[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.8

UPDATE from a SELECT

Asked by pmengal in MS SQL Server

Tags: from, update

Hi,

I want to create T-SQL stored procedure that will do the following task :

I have 2 tables. A and B. A and B have 4 fields in common. The fields are named F1, F2, F3 and F4. B is the reference table that contain an ID (say K1 as the field name) and the 4 fields (Fx). A is the data table that contains both the foreign key K1 and also the fields (Fx). So basically, I can do a select on table A and get by using relatinal data the related value of F1, F2, F3 and F4 using the foreign key of A.K1 and primary key of B.K1. But B is so big (millions records), I want to remove the relational for specific queries that has to be very fast and a so select on one table only (A). So periodically, I want to execute a stored procedure that will take the data from B and put them in A using both a SELECT (to get the related data) and an UPDATE (to update the table A).

Look this pseudo code, I want this in TSQL

ARECORDSTOBEUPDATED = SELECT ALL RECORDS FROM A THAT DO NOT CONTAIN F1 VALUE (this means we did not normalized it yet)

( FOREACH MAINDATAROW IN ARECORDSTOBEUPDATED DO:

  REFERENCEROW =  SELECT TOP 1 FROM B WHERE B.K1 = MAINDATAROW .K1

 UPDATE MAINDATAROW WITH REFERENCEROW DATA (F1, F2, F3, F4)
)

This is quite simple, but I really don't know how to achieve this.

Thanks a lot in advance.
[+][-]11/21/06 08:05 AM, ID: 17988120Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zone: MS SQL Server
Tags: from, update
Sign Up Now!
Solution Provided By: angelIII
Participating Experts: 1
Solution Grade: A
 
 
Loading Advertisement...
20091118-EE-VQP-93