how to get the max value from a string.....

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hi all...........

thanks n advance......

In my table i have a column with value of nvarchar data type value like 'A1','A2','A3' simultanously incremented.....

my need is how to get the max from that column value.......
(eg)
colname
A1
A2
A3
A4
A11
A12
A13

i have the value likethis i have to get the max value as A12 instead am getting the value as A4 is max...

i use the query as

select max(colname) from the table....

what i have to do to get my max value as A13.

pls guide me....

thanks in advance...
with warm regards.......
Cva.......

Posted 27-Sep-11 1:46am

MemberCva

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2 solutions

Solution 1

If number of alphabets in the column is fixed then you can use this query

select max(substring(columnname,2(no.of alphabets+1),len(columnname)-1)) from tablename

with this query you will get max integer that means 13
and in code while inserting into database you can attach that fixed alphabet to the column and then insert.

I hope you understood what i am saying.
if i am not clear feel free to ask.

Posted 27-Sep-11 1:50am

P.Salini

Updated 27-Sep-11 1:56am

v4

Comments

MemberCva 28-Sep-11 0:37am

thanks yar....
while executing my query igot he result incorrect syntax near '('.....
my query is
select MAX ( substring (ID,2(2+1),len(ID)-1) ) from Table1

2+1 here 2 mentions the no of alphabets am using in that column, AB is my alphabet in that column.....

thanks in advance.....

with warm regards....
Cva.....

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sachin10d · Accepted Answer · 2011-09-27T02:32:00

Solution 2

Check this out

SQL

select max(convert(int,replace(a,'A',''))) from
(select 'A1' a
union all select 'A2'
union all select 'A3'
union all select 'A4'
union all select 'A11'
union all select 'A12'
union all select 'A13') tmpTable

Posted 27-Sep-11 2:32am

sachin10d

Comments

MemberCva 28-Sep-11 0:32am

thanks sachin....

i got the result by ur query but my need is to get the result dynamically.....

thanks in advance.....
with warm regards...
Cva....