Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

MySQL maximum date before a given date

Posted on 2013-01-03
5
Medium Priority
?
205 Views
Last Modified: 2014-12-20
I have a table that has a series of dates along with an ID:
MY_ID    MY_DATE
A             3/6/1987 12:00:00 AM
A            4/1/1988 12:00:00 AM
A            4/28/1989 12:00:00 AM
B            3/6/1987 12:00:00 AM
B           4/1/1988 12:00:00 AM

I would like to find the maximum A that is before say 04/27/1988.
This does not work, and I cant figure out why:

Select max(My_date) from Mytable
where MY_ID = 'A'
and My_date < str_to_date('04/27/1988')
group by MY_ID

it always just gives me the max() record
0
Comment
Question by:GNOVAK
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
5 Comments
 
LVL 41

Expert Comment

by:Sharath
ID: 38742339
I did not see any issue. What is the date are you getting with your query?
0
 

Author Comment

by:GNOVAK
ID: 38744260
I'm trying to get the second record as presented above:
A            4/1/1988 12:00:00 AM
and I keep getting :
A            4/28/1989 12:00:00 AM

almost like the Max() takes precedence
0
 

Accepted Solution

by:
GNOVAK earned 0 total points
ID: 38752790
Wierd.
If I do the following, I get the right date:

Select max(My_date) from Mytable
where MY_ID = 'A'
and My_date < '1988-27-04')

However if my data looks like this:
MY_ID    MY_DATE                             PRICE
A             3/6/1987 12:00:00 AM       1
A            4/1/1988 12:00:00 AM         2
A            4/28/1989 12:00:00 AM       3
B            3/6/1987 12:00:00 AM         5
B           4/1/1988 12:00:00 AM          6

and I query  using:
Select max(My_date), PRICE from Mytable
where MY_ID = 'A'
and My_date < '1988-27-04')

I get the right date (4/1/88) but get the first price (1)
How do I query to get the price corresponding to the date retrieved?
0

Featured Post

Enroll in October's Free Course of the Month

Do you work with and analyze data? Enroll in October's Course of the Month for 7+ hours of SQL training, allowing you to quickly and efficiently store or retrieve data. It's free for Premium Members, Team Accounts, and Qualified Experts!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article shows the steps required to install WordPress on Azure. Web Apps, Mobile Apps, API Apps, or Functions, in Azure all these run in an App Service plan. WordPress is no exception and requires an App Service Plan and Database to install
Containers like Docker and Rocket are getting more popular every day. In my conversations with customers, they consistently ask what containers are and how they can use them in their environment. If you’re as curious as most people, read on. . .
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

610 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question