Update column that starts with value % ?

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name is a list of items having first name of students . I need to update student column that starts with elements in name .

list<string> name = {"william","tom", " harry",......}

student column values are "williamt smith", "tomhardy" , harry philip"...like so .

how to update column that starts with some values ..

What I have tried:

foreach (var i in name)
{
cmd.CommandText = "update students SET Progress = 'Good' where Student like '" + i% + "' ";
cmd.ExecuteNonQuery();
}

Posted 28-Jun-21 1:51am

Member 15212425

Updated 28-Jun-21 2:59am

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Richard MacCutchan 28-Jun-21 8:03am

What happens if you have more than one person with the same forename?

Member 15212425 28-Jun-21 8:15am

yes that one will also get updated . when i'm doing Student like '" + i% + "' ";
itz not working . how to code % on that ??

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CHill60 · Answer 1 · 2021-06-28T02:59:00

The wildcard character % has to be part of the command string. i.e.

C#

cmd.CommandText = "update students SET Progress = 'Good' where Student like '" + i + "%' ";

However, you should be using a Parameterised query here

C#

cmd.CommandText = "update students SET Progress = 'Good' where Student like @name";
string searchName = string.Format("{0}%",i);
cmd.Parameters.Add(new SqlParameter("@name", searchName));
cmd.ExecuteNonQuery();

Also note the comment from Richard - using forenames like this is not a good idea