Hi Don,
On 17.12.15 16.14, Don Wieland wrote:
Hey gang,
I need the ability to produce this end result:
condition a) All clients who have had at least 2 appointments in the last 24
months
condition b) of the set of “condition a” rows, which of those have NO
appointments in the last 6 months
Hi Ben,
On 19.10.15 15.10, Ben Clewett wrote:
I have noticed that an unqualified boolean expression cannot be optimized by
MySQL to use an index in 5.6.24.
For example:
CREATE TABLE t (
i INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
a BOOLEAN NOT NULL,
KEY a (a)
) ENGINE=InnoDB;
This
Hi Shawn,
On 19.10.15 22.33, shawn l.green wrote:
On 10/19/2015 3:48 PM, Roy Lyseng wrote:
Hi Ben,
On 19.10.15 16.07, Ben Clewett wrote:
Hi Roy,
Thanks for the clear explanation.
I guess (hypothetically) the optimizer could see if it has a key, and
then use
two starts: one on 'a >
0' would easily be transformed to a =
1. It would also mean that statistics for the columns would be better, with
TINYINT each value has the estimated probability 1/256, whereas a boolean value
would have probability 1/2.
Thanks,
Roy
Ben.
On 2015-10-19 14:19, Roy Lyseng wrote:
Hi Ben,
On
Hi Christophe,
On 20.03.14 13:18, Christophe wrote:
Hi Michael,
Le 18/03/2014 20:28, Michael Dykman a écrit :
Also, as you currently have it, the expression DATE_SUB(NOW(),
INTERVAL 24 is going to be executed once for every single candidate
row. I would suggest you temporarily memoize that
Hi Jennifer,
please try filtering with a subquery that locates ip addresses with more than 1
attempt:
SELECT ip, page, url, time_stamp
FROM ip_adresses
WHERE existing where clause AND
ip IN (SELECT ip
FROM ip_addresses
WHERE existing where clause
Hi Jennifer,
great that it worked.
Try replacing the line
`ip` IN (temp_ip)
with
`ip` IN (SELECT ip FROM temp_ip)
Each subquery needs to be a complete SELECT query.
Thanks,
Roy
On 17.02.14 21:11, Jennifer wrote:
On Feb 17, 2014, at 10:17 AM, Roy Lyseng wrote:
please try filtering
On 31.03.11 12.52, Andrew Braithwaite wrote:
Hi,
Mysql select curdate() + interval 6 month - interval 6 month;
+-+
| curdate() + interval 6 month - interval 6 month |
+-+
| 2011-03-30
Hi!
I think that the query that you have proposed is the best possible for the
problem.
However, if there are duplicates in the orders table, then
HAVING COUNT(item_id) = 4
should be replaced with
HAVING COUNT(DISTINCT item_id) = 4
(I assume that you meant item_id and not org_id in the
Hi zhongtao,
thank you for reporting this bug. It has been filed as
http://bugs.mysql.com/bug.php?id=60279
Regards,
Roy
On 24.02.11 08.08, tanzhongt wrote:
create table t1(a int);
create table t2(b int);
PREPAREstmt FROM select sum(b) from t2 group by b having b in (select b from
Michael Widenius wrote:
Hi!
Peter == Peter Gulutzan peter.gulut...@sun.com writes:
Peter Hi all,
Peter On 01/15/2009 03:11 PM Peter Gulutzan wrote:
For a TIME or DATETIME or TIMESTAMP literal, one can use
'.' instead of ':' and one can skip leading fields. For example:
INSERT INTO t
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