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9.2

T-SQL join to remove rows based on date

Asked by vhpcomp in MS SQL Server, SQL Query Syntax

I have 3 tables. I want to remove rows from table A that have a value in a  DateEntered field before a specific date but  have no history records after that date in table B or C.  I have this select statement with inner join that returns only the rows in a that have a matching row in B or C prior to the date I want to remove:

SELECT * FROM MyTableA a
JOIN
(SELECT Firstname, Lastname, RegionID, MAX(DateEntered) AS MaxB FROM MyHistoryB
GROUP BY Lastname, Firstname,RegionID HAVING MAX(DateEntered) < '8/18/2006') b
ON a.firstname = b.firstname AND a.lastname = b.lastname
AND a.RegionID = b.RegionID
JOIN
(SELECT p_Firstname, p_Lastname, RegionID, MAX(DateEntered)AS MaxC FROM MyHistoryC
 GROUP BY p_Lastname, P_Firstname, RegionID HAVING MAX(DateEntered)< '8/18/2006') c
ON a.firstname =c.p_firstname AND a.lastname =c.p_lastname
AND a.RegionID = c.RegionID

I need to turn that around completely.  What I need is something that selects rows  with DateEntered in A of < 8/18/2006 and no rows in B or C with DateEntered  > 8/18/2006 joining on the three fields mentioned above.

Thanks!
[+][-]08/19/08 08:08 AM, ID: 22260469Expert Comment

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[+][-]08/19/08 10:04 AM, ID: 22261671Author Comment

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[+][-]08/19/08 10:11 AM, ID: 22261743Accepted Solution

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About this solution

Zones: MS SQL Server, SQL Query Syntax
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Solution Provided By: BrandonGalderisi
Participating Experts: 1
Solution Grade: A
 
 
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