ชื่อของรายการแค็ตตาล็อกที่มีระดับ 8 มีกี่รายการ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What are the number of the names of catalog entries with level number 8?It is not neccessary to use all the tables.
 Catalog_Contents:  catalog_entry_id [ INTEGER]  catalog_level_number [ INTEGER]  parent_entry_id [ INTEGER]  previous_entry_id [ INTEGER]  next_entry_id [ INTEGER]  catalog_entry_name [ VARCHAR(80)]  product_stock_number [ VARCHAR(50)]  price_in_dollars [ DOUBLE]  price_in_euros [ DOUBLE]  price_in_pounds [ DOUBLE]  capacity [ VARCHAR(20)]  length [ VARCHAR(20)]  height [ VARCHAR(20)]  width [ VARCHAR(20)] 
SELECT catalog_entry_name, COUNT(catalog_entry_name) FROM Catalog_Contents AS t1 JOIN Catalog_Contents_Additional_Attributes AS t2 ON t1.catalog_entry_id = t2.catalog_entry_id WHERE t2.catalog_level_number = "8" GROUP BY catalog_entry_name