How to Efficiently Implement a Subquery with WHERE IN in Laravel?

Using Laravel to Implement a Subquery with WHERE IN Clause

You have requested a method for executing a specific SQL query that utilizes a subquery with a WHERE IN clause in the Laravel framework. Let's explore how to achieve this:

Laravel Query Builder

The Laravel Query Builder provides an elegant syntax for constructing SQL queries. To execute the provided query, you can use the following code:

$productIds = ProductCategory::whereIn('category_id', ['223', '15'])->pluck('product_id');
$products = Product::where('active', 1)->whereIn('id', $productIds)->get();

Closure-Based Subquery

Alternatively, you can use a closure-based subquery:

Products::whereIn('id', function($query){
    $query->select('product_id')
    ->from('product_category')
    ->whereIn('category_id', ['223', '15'])
    ->where('active', 1);
})
->get();

Explanation:

• The first approach fetches the product IDs matching the subquery and uses them in a subsequent query to retrieve relevant product information, ensuring acceptable performance.
• The second approach constructs the subquery dynamically, which is then combined with the main query using the whereIn method.

Performance Considerations:

You indicate that performance is a concern, and using a subquery is indeed appropriate for efficiency. The closure-based method is slightly more complex but may offer some performance benefits.

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