求MySQL查询对应的Laravel 5.2实现方案（已完成子查询）

Hey there! Since you've already got the subquery portion of your Laravel query conversion sorted, let's work through the rest together. To give you precise, actionable advice tailored to your use case, could you share a couple of key details first:

• The full original MySQL query you're aiming to convert
• The Laravel 5.2 code you've already written for the subquery

To give you a quick sense of how this might come together, let's use a hypothetical example. Suppose your original MySQL query looks like this:

SELECT * FROM products
WHERE price > (
    SELECT AVG(price) FROM products WHERE category_id = 1
)

If your completed subquery in Laravel is:

$avgPriceSubquery = DB::table('products')
    ->select(DB::raw('AVG(price)'))
    ->where('category_id', 1);

You could integrate it into the main query in Laravel 5.2 like this:

$products = DB::table('products')
    ->where('price', '>', DB::raw("({$avgPriceSubquery->toSql()})"))
    ->mergeBindings($avgPriceSubquery)
    ->get();

Or if your subquery is meant to be used in an EXISTS clause, here's how you could structure it:

$products = DB::table('products')
    ->whereExists(function ($query) {
        $query->select(DB::raw(1))
              ->from('product_reviews')
              ->whereRaw('product_reviews.product_id = products.id')
              ->where('rating', '>=', 4);
    })
    ->get();

Laravel 5.2 supports methods like whereExists, mergeBindings, and even joinSub for subquery joins, so we can match almost any MySQL query structure once we have your specific details.

Once you share your actual original query and existing subquery code, I can help you refine the exact syntax to get everything working smoothly!

内容的提问来源于stack exchange，提问作者Anamik Adhikary