【數據庫-MySql】清空所有表格的所有數據

方式一、

   
   
  
  
          
 
           
 
            
 
             
 
            
 
            
 
             
 
              drop 
              procedure 
              if 
              exists del_all_tb; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               delimiter $$ 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              create 
              procedure del_all_tb(db 
              char( 
              20)) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              begin 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              declare done 
              int 
              default 
              0; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              declare tb 
              char( 
              100); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              declare cur 
              cursor 
              for 
              select table_name 
              from infoRmation_schema.tables 
              where table_schema = db 
              and table_type = 
              "BASE TABLE"; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              declare continue 
              handler 
              for 
              not 
              found 
              set done = 
              1; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               open cur; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               repeat 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               fetch cur into tb; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              set @ 
              sql := 
              concat( 
              "truncate ", tb, 
              ";"); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              prepare stmt 
              from @ 
              sql; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              execute stmt; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              deallocate 
              prepare stmt; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               until done 
              end 
              repeat; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               close cur; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              end $$ 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               delimiter ; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              call del_all_tb( 
              "atdps"); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              drop 
              procedure 
              if 
              exists del_all_tb; 
             
 
            
 
          
  
  
 
 
         

方式二、

   
   
  
  
          
 
           
 
            
 
             
 
            
 
            
 
             

               #如果存在del_all_tb存儲過程則刪除del_all_tb存儲過程 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              drop 
              procedure 
              if 
              exists del_all_tb; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #如果存在 tmpTable 臨時表則刪除 del_all_tb 臨時表 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              DROP 
              TABLE 
              if 
              EXISTS tmpTable; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #創建 del_all_tb存儲過程 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              create 
              procedure del_all_tb(db 
              char( 
              20)) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              begin 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #申明變量 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              DECLARE tntmp 
              VARCHAR( 
              100); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #創建臨時表 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              create 
              table tmpTable (tablename 
              VARCHAR( 
              100),flag 
              int); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #清空臨時表 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              truncate 
              TABLE tmpTable; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #將需要清空的表插入到臨時表 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              INSERT 
              INTO tmpTable(tablename , flag ) ( 
              SELECT table_name , 
              0 
              as a 
              FROM information_schema.tables 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              WHERE table_schema = db 
              and table_type= 
              'BASE TABLE'); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #循環獲取所有的表明以及刪除狀態 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              SELECT tablename 
              into tntmp 
              FROM tmpTable 
              WHERE flag = 
              0 
              limit 
              1; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               WHILE tntmp <> '' 
              DO 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #拼寫刪除語句 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              set @sqlText := 
              concat( 
              "truncate ", tntmp, 
              ";"); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              prepare stmt 
              from @sqlText; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #執行語句 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              execute stmt; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #釋放刪除語句 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              deallocate 
              prepare stmt; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #更新表狀態 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              UPDATE tmpTable 
              SET flag= 
              1 
              WHERE tablename = tntmp; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #選擇一下條語句 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              SELECT tablename 
              into tntmp 
              FROM tmpTable 
              WHERE flag = 
              0 
              limit 
              1; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              END 
              WHILE; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              end; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              call del_all_tb( 
              "atdps"); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #如果存在del_all_tb存儲過程則刪除del_all_tb存儲過程 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              drop 
              procedure 
              if 
              exists del_all_tb; 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               #如果存在 tmpTable 臨時表則刪除 del_all_tb 臨時表 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              DROP 
              TABLE 
              if 
              EXISTS tmpTable;