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basic sql query

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rahulsh
Starting Member

1 Post

Posted - 2012-02-18 : 04:31:21

Hi All,
I have a table of three columns containing name,version and data
.There can be multiple tuples of same name but with different version. From each group of same names, I want to delete those tuples for which the version is smallest.Ex
NAME VERSION DATA
A 1 nething
A 2 nething
B 3 nething
B 3 nething
B 4 nething
after operation, the tuples left in the table must be
A 2 nething
B 4 nething
Please help me out in this query.

robvolk
Most Valuable Yak

15732 Posts

Posted - 2012-02-18 : 06:26:22

SELECT NAME, MAX(VERSION) Ver, DATA
INTO #a
FROM myTable
GROUP BY NAME, DATA

TRUNCATE TABLE myTable

INSERT myTable(NAME, VERSION, DATA) SELECT NAME, Ver, DATA FROM #a

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-18 : 15:33:56

will data be same value always?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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