Update or insert from csv into sql server - sql-server

Question

I have a CSV file containing user info, say
first_name;last_name;user_id;full_name
column separator is ;, row terminator is \n.
What I need to do is to insert or update into users table. Unique key is user_id: if record with this user_id already exists, I need to update, if it doesn't I need to insert.
However, there are some problems that prevent me from using management studio data-import or bulk insert.
First, there are more fields in the users table (not just 4) and the order of columns in csv file does not correspond to the order of columns in the table. So I need to be able to specify which column from the file goes to which column in the table.
Secondly, some additional fields need to be filled. For example, users.email = users.user_id. Here is another obstacle - though for a newly inserted row users.email = users.user_id it is possible that users.email will change in the future, so I cannot just insert user_id and then run update [users] set [email] = [user_id].

Answer 1

Use fgetcsv
Example with two colonne :
<?php
$row = 0;
$update = "";
//separator of column
$separator = ";";
//creates two variables containing the index columns to read / modify
$idx_nom = 0;
$idx_rubrique = 1;
//Open file writing
if (($handle = fopen("test.csv", "r")) !== FALSE)
{
//we travel the file line by line, storing the data in a table
while (($data = fgetcsv($handle, 1000, ";")) !== FALSE)
{
//can not control that the second line if the first contains the column headers
if ($row != 0)
{
//conditions of one column
if (stristr($data[$idx_nom], 'chemise'))
{
$data[$idx_rubrique] = 1;
}
else if (stristr($data[$idx_nom], 'costume'))
{
$data[$idx_rubrique] = 2;
}
else if (stristr($data[$idx_nom], 'cravate'))
{
$data[$idx_rubrique] = 3;
}
}
$update .= implode($separator,$data)."\r\n";
$row++;
}
fclose($handle);
}
//update from csv
$ouvre=fopen("test.csv","w+");
fwrite($ouvre,$update);
fclose($ouvre);
?>