#### Finding a row with the heigest/lowest value under specific conditions.

```Hello,

Goal:  Find the row with the highest of lowest value (can be with extra
conditions).

Example 1 find the row with the highest value.
Example 2 find the row with the highest value not exceeding 3.5.

What is the most elegant (???) way to do this ?
The examples are simple enough, but if they become part of a larger query,
the solutions become less elegant.

(In example 2 the condition is repeated which I consider less elegant.
In the second solution for example 2, the with is used this only works in

See below for an example

Thanks for your time and attention,
Ben Brugman

-- drop table TAB

CREATE TABLE TAB
(
AAA int NULL,
BBB varchar(10) NULL
)
insert into TAB values(1, 'one')
insert into TAB values(2, 'two')
insert into TAB values(3, 'three')
insert into TAB values(4, 'four')
insert into TAB values(5, 'five')
-- select * from TAB

-- Example 1 find the row with the highest value.
-----------------------------------------------------------------------
--
-- Select the highest value
--

SELECT '--' as [--],* FROM TAB WHERE
aaa in (select max(AAA) from tab)

-- results in
-- AAA BBB
---- ----------- ----------
-- 5 five

-- Example 2 find the row with the highest value not exceeding 3.5.
-----------------------------------------------------------------------
--
-- Select the highest value (use an extra condition)
--

SELECT '--' as [--],* FROM TAB WHERE
aaa < 3.5
AND
aaa in (select max(AAA) from tab WHERE aaa < 3.5)

-- results in
-- AAA BBB
---- ----------- ----------
-- 3 three

-----------------------------------------------------------------------
--
-- Select the highest value (use an extra condition)
-- Using a common_table_expression
--
;
WITH
MOST AS (select max(AAA) as plup from tab WHERE aaa < 3.5)
SELECT '--' as [--],* FROM tab where aaa in (select plup from most)

-- results in
-- AAA BBB
---- ----------- ----------
-- 3 three

```
 0
ben
7/15/2010 1:26:43 PM
sqlserver.server 1327 articles. 0 followers.

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```ben brugman (ben@niethier.nl) writes:
> Goal:  Find the row with the highest of lowest value (can be with extra
> conditions).
>
> Example 1 find the row with the highest value.
> Example 2 find the row with the highest value not exceeding 3.5.
>
> What is the most elegant (???) way to do this ?

Probably with the row_number unfunction:

WITH numbered AS (
SELECT ..., rowno = row_number () OVER (ORDER BY val DESC)
FROM   tbl
)
SELECT ...
FROM   numbered
WHERE  rowno = 1

--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se

Links for SQL Server Books Online:
SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx
SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx
SQL 2000: http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx

```
 0
Erland
7/15/2010 9:43:41 PM

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