智能統計連接mysql中的id

運行此查詢時，COUNT函數不會按'check_if_new_customer'標誌進行過濾。我在這篇文章中讀到：http://dev.mysql.com/tech-resources/articles/wizard/page4.html在某些情況下SUM可以用來代替COUNT來獲得更準確的結果，但是當我嘗試這樣做時，我得到了非常不同的東西，它似乎顯示出數量翻倍。我想這可能是因爲我總結了id字段中的UUID，而不是在那個點上計數。關於我可以在那裏計算所有現有客戶數量與新客戶數量的任何建議？智能統計連接mysql中的id

SELECT 
    YEAR(so.date_entered), 
    so.technical_address_country, 
    so.technical_address_state, 
    COUNT(so.id) as all_sales, 
    COUNT(mf.id) as all_jobs, 
    SUM(so.total_value) as all_value, 
    COUNT(IF(so.check_if_new_customer=1,so.id,0)) as sales_order_new, 
    SUM(IF(so.check_if_new_customer = 1,so.total_value,0)) as total_value_new, 
    COUNT(IF(so.check_if_new_customer=1,mf.id,0)) as jobs_new, 
    COUNT(IF(so.check_if_new_customer=0,so.id,0)) as sales_order_existing, 
    SUM(IF(so.check_if_new_customer = 0,so.total_value,0)) as total_value_existing, 
    COUNT(IF(so.check_if_new_customer=0,mf.id,0)) as jobs_existing, 
    SUM(IF(so.check_if_new_customer=0,mf.id,0)) as jobs_existing_t 
FROM 
    sugarcrm2.so_order so 
LEFT JOIN 
    sugarcrm2.mf_job mf on so.id = mf.sales_order_id 
WHERE 
    so.date_entered > "2011-10-30" AND 
    so.technical_address_country IS NOT NULL AND 
    so.technical_address_state IS NOT NULL AND 
    so.deleted = 0 AND 
    so.has_been_promoted = 1 
GROUP BY 
    YEAR(so.date_entered), 
    so.technical_address_country, 
    so.technical_address_state 
ORDER BY 
    so.technical_address_country, so.technical_address_state

來源

2012-11-07 davidahines