How to read and update table row by row sql and php? - php

Question

I have a database where I want to read a table row by row and then for each row I want to update a cell. I have written the below code but is there a better way of doing this ? Better way I mean it takes less time than my code.
Here is my code :
$List = 'some text...';
$SQL = "SELECT * FROM TABLE";
$res = mysqli_query($database, $SQL);
while($row = mysqli_fetch_assoc($res)){
if(strpos($List,$row['name']) !== false){
mysqli_query($database, "UPDATE TABLE SET `yes`=1 WHERE name='".$row['name']."'");
}else{
mysqli_query($database, "UPDATE TA SET `yes`=0 WHERE name='".$row['name']."'");
}
}

Answer 1

That approach is not the best one, the idea of SQL is to manage and be able to do that in a more efficient way. Instead of iterating each row and executing total rows +1 queries you can do only 2 queries and update the information.
for Example:
-- Update all to 0
UPDATE TABLE SET `yes`=0 ;
-- Update the one on the list to 1
UPDATE TABLE SET `yes`=1 WHERE name in ('value1','value2','value3');
This approach could save you a lot of execution time and be more efficient event on very large datasets.

Answer 2

i have 2 solution here
Solution 1 :
Copy the table and perform the update and rename the orginal table and also rename copy 1 table to original 1
table_1 copy to table_2
perform the operation on table_2
then rename table_1 to bkp_table_1
then rename table_2 to table_1
Solution 2
with the user select insert the data in new table which you what to update.