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05.23.2008 at 05:53AM PDT, ID: 23427383
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9.7

How to UPDATE a set of records from the values in the same field of other records with matching values

Asked by megnin in SQL Query Syntax, MS SQL Server

Tags: ,

I have one table of "Applicants" that spans two years.  
Of last years "Applicants" about 50% were hired and have and employee ID ("EMPID" is not a key).  
This year's Applicants are in the same table.  I can tell which year is which by the 9 digit "keyApplicantID" (PK); this year's start with 2008xxxxx.

I need to update this year's applicants EMPID if we hired them last year so they will have the same EMPID this year that they did last year.  keyApplicantID will be different and unique for every record.  I can match last years record to this years on the SSN field (Social Security Number).

Table:  Applicants
PK:  keyApplicantID
Field1: LastName
Field2: FirstName
Field3: SSN
Field4: EMPID


UPDATE a
SET EMPID =
      (
       SELECT EMPID
       FROM Applicants AS b
       WHERE b.EMPID IS NOT NULL
       AND b.keyApplicantID < 200800000
       AND a.SSN = b.SSN
       )
FROM Applicants a
Where a.keyApplicantID > 200800000

/* The query above said, "Returned more than one value" and it was not allowed. */

/* The query below says "Incorrect syntax near 'AS'" */

UPDATE Applicants AS a
SET EMPID =
      (
       SELECT EMPID
       FROM Applicants AS b
       WHERE EMPID IS NOT NULL
       AND keyApplicantID < 200800000
       AND a.SSN = b.SSN
       )
Where keyApplicantID > 200800000

They both passed th SQL "Check" in SQL Server Enterprise Manager on SQL Server 2000, but returned the error upon execution.
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Keywords: How to UPDATE a set of records from …
Title
1 How to UPDATE a set of records from …
2 How to UPDATE a set of records from …
3 SSN Matching
4 Regex mod for SSN
5 Insert hyphens create SSN
6 SSN Formatting
 
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[+][-]05.23.2008 at 06:00AM PDT, ID: 21631647

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About this solution

Zones: SQL Query Syntax, MS SQL Server
Tags: SQL, SQL Server 2000
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Solution Provided By: chapmandew
Participating Experts: 1
Solution Grade: A
 
 
[+][-]05.23.2008 at 06:05AM PDT, ID: 21631688

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[+][-]05.23.2008 at 07:48AM PDT, ID: 21632602

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[+][-]05.23.2008 at 07:48AM PDT, ID: 21632605

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[+][-]05.23.2008 at 08:17AM PDT, ID: 21632897

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[+][-]05.23.2008 at 08:34AM PDT, ID: 21633074

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