Bulk insert from multiple data sources using PDO - php

Question

I am trying to insert rows into a MySQL table using PHP/PDO, from two sources, namely :
Another Table (Same database)
PHP
The table I am filling looks like this :
Table Name : data_sink
+-------+-----------+--------------+-----------+
| ID | data1 | data2 | data3 |
+-------+-----------+--------------+-----------+
| 1 | text_1 | aa | 8 |
| 2 | text_2 | bb | 8 |
| 3 | text_3 | cc | 8 |
| 4 | text_4 | dd | 8 |
| 5 | text_5 | ee | 8 |
| 6 | text_6 | ff | 8 |
+-------+-----------+--------------+-----------+
In this, data1 and data2 are taken from another table, however data3 comes from the PHP code. I used the following query to get data from just the table :
$insert_rows = $db->prepare("INSERT INTO data_sink (data1, data2)
SELECT username, usergroup FROM data_origins WHERE <condition>");
I am unsure of how to add data3 into this query. I have found a workaround for this by adding another column to my origin table, and filling all rows with the value "replaceme", and then running the query as follows :
$insert_rows = $db->prepare("INSERT INTO data_sink (data1, data2, data3)
SELECT username, usergroup, temp_value FROM data_origins WHERE <condition>");
I then run an additional query, updating the table wherever data3 is set to "replaceme"
$update_rows = $db->prepare("UPDATE data_sink SET data3 = :data3
WHERE data3 = 'replaceme'");
Is there a single step method of solving this problem, to combine inputs from MySQL and PHP? [NOTE : For every batch of inserts, all rows share a common value for data3]

Answer 1

Could be as simple as
$insert_rows = $db->prepare("INSERT INTO data_sink (data1, data2, data3)
SELECT username, usergroup, ? FROM data_origins WHERE <condition>");
$insert_rows->bindParam(1, $data3);
$insert_rows->execute();
This of course assumes that your $data3 is the same for all rows that are being inserted. It's also possible to do a simple arithmatic operation or function call to ensure that each row gets a different value based on $data3