd 'O'
and from result of typecd 'O' get the person's name. I want the person's name that is related to the organization.



Given your sql1 is organization O and sql2 is people P. So if I understand you correctly, you want "select sql2 from sql1".

If so the from clause in sql2 will basically be your sql1. But then your subquery sql1 should have all the columns you need in sql2 too. Or you will be joining 3 things making it look messy.

 
M Wilson
Ranch Hand
Posts: 41
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
This is what I was looking for and got it figure out a couple of weeks ago, I thought I post and share (it's not the actual SQL but structured as so and worked for what I was trying to do)
it's sql in a sql SELECT...WHERE IN (SELECT...)

SELECT *
FROM A
WHERE A.NUMBER IN (SELECT A.NUMBER FROM B INNER JOIN A ON B.NUMBER = A.NUMBER AND B.TYPECD = 'O' ) AND B.PARTY_CD = 'P'
FETCH FIRST 1 ROWS ONLY

 
Consider Paul's rocket mass heater.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!