sql - Which customer has bought 4 or more items in our store? -

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Which customer has bought 4 or more items in our store? 

  select cutomer.cusName, COUNT (item name) as 'number of items' included on the customer's shop from customer INNER. Cusid = store.cusID by group cutomer.cusName;   
 I'm not sure which product has purchased 4 or more items.   
 
 
 To get those customers, add  HAVING  clause  
  SELECT cutomer.cusName, COUNT itemName (AS) 'item number' by customer.cusID = store.cusID group at customer INNER join store cutomer.cusName hosting number (itemName)> gt; 4 = /

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