Solved

update from select mysql

Posted on 2015-01-12
7
361 Views
Last Modified: 2015-01-13
I am trying to update a table and set the quantity from a temp table
UPDATE `Inventory_Parts` SET `Quantity`= (SELECT Qty FROM Temp_Counts tc
JOIN Inventory_Parts as ip ON ip.InventoryListID = tc.UID and LocationID = 0)

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
  • 4
  • 2
7 Comments
 
LVL 13

Accepted Solution

by:
Mark Bullock earned 500 total points
ID: 40545706
Remove the apostrophes around Inventory_Parts and Quantity.

I would not do a join in the subquery. Instead use WHERE InventoryListID = tc.UID
0
 
LVL 65

Expert Comment

by:Jim Horn
ID: 40545895
So this is all fine and dandy if the subquery returns only one row.  Anything larger than that and the code will throw an error.   So, added SUM..
UPDATE Inventory_Parts
SET Quantity= (
	SELECT SUM(Qty) 
	FROM Temp_Counts tc
	   JOIN Inventory_Parts ip ON ip.InventoryListID = tc.UID and LocationID = 0)

Open in new window


Also, SQL Server does not require the single quote marks ', not sure if MySQL uses that.
0
 
LVL 6

Author Comment

by:r3nder
ID: 40546610
@Jim MySQL uses the single quote but in any event the error I am getting is "You can't specify target table 'Inventory_Parts' for update in FROM clause" on both your query and mine
0
NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

 
LVL 6

Author Comment

by:r3nder
ID: 40546687
This seems to have updated everything to zero if it didn't meet the criteria
UPDATE Inventory_Parts
SET Quantity= (
	SELECT Qty 
	FROM Temp_Counts tc
	   WHERE InventoryListID = tc.UID  and LocationID = 0)

Open in new window

0
 
LVL 13

Expert Comment

by:Mark Bullock
ID: 40546759
Add a WHERE clause with the criteria to the UPDATE to avoid setting to zero.
0
 
LVL 6

Author Comment

by:r3nder
ID: 40546776
Like this
UPDATE Inventory_Parts
SET Quantity= (
	SELECT Qty 
	FROM Temp_Counts tc
	   WHERE InventoryListID = tc.UID) WHERE LocationID = 0

Open in new window

0
 
LVL 6

Author Closing Comment

by:r3nder
ID: 40546810
Thank  you sir!
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

This article describes how to use the timestamp of existing data in a database to allow Tableau to calculate the prior work day instead of relying on case statements or if statements to calculate the days of the week.
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
Via a live example, show how to setup several different housekeeping processes for a SQL Server.
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

749 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