Good morning all,
   
  We have 12 customer lists: CA01, CA02, ….,CA12. 
   
  Table: customerList
+-----------+------+
| list_name |  id  |
+-----------+------+
|    CA10   | 20BE |
|    CA07   | 20BE |
|    CA11   | 20BE |
|    CA03   | 20BE |
|    CA10   | NQCR |
|    CA04   | NQCR |
|    CA02   | MVYK |
|    CA10   | 0BEC |
|    …AND SO ON.   |
+-----------+------+
   
  Each list has 25 to 350 customers.  Same customer_id may exist in multiple 
lists. We need to compare CA10 list customer_id’s with other 11 lists to find 
matching id count by list_name.  The query output should be something similar 
below:
+------+-----------+
| list_name |count |
+------+-----------+
|    CA05   |  60  |
|    CA07   |  42  |
|    CA01   |  35  |
|    CA03   |  28  |
|    CA09   |  15  |
|    …AND SO ON…   |
+-----------+------+
   
  Can this be done with a SELECT statement without using perl or php?  
   
  Thanks in advance for any help.

                
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