Connect your existing build, deployment, management, monitoring, and collaboration platforms. From Puppet to Chef, HipChat to Slack, ServiceNow to JIRA, Splunk to New Relic and beyond, hand off data between systems to engage the right people.
Connect with xMatters.
Course Of The Month
4 days, 8 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
mysql update and get max(uploadDatetime)
Posted on 2015-01-05
I have a query and I want to get the max datetime for the update does anyone know how I can do this
DROP Table if exists TEMP_PARTS;
CREATE TABLE TEMP_PARTS(SELECT il.PartDesc as 'Tool Type', il.PartNumber, ip.Quantity, Cast('2012:01:01 12:00:00 AM'as DateTime) AS 'InsertDate', ip.InventoryListID, ip.locationID
FROM Inventory_Parts as ip
JOIN Inventory_InventoryList as il ON il.UID = ip.InventoryListID
WHERE LocationID = 1 and isVisible = 1);
UPDATE TEMP_PARTS tp
JOIN Inventory_InventoryList as il ON il.UID = tp.InventoryListID
JOIN Inventory_PartsHistory ph ON ph.InventoryListID = il.UID
//////I want tp.InsertDate = MAX(ph.InsertDate) WHERE/////////////////////////////////
Set tp.InsertDate = ph.InsertDate WHERE tp.PartNumber = il.PartNumber AND tp.LocationID = ph.locationID);
SELECT * FROM TEMP_PARTS
[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 Comments
From what I can make out from your query (without table definitions) it looks like the UPDATE can be simplified to avoid the joins and just use a subquery to get the max(insertdate) for that item.
UPDATE TEMP_PARTS tp
Set tp.InsertDate = (select max(InsertDate) from inventory_PartsHistory WHERE InventoryListID = tp.InventoryListID AND locationID=tp.LocationID);
Even if you DO need the join to Inventory_InventoryList, you'd still use a subquery to get the max(insertdate) from the Inventory_PartsHistory table.
UPDATE TEMP_PARTS tp
Set tp.InsertDate = (select max(InsertDate) from inventory_PartsHistory WHERE InventoryListID = tp.InventoryListID AND locationID=tp.LocationID);
Even if you DO need the join to Inventory_InventoryList, you'd still use a subquery to get the max(insertdate) from the Inventory_PartsHistory table.
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied?
You can use SQL Server Initialize from Backup…
In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
Via a live example, show how to set up a backup for SQL Server using a Maintenance Plan and how to schedule the job into SQL Server Agent.
Via a live example, show how to setup several different housekeeping processes for a SQL Server.
Suggested Courses
Course of the Month4 days, 8 hours left to enroll
690 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.