mysql update from file insert if exist else update - php

Question

I have a mysql table (my_table) which have 3 columns (Name, Age, Place). I have a new text file (data.txt tab separated data file) which have have 2 columns (Name and Place). I want to insert information from file "data.txt" into my_table with the condition if Name is same (in mysql table and in text file "data.txt") update row (insert Place value in 3rd column) otherwise create new row (in which Age will be NULL).
if NAME_my_tabe== Name_data.txt --> update this row (do Place_my_tabe = Place_data.txt)
if Name_data.txt not present in my_tabe --> create new row (do Name_my_table=Name_data.txt, Age_my_table=NULL, Place_my_tabe = Place_data.txt)
How to do this in mysql ??? (I want to insert values from text file)

Answer 1

First of all, make sure your table contains the following:
UNIQUE on Name
Age is NULLABLE
The following query will do what you need:
INSERT INTO my_table SET name = 'Name', place = 'Place'
ON DUPLICATE KEY UPDATE place = 'New Place'
With the code to read your file, you could use:
$file = new SplFileObject('data.txt');
while($file->eof() === true) {
$line = $file->fgets();
$data = explode("\t", $line);
// execute query:
$query = sprintf(
"INSERT INTO my_table SET name = '%1$s', place = '%2$s' ON DUPLICATE KEY UPDATE place = '%2$s'",
$data[0], // escape this
$data[1] // escape this
);
}
Note that you will need to execute that query using your mysql client library.