Need to store multiple values seperated by comma(,) in single column.

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Hi
I'm developing a website Which contains profile of n no of peoples.
Here what the user will do is, he/she want to log in to view the peoples details.Only register user have the rights to view the details and he can view n no peoples details on one time login.
when ever the user click on the each profile its id should store in database.

In a database i have field called profileid.
1st time when user click on the profile means its id is getting stored in profileid.

What i want is when the same user click another profile id ,then it should store in same field with previous one with comma(,).

Eg:

profieid
20
20,15
20,15,10

This is my code:

C#

string Name = (string)(Session["Name"]);
        string time = (string)(Session["Time"]);
        string sql = ("UPDATE  History set RegID_UserProfile='" + Request.QueryString["id"].ToString() + "' WHERE UserName='" + Name + "' and LoginTime='" + time + "'");
        SqlCommand cmd7 = new SqlCommand(sql, con);
        int temp = cmd7.ExecuteNonQuery();
        if (temp == 1)
        {
            //aa
        }
        con.Close();

Likewise it should store..

Anyone have the idea to achieve this???

Posted 10-Mar-14 3:38am

Appdev(Icode)

Updated 10-Mar-14 3:41am

v4

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ZurdoDev 10-Mar-14 9:43am

UPDATE History SET REgUD_UserProfile = RegID_UserProfile + ...

This way you add on to what is already there.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Mar-14 10:01am

Just put a break point and see what is the dynamic query formed by code. Take that and execute it directly on Database. See if it is correct or not.

2 solutions

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Peter Leow · Answer 1 · 2014-03-10T04:00:00

No, do not do it this way. It violates the first normal form[^] of relational database design. Every new profileid should go into a new row of its own, not concatenating with existing value. You should have 2 tables, say a users table and another profiles table (one-to-many relationship) like this:
Table: users
user_id (primary key)
user_name
[other fields]

Table: profiles
user_id (primary key and foreign key to user_id of users table)
profile_id (primary key)
[other fields]

When a user clicks on a profile, the user_id and the profile_id and other related information will be inserted as a new row once in the profiles table. The composite primary key of user_id and profile_id will ensures that no same pair of these values got inserted twice.

PJ003 · Answer 2 · 2014-03-10T18:44:00

Solution 2

SQL

SELECT DISTINCT [Col1], [Col2],
[Col3] = STUFF ((SELECT ', ' + [Col3] FROM tbl_tempTable b
WHERE b.[Col1] = a.[Col1] FOR XML PATH('')), 1,2,'') 
FROM tbl_tempTable a

END

Posted 10-Mar-14 18:44pm

PJ003

Comments

[no name] 11-Mar-14 0:47am

Hi i just want to update the value in a single table called history and i dont want to view those thing.