sql - MySQL select points which are contained in a polygon from a different table -

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I have two tables

The table has a list of names and places (digits) Table B I have a list of name and shape (polygon)

I want to type a query to find all the points from one 

  select the name from the tblshops where st_contains (Choose size from tbltowns where name = "London", location)

but I'm getting a syntax error. What am I doing wrong? Thank you

'), Location)

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