troubleshooting Question

Multi-table UPDATE with a CASE statement

Avatar of mpdillon
mpdillon asked on
Microsoft SQL Server
6 Comments1 Solution661 ViewsLast Modified:
I need to update one table with the a value from one of two tables depending on a case statement. The table to be updated is the Hdr table. I want to update a field called Fld in the Hdr table. When the value of the ShipToNo in the Hdr table is blank then Fld is equal to the Zip from the CusFil. The Hdr table and the CusFile Table are Joined by Hdr.CusNo = CusFil.CusNo. When the ShipToNo in the Hdr is not blank then Hdr.Fld is equalt to the Zip from the ShipFil. The ShipFil and Hdr tables are joined by Hdr.ShipToNo = ShipFil.ShipToNo.
Here is my attempt to start the update statement.

Update Hdr Set Hdr.Fld =  (Case When Hdr.ShipToNo = '' Then ?Cusfil.Zip else ?ShipFil.Zip end)
Your help in filling in the ?'s would be greatly appreciated.
My guess
?CusFil.CusNo = Select Zip From CusFil where Hdr.CusNo = CusFil.Cusno

?ShipFil.ShipToNo = Select Zip From ShipFil where Hdr.ShipToNo = ShipFil.ShipToNo


Our community of experts have been thoroughly vetted for their expertise and industry experience.

Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 6 Comments.
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>


Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 6 Comments.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004