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                            SQL語句主要分為：

*   **DQL：數據查詢語言，用于對數據進行查詢，如select**
*   **DML：數據操作語言，對數據進行增加、修改、刪除，如insert、udpate、delete**
*   TPL：事務處理語言，對事務進行處理，包括begin transaction、commit、rollback
*   DCL：數據控制語言，進行授權與權限回收，如grant、revoke
*   DDL：數據定義語言，進行數據庫、表的管理等，如create、drop
*   CCL：指針控制語言，通過控制指針完成表的操作，如declare cursor
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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