Case statement trickery required - sql

Question

Table 1
Mail Special Quote (Y/N)
g#hotmail.com Blank
s#ho.com Blank
sss#j.com Blank
Table 2
Email Address Dept
g#hotmail.com Config
s#ho.com Finance
sss#j.com Marketing
Now I want Table 1 updated to Y where the matching email address in Table 2 is coming from Finance or Marketing .
UPDATE TABLE 1
Set Special Quote to be Y
where in TABLE 2 the Dept is Finance or Marketing for the matching email address.
Probably just having a brain freeze and need some coffee .
Thinking left join on email address then throw in a bit of a case statement perhaps for the Y and N bit ?

Answer 1

no case statement needed.
update table1 set special_quote = 'Y'
where mail in ( select email_address from table2 where dept in ('Finance','Marketing' ))

Answer 2

Try the following:
UPDATE A
SET A.SpecialQuote = 'Y'
FROM Table1 A
INNER JOIN Table2 B
ON A.Mail = B.EmailAddress
WHERE B.Dept IN ('Finance','Marketing')

Answer 3

I'm more of a MySQL user so this could be wrong, but try something like this:
UPDATE table1 SET specialquote = 'Y'
WHERE Mail IN (SELECT EmailAddress FROM table2 WHERE Dept IN ('Finance','Marketing'))

Answer 4

You were very close, you will need to join the two tables on the mail field but then check if the Dept is in Finance/Marketing
UPDATE t1
SET t1.[Special Quote] = 'Y'
FROM Table1 t1
INNER JOIN Table2 t2
ON t1.mail = t2.mail
WHERE t2.Dept in ('Finance','Marketing')
This will update only the items that are included, if you want to update either Y/N, then you could do the following (see SQL Fiddle with Demo)
UPDATE t1
SET t1.sq = CASE WHEN t2.dept IS NOT NULL THEN 'Y' ELSE 'N' END
FROM table1 t1
LEFT JOIN table2 t2
ON t1.mail = t2.mail
AND t2.Dept in ('Finance','Marketing')

Answer 5

You are on the right track. Here is the syntax:
update table1
set SpecialQuote = 'Y'
where mail in (select emailaddress from table2 where dept in ('Finance', 'Marketing')

Answer 6

create table #tbl1 (mail varchar(50),quote varchar(1))
create table #tbl2 (mail varchar(50),dept varchar(10))
insert into #tbl1 values ('a#a.com','')
insert into #tbl1 values ('b#b.com','')
insert into #tbl1 values ('c#c.com','')
insert into #tbl1 values ('d#d.com','')
insert into #tbl1 values ('e#e.com','')
insert into #tbl2 values ('a#a.com','config')
insert into #tbl2 values ('b#b.com','finance')
insert into #tbl2 values ('c#c.com','marketing')
insert into #tbl2 values ('d#d.com','other')
insert into #tbl2 values ('e#e.com','skivers')
update #tbl1
set quote = 'Y'
where mail in (SELECT mail FROM #tbl2 WHERE dept IN ('finance','marketing'))
select * from #tbl1
drop table #tbl1
drop table #tbl2

Answer 7

I like to use CTEs to help clarify different pieces of a query, so here is one way to do this. There are others if you don't like it.
with getval as (
select mail,dept from test2
where dept in ('Marketing','Finance')
)
update test1
set quote = case when dept is NOT null then 'Y' else 'N' end
from test1 t1
left outer join getval t2 on t1.mail = t2.mail
Anyway, I used a left join to take all of the records, then used a case to sort where the dept appeared (meaning the record was found in the CTE).
OR...
update table1
set quote = case when dept is NOT null then 'Y' else 'N' end
from table1 t1
left outer join table2 t2 on t1.email = t2.email and t2.dept in ('Marketing','Finance')
That should also work.

Answer 8

Update Table1
Set [Special Quote]='Y'
from Table1 t1
join Table2 t2
on t1.[Email Address]=t2.[Email Address]
where t2.dept in ('Finance','Marketing')
Untested sample, so understand that caveat, but believe it is close enough to illustrate the point. Good luck!
EDIT: Per the OP's "Y/N update" comment below, change as follows...although there are several other subtly different ways you could accomplish the same thing. Hope this helps you.
Update Table1
Set [Special Quote]=(case when t2.dept='Finance'
then 'Y'
when t2.dept='Marketing'
then 'Y'
else 'N'
end)
from Table1 t1
join Table2 t2
on t1.[Email Address]=t2.[Email Address]