Stefanie posted

Putting another query inside the where clause mysql and php

shyam
answered Apr 28 '23 00:00

You can use a subquery inside the WHERE clause of a MySQL query to filter the results based on the output of another query. Here's an example using PHP:


$subquery = "SELECT id FROM other_table WHERE column1 = 'value'";
$query = "SELECT * FROM my_table WHERE id IN ($subquery)";

$result = mysqli_query($connection, $query);

In this example, $subquery is the subquery that selects the id values from other_table where column1 is equal to 'value'. The $query variable uses the IN operator to filter the results of my_table based on the id values returned by the subquery.

Note that in order to use a subquery in the WHERE clause, the subquery must return a single column with one or more rows. Also, make sure to properly escape and sanitize any user input used in the subquery to prevent SQL injection attacks

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Stefanie posted

Putting another query inside the where clause mysql and php

shyam answered Apr 28 '23 00:00

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shyam
answered Apr 28 '23 00:00