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update from multiple tables


update from multiple tables

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parthmeister
parthmeister
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Hi Folks,

i am using 4 tables company, users, ARSAP, ARCUS to update a column in company table.

the tsql i am using is below.

UPDATE c
SET c.comp_primaryuserid = u.user_userid
FROM Company c, Users u
LEFT JOIN SAMINC.dbo.ARSAP z on z.NAMEEMPL = 'u.user_firstname u.user_lastname'
LEFT JOIN SAMINC.dbo.ARCUS y on z.CODESLSP = y.CODESLSP1 WHERE y.IDCUST = c.comp_companyid

the validation "LEFT JOIN SAMINC.dbo.ARSAP z on z.NAMEEMPL = 'u.user_firstname u.user_lastname'" is not working though the sql is correct, there is no relation between ARSAP table and users table.

I just want to match the firstname lastname from column NAMEEMPL (table ARSAP) to users table user_firstname user_lastname.

NAMEEMPL is char(60) and have data for e.g. Bill Bhassion
user_firstname nvarchar(20) and user_lastname nvarchar(40) are two different fields for e.g. user_firstname = Bill user_lastname = Bhassion
i am stuck at this point and i cant update c.comp_primaryuserid = u.user_userid to fix this up.

any ideas to help?

regards,
parth
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Group: General Forum Members
Points: 6976 Visits: 8839
did you try:

select c.*, u.*
FROM Company c
INNER JOIN SAMINC.dbo.ARCUS y
on y.IDCUST = c.comp_companyid
inner JOIN SAMINC.dbo.ARSAP z
on z.CODESLSP = y.CODESLSP1
inner join Users u
on u.user_firstname + ' ' + u.user_lastname = z.NAMEEMPL



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parthmeister (10/2/2013)
Hi Folks,

i am using 4 tables company, users, ARSAP, ARCUS to update a column in company table.

the tsql i am using is below.

UPDATE c
SET c.comp_primaryuserid = u.user_userid
FROM Company c, Users u
LEFT JOIN SAMINC.dbo.ARSAP z on z.NAMEEMPL = 'u.user_firstname u.user_lastname'
LEFT JOIN SAMINC.dbo.ARCUS y on z.CODESLSP = y.CODESLSP1 WHERE y.IDCUST = c.comp_companyid

the validation "LEFT JOIN SAMINC.dbo.ARSAP z on z.NAMEEMPL = 'u.user_firstname u.user_lastname'" is not working though the sql is correct, there is no relation between ARSAP table and users table.

I just want to match the firstname lastname from column NAMEEMPL (table ARSAP) to users table user_firstname user_lastname.

NAMEEMPL is char(60) and have data for e.g. Bill Bhassion
user_firstname nvarchar(20) and user_lastname nvarchar(40) are two different fields for e.g. user_firstname = Bill user_lastname = Bhassion
i am stuck at this point and i cant update c.comp_primaryuserid = u.user_userid to fix this up.

any ideas to help?

regards,
parth


Your joins need a little work - try this:
UPDATE c 
SET c.comp_primaryuserid = u.user_userid
FROM Company c
INNER JOIN SAMINC.dbo.ARCUS y
ON y.IDCUST = c.comp_companyid
INNER JOIN SAMINC.dbo.ARSAP z
ON z.CODESLSP = y.CODESLSP1
INNER JOIN Users u
ON z.NAMEEMPL = u.user_firstname + ' ' + u.user_lastname



Before running it as an UPDATE, check the statement as a SELECT using a selection of columns from the tables.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
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