How can a more efficient SQL statement be used in PHP to update records in one table based on conditions in another table?

To update records in one table based on conditions in another table efficiently, you can use a SQL statement with a JOIN clause to connect the two tables and apply the conditions. This way, you can update the records in one table based on the matching criteria from another table in a single query. 

<?php
// Establish a connection to the database
$connection = new mysqli("localhost", "username", "password", "database");

// SQL query to update records in table1 based on conditions in table2
$sql = "UPDATE table1
        JOIN table2 ON table1.column = table2.column
        SET table1.column = 'new_value'
        WHERE table2.condition = 'some_condition'";

// Execute the SQL query
$connection->query($sql);

// Close the database connection
$connection->close();
?>

Keywords

PHP SQL statement update records conditions another table

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