Solved

MAX(UID) in MySQL

Posted on 2015-02-05
8
431 Views
Last Modified: 2015-02-05
I am trying to get the max unique identifier from a table
and I keep getting the first id not the last
Select MAX(UID) as id,UploadDate, Tooltype,SerialNumber,LocationID as 'locid' FROM Inventory_SerializedAssets Where LocationID in(" + otherlocations + ") AND ToolType in ('CO','PT','SS','BG','SP','TN') GROUP BY uid ORDER BY id

Open in new window

0
Comment
Question by:r3nder
[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
  • 5
  • 2
8 Comments
 
LVL 18

Assisted Solution

by:Simon
Simon earned 250 total points
ID: 40591622
You don't need to GROUP BY UID if you want the MAX value for it.
0
 
LVL 69

Accepted Solution

by:
Scott Pletcher earned 250 total points
ID: 40591651
I'm not an expert on MySQL, but I think this is what you need:


SELECT UID AS id, UploadDate, Tooltype, SerialNumber, LocationID AS 'locid'
FROM Inventory_SerializedAssets
WHERE LocationID in(" + otherlocations + ") AND
      ToolType in ('CO','PT','SS','BG','SP','TN')
ORDER BY UID DESC
LIMIT 1
0
 
LVL 6

Author Comment

by:r3nder
ID: 40591673
no, sorry that didnt work maybe if  I show you the data

UID | UploadDate              |LocID|SerialNumber|TOOLTYPE|QTY|NOTES                                                 |UserID
842 |2015-02-03 04:22:33|0        |1054                 |CO             |1     |Shipped from Dist 1, received by...|14
843 |2015-02-04 04:27:34|3        |1054                 |CO             |1     |Shipped from Dist 2, received by...|7 <---------This is the one I want
0
Optimize your web performance

What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI

 
LVL 6

Author Comment

by:r3nder
ID: 40591683
842 |2015-02-03 04:22:33|0        |1054                 |CO             |1     |Shipped from Dist 1, received by...|14
843 |2015-02-04 04:27:34|3        |1054                 |CO             |1     |Shipped from Dist 2, received by...|7 <---------This is the one I want
546 |2015-01-03 04:22:33|0        |1022                 |CO             |1     |Shipped from Dist 17, received by...|14
588|2015-01-04 04:27:34|3        |1022                 |CO             |1     |Shipped from Dist 2, received by...|7 <---------This is the one I want
etc.............
0
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 40591712
So rather than just the max UID, you need the max UID per SerialNumber?  Or by what criteria?
0
 
LVL 6

Author Comment

by:r3nder
ID: 40591731
I need the max(UID)  for each serialnumber that matches WHERE LocationID in(3,2,1,4) AND
      ToolType in ('CO','PT','SS','BG','SP','TN')
0
 
LVL 6

Author Comment

by:r3nder
ID: 40592107
I figured it out
SELECT UID AS id,
              UploadDate,
              Tooltype,
              SerialNumber,
              LocationID AS 'locid'
FROM Inventory_SerializedAssets
WHERE UID IN(SELECT MAX(UID) FROM Inventory_SerializedAssets GROUP BY SerialNumber)  
              AND LocationID in(" + otherlocations + ")
              AND ToolType in ('CO','PT','SS','BG','SP','TN') GROUP BY SerialNumber
0
 
LVL 6

Author Closing Comment

by:r3nder
ID: 40592110
Thanks for the help
0

Featured Post

Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

Question has a verified solution.

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

In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
This post looks at MongoDB and MySQL, and covers high-level MongoDB strengths, weaknesses, features, and uses from the perspective of an SQL user.
Via a live example, show how to shrink a transaction log file down to a reasonable size.
Viewers will learn how to use the INSERT statement to insert data into their tables. It will also introduce the NULL statement, to show them what happens when no value is giving for any given column.

628 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