IN is supported in 4.1, I'm not sure about 4.0. But any, you can do you
query like this:
select table1.* from table1
left join table2 on table1.item_id=table2.item_id
where table2.item_id is not null
I think that's right. It may actually be quicker than using IN.
On Feb 6, 2004, at 2:20 PM,
IN is supported in mysql, but subqueries do not work before 4.1.x. You
could rewrite your query with a join, though. Something like:
SELECT table1.* FROM table1, table2
WHERE table1.item_id = table2.item_id
See http://www.mysql.com/doc/en/Rewriting_subqueries.html for more.
Michael
Scott
From: Scott Purcell [mailto:[EMAIL PROTECTED]
I am trying to run the below query, and believe that the 'IN'
is not supported in mysql. What is the 'IN' replacement? I
tried exists and that doesn't work.
select * from table1
where item_id IN (select item_id from table2)
IN has been
This will work, but there's no reason to use a LEFT JOIN here. With a
LEFT JOIN, you get a row for each item_id in table1 that does not have a
corresponding item_id in table2, with the table2 fields set to NULL.
You then have to filter these out with your WHERE clause. Just use a
simple
My thinking on using a left join was that there was not a one to one
relationship between the tables, otherwise the data would be in one
table. So a regular join would produce duplicate records if there was a
one to many relationship between table1 and table2. A left join would
assure a
Brent Baisley wrote:
My thinking on using a left join was that there was not a one to one
relationship between the tables, otherwise the data would be in one
table. So a regular join would produce duplicate records if there was a
one to many relationship between table1 and table2. A left join
