如何在sql存儲過程中使變量保持不變,並在每次調用存儲過程時保持不變 [英]How to keep a variable in sql stored procedure constant and unchanged in every call to the stored procedure
MySQL存儲過程為電話呼叫找到最接近的匹配呼叫率 [英]MySQL stored procedure to find the closest matching call rate for a phone call