Hi SQL Gurus,

I need to join two tables say Table I and Table W

Table I is like below

Numbers Values
1 A
1 B
2 C
3 D

Table W is Like Below
Numbers Boolean
1 Yes
1 Yes
2 Yes
3 Yes

I need to query to join Table I and W where Boolean value is Yes in Table W but there is no D in Table I in Oracle database. The answer would be
Number
1
2
Can someone help me get a query?

Hey, your requirement is confusing. What does it mean by "where Boolean value is Yes in Table W but there is no D in Table I in Oracle database"

If there is no value D in table I then when you join both the tables on numbers, you will automatically get the those two numbers as you distinct them. Not sure, what your question is actually?

First join like this:
select i.Numbers as Number from I i join W w on i.Numbers = w.Numbers
Then use filter to get the record you need:
where w.Boolean="Yes" and i.Values != 'D'

Actual query depends on database you are using.

try this..very generic

select * from i where values  <> 'D' and numbers in (select numbers from w where boolean = 'Y')

- Jaxnepali

There is an online application for testing and sharing SQL queries called SQLFiddle.com.
Here's a quick fiddle I created for you.
http://sqlfiddle.com/#!9/393cc/4

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