MySQL subquery required help -

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I'm starting a mysql please help me

I have two table images and rates

I want to keep me at IgGID rate.

Image ID as PK in the image table.

The image rate table is foriegn key.

Rate table is sample data 

  ImgID rating 1 5 1 7 1 8 2 8 3 2 4 3 1 4
< P> image table sample data 
  imgid comment rate 1 good 7 2 bad 8 3 ok 8 4 ok 8 5 bad 7

excluded I EmigiId Average (rate from rate table compared to IGG ID)

For example 

  Image if rate - --------- 1 6 2 8 3 2 4 3

I need this output.

Thanks in advance

You do not need a subquery, is required. 

  SELECT IMGID, Rate from ImageID by AVG Rate Rate

If you have a rating or not, then you have all images Want to include: 

  SELECT i.ImgID, Rate it from AVG (RRT) ImageTable on i.ImgID = r.ImgID Group i.ImgID

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