我是否正确地为GROUP_CONCAT和CONCAT使用ascii控制字符

Question

当我使用PHP爆炸功能时，在用逗号分隔字段时，当实际字段中有逗号时，它会导致我出现问题，如果我正确使用控制字符，你们中的任何人都可以告诉我吗？

0x1d =组分隔符

0x1f =单位/字段分隔符

0x1e =记录分隔符

SELECT 
    sub.merchant_id, 
    SUM(sub.rating_count) as total_count,
    ROUND(sub.rating_total / SUM(sub.rating_count)) as rating,
    GROUP_CONCAT(sub.provider_info,0x1f,sub.rating_count,0x1f,sub.average_rating SEPARATOR 0x1d) as provider_counts
        FROM(
            SELECT merchants.merchant_id as merchant_id,
            CONCAT(review_providers.name,0x1e,review_types.profile_url) as provider_info,
            review_providers.id as provider_id,
            ROUND(AVG(reviews.rating),1) as average_rating,
            SUM(reviews.rating) as rating_total,
            COUNT(reviews.rating) as rating_count
        FROM merchants
            INNER JOIN review_types ON merchants.merchant_id = review_types.foreign_key AND review_types.type = "merchants"
                    INNER JOIN reviews ON review_types.id = reviews.review_type_id
                    INNER JOIN review_providers ON review_types.review_provider_id =  review_providers.id
                WHERE merchants.merchant_id IN(1,2,3)
        GROUP BY merchants.merchant_id, review_providers.id
    ) as sub
GROUP BY sub.merchant_id

然后我可以使用explode（chr（29），$ row ['provider_counts']）来正确分离组。