Mysql自动增量值选择按ID分组

Question

我有3个MySql表，我需要使用一些信息来填充新表。

SELECT table1.products_id as 'ID',
  concat(table2.table2_name,':',table2.table2_name,':0') as 'att',
  concat(table3.table3_name,':',(@cnt := @cnt + 1)) as 'val' 
FROM table1, table2, table3 
CROSS JOIN (SELECT @cnt := 0) AS dummy 
WHERE table1.options_id=table2.table2_id 
  AND table1.options_values_id=table3.table3_id 
  AND table2.language_id=4 AND table3.language_id=4  

使用此查询，我获得所有这些（正确的）信息

+++++++++++++++++++++++++++++++++++++
+ ID  +   att            +  val     +
+++++++++++++++++++++++++++++++++++++
+ 22  +  Taglia:Taglia:0 +  S:1     +
+ 22  +  Taglia:Taglia:0 +  M:2     +
+ 22  +  Taglia:Taglia:0 +  L:3     +
+ 55  +  Taglia:Taglia:0 +  S:4     +
+ 55  +  Taglia:Taglia:0 +  M:5     +
+ 60  +  Taglia:Taglia:0 +  1:6     +
+ 60  +  Taglia:Taglia:0 +  2:7     +
+ 60  +  Taglia:Taglia:0 +  3:8     +
+ 62  +  Taglia:Taglia:0 +  8,5:9   +
+++++++++++++++++++++++++++++++++++++

但我需要在ID更改时重新启动自动增量值，如下所示：

+++++++++++++++++++++++++++++++++++++
+ ID  +   att            +  val     +
+++++++++++++++++++++++++++++++++++++
+ 22  +  Taglia:Taglia:0 +  S:1     +
+ 22  +  Taglia:Taglia:0 +  M:2     +
+ 22  +  Taglia:Taglia:0 +  L:3     +
+ 55  +  Taglia:Taglia:0 +  S:1     +
+ 55  +  Taglia:Taglia:0 +  M:2     +
+ 60  +  Taglia:Taglia:0 +  1:1     +
+ 60  +  Taglia:Taglia:0 +  2:2     +
+ 60  +  Taglia:Taglia:0 +  3:3     +
+ 62  +  Taglia:Taglia:0 +  8,5:1   +
+++++++++++++++++++++++++++++++++++++

我该怎么做？

部分解决了...... @Shadow评论以正确的方式引导我，但我做错了什么:(

NEW QUERY

    SET @num := 0, @type := '';
SELECT *
    FROM ( select table1.products_id as id, concat(table2.table2_name,':',table2.table2_name,':0') as 'attributo',concat(table3.table3_name,':',@num) as 'valore'  FROM table1, table2, table3 
    WHERE table1.options_id=table2.table2_id AND table1.options_values_id=table3.table3_id AND table2.language_id=4 AND table3.language_id=4  
    ORDER BY `table1`.`products_id` ASC) as table_name2
    WHERE 0 <= GREATEST(
       @num := IF(@type = id, @num + 1, 1),
       LEAST(0, LENGTH(@type := id)))

新结果

+++++++++++++++++++++++++++++++++++++
+ ID  +   att            +  val     +
+++++++++++++++++++++++++++++++++++++
+ 22  +  Taglia:Taglia:0 +  S:2     +
+ 22  +  Taglia:Taglia:0 +  M:4     +
+ 22  +  Taglia:Taglia:0 +  L:6     +
+ 55  +  Taglia:Taglia:0 +  S:2     +
+ 55  +  Taglia:Taglia:0 +  M:4     +
+ 60  +  Taglia:Taglia:0 +  1:2     +
+ 60  +  Taglia:Taglia:0 +  2:4     +
+ 60  +  Taglia:Taglia:0 +  3:6     +
+ 62  +  Taglia:Taglia:0 +  8,5:2   +
+++++++++++++++++++++++++++++++++++++

我哪里错了？