Query Writting Problem

Question

I have two tables with the sturcture like this
Cars
car_id      
model      
brand_id      
cat_id      
type_id      
comp_id      
rent      int(11)
description
driver      
status      
publish      
featured
car_pic
pic_id      
car_pic      
car_id
I have a query like this
SELECT car_pic.car_id as cid, model, car_pic from car_pic, cars where car_pic.car_id in (SELECT cars.car_id from category, cars, type, company, brand WHERE cars.cat_id=category.cat_id AND cars.type_id=type.type_id and cars.comp_id=company.comp_id and cars.brand_id=brand.brand_id and category.publish=1 and type.publish=1 and company.publish=1 and brand.publish=1 and cars.publish=1 and cars.status=1 and cars.featured=1 order by cars.car_id) and cars.car_id=car_pic.car_id order by cars.car_id
The Result is like this
cid      model car_pic
19      model car_images/car19/car19_0.jpg
26      model car_images/car26/car26_0.jpg
27      model car_images/car27/car27_0.jpg
29      model car_images/car29/car29_0.jpg
31      model car_images/car31/car31_1.jpg
31      model car_images/car31/car31_0.jpg
This query selects the featured cars images from the database, There can be more than one image for a car.
I want to select only one image for a car. That is the First Pic id in the images table against a car.

Answer 1

I added one filed in the query
SELECT car_pic.pic_id, car_pic.car_id as cid, model, car_pic from car_pic, cars where car_pic.car_id in (SELECT cars.car_id from category, cars, type, company, brand WHERE cars.cat_id=category.cat_id AND cars.type_id=type.type_id and cars.comp_id=company.comp_id and cars.brand_id=brand.brand_id and category.publish=1 and type.publish=1 and company.publish=1 and brand.publish=1 and cars.publish=1 and cars.status=1 and cars.featured=1 order by cars.car_id) and cars.car_id=car_pic.car_id order by cars.car_id
Now the result is like this
pic_id      cid      model      car_pic
1      19      BMW 2010      car_images/car19/car19_0.jpg
1      26      Renault 4      car_images/car26/car26_0.jpg
1      27      Toyota      car_images/car27/car27_0.jpg
1      29      BMW 2014      car_images/car29/car29_0.jpg
2      31      mustang      car_images/car31/car31_1.jpg
1      31      mustang      car_images/car31/car31_0.jpg
I want to select where pic_id= 1
I got idea from your reply and changed the query as
SELECT car_pic.pic_id, car_pic.car_id as cid, model, car_pic from car_pic, cars where car_pic.pic_id=1 and car_pic.car_id in (SELECT cars.car_id from category, cars, type, company, brand WHERE cars.cat_id=category.cat_id AND cars.type_id=type.type_id and cars.comp_id=company.comp_id and cars.brand_id=brand.brand_id and category.publish=1 and type.publish=1 and company.publish=1 and brand.publish=1 and cars.publish=1 and cars.status=1 and cars.featured=1 order by cars.car_id) and cars.car_id=car_pic.car_id order by cars.car_id
Thanks a lot.