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                            > 數據庫優化這一塊是每個組員必須嚴格遵守的規范, **作為代碼審查的重要標準**
1. 建議查詢數據時候, 盡量不要使用循環查詢數據
2. select * xxx, count(*)的操作, 必須帶上指定列
3. 聚合算法, 盡量不要在sql中做, 在服務端使用代碼進行聚合
4. 遞歸操作不允許使用數據庫查詢操作
5. 索引優化, 在產品維護的過程中,持續做
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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