Make oracle database case insensitive

Hi All,
I am using oracle 10g EE as my back end database and front end is in C# .NET. I want to make my oracle database to perform any comparison case insensitively. I searched on the net and found several ways to achieve that
1. using upper function in procedures - can't afford
2. function index - can't afford
3. setting the session parameters
ALTER SESSION SET NLS_COMP=ANSI;
ALTER SESSION SET NLS_SORT=BINARY_CI;
The 3rd looks promising and can save lot of time. I have several question
1. Is there any way I can set these parameters from .NET?
2. Is there any way I can set once and will make only my database case insensitive?
any link, reference is highly appreciated.
Thanks,

user10768079 wrote:
Thanks for your mail.
I want to apply these settings to my oracle database only. It should not affect other oracle database that exist with my db.
Thanks,It would make sense to issue "ALTER SESSION" statements during logon process from the .NET code instead of changing the entire database - which might affect other users. Judging by the way you have written this, I feel you are referring to a schema rather than database.
.NET surely has the capability to run "ALTER SESSION" statements.

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5             select 'max' name from dual union all
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7             select 'Sam' name from dual
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3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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9 select name
10    from t
11    where name = 'max'
12 /
NAM
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2 /
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SQL> with t as (
2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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10    from t
11    order by name
12 /
NAM
Joe
joe
max
Max
Sam
sam
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3             select 'sam' name from dual union all
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5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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10    from t
11    where name = 'max'
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NAM
max
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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10    from t
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max
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3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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10    from t
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2 /
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3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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9 select name
10    from t
11    order by name
12 /
NAM
Joe
joe
max
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Sam
sam
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3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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11    where name = 'max'
12 /
NAM
Max
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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10    from t
11    where name like 'm%'
12 /
NAM
max
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NAM
Max
max
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
8            )
9 select distinct name
10    from t
11 /
NAM
sam
Joe
joe
max
Sam
Max
6 rows selected.
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2 /
Session altered.
SQL> alter session set nls_comp=linguistic
2 /
Session altered.
SQL> with t as (
2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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9 select name
10    from t
11    order by name
12 /
NAM
Joe
joe
max
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Sam
sam
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
8            )
9 select name
10    from t
11    where name = 'max'
12 /
NAM
Max
max
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
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7             select 'Sam' name from dual
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10    from t
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2 select 'max' name from dual
3 /
NAM
Max
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2             select 'Max' name from dual union all
3             select 'sam' name from dual union all
4             select 'Joe' name from dual union all
5             select 'max' name from dual union all
6             select 'joe' name from dual union all
7             select 'Sam' name from dual
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9 select distinct name
10    from t
11 /
NAM
sam
Joe
joe
max
Sam
Max
6 rows selected.
SQL> However even LINGUISTIC does not work with:
• CLOB or NCLOB data types
• Object data types
• Table partitions
• Index-organized tables
SY.

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+-----------------+----------------+------+-----+----------------+-------+
| code            | char(3)        |      | PRI |                |       |
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7 rows in set (0.00 sec)
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One of the problem is that oracle's column names are
case insensitive, whereas CODE in mySql is different from code (see example posted below).I doubt that.
SQL standards are rather specific that columns names are case insensitive unless quoted identifiers are used. And presumably you are doing that.
What you are seeing is a difference in drivers not databases.
I would guess that the only way to change the behaviour is to modify your code. If you uppercase everything it should work. Or you could use positional rather than named column extraction.

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