Question

I’m wanting to set the current time i my database

My column is a “datetime” format

My insert SQL is as follows.

// Set last login
DateTime date = DateTime.Now;
string insertSQLDet = "INSERT INTO [dbo].[user] (last_login) VALUES (" + date + ") WHERE user_id=" + user_id;

But I get an error saying I have incorrect near “WHERE”. Can anyone see what’s wrong?

Answer 1

My guess! you want to update the last_login field so use the UPDATE statement and always use parameters.

DateTime date = DateTime.Now;
string sql = "UPDATE [dbo].[user] SET last_login=@date WHERE user_id=@userid";
using(SqlCommand cmd=new SqlCommand(sql,conn))
  {
    cmd.Parameters.Add("@date",SqlDbType.DateTime).Value=date;
    cmd.Parameters.Add("@userid",SqlDbType.VarChar,20).Vaule=user_id;
    conn.Open();
    cmd.ExecuteNonQuery();
    conn.Close();
   }