mysql - 非常に遅いクエリ

Question

私は mysql をまったく初めて使用し、以下の mysql クエリを実行しようとしましたが、実行が非常に遅く、何時間もかかっているようです。テーブルは約 100MB で、約 200 万行が含まれています。

Create TEMPORARY table temp_table as 
(
SELECT
  pcur.RECORD_ID,
  pcur.Price,
  (pcur.Price - plast.Price) as 'Price_Difference',
        CASE 
       when plast.Price between 0 and 0.25 then ((pcur.Price - plast.Price)/0.001)
        when plast.Price between 0.2501 and 0.5 then ((pcur.Price - plast.Price)/0.005)
        when plast.Price between 0.5001 and 10 then ((pcur.Price - plast.Price)/0.01)
        when plast.Price between 10.0001 and 20 then ((pcur.Price - plast.Price)/0.02)
        when plast.Price between 20.0001 and 100 then ((pcur.Price - plast.Price)/0.05)
        when plast.Price between 100.0001 and 200 then ((pcur.Price - plast.Price)/0.1)
        when plast.Price between 200.0001 and 500 then ((pcur.Price - plast.Price)/0.2)
        when plast.Price between 500.0001 and 1000 then ((pcur.Price - plast.Price)/0.5)
        when plast.Price between 1000.0001 and 2000 then ((pcur.Price - plast.Price)/1)
        when plast.Price between 2000.0001 and 5000 then ((pcur.Price - plast.Price)/2)
        when plast.Price between 5000.0001 and 9995 then ((pcur.Price - plast.Price)/5)
    END AS Price_Diff_Ticks
FROM
  /* First aliased table is the current record */
  00005 pcur
  /* Second aliased table is the previous one, whose id is one behind */
  LEFT JOIN 00005 plast ON (pcur.Record_ID = plast.Record_ID + 1)

)
;

テーブルのインデックス レポート。

"Table" "Non_unique"    "Key_name"  "Seq_in_index"  "Column_name"   "Collation" "Cardinality"   "Sub_part"  "Packed"    "Null"  "Index_type"    "Comment"   "Index_comment"
============================================================================================
"00005" "0" "PRIMARY"   "1" "RECORD_ID" "A" "2275579"   ""  ""  ""  "BTREE" ""  ""

私は何を間違っているのですか、それとも遅くするために何を逃したのですか?