mysql數據批量刪除并且整理表碎片方法

本文主要給大家介紹mysql數據批量刪除并且整理表碎片方法，文章內容都是筆者用心摘選和編輯的，具有一定的針對性，對大家的參考意義還是比較大的，下面跟筆者一起了解下mysql數據批量刪除并且整理表碎片方法吧。 

DROP PROCEDURE IF EXISTS prc_del_loop;
CREATE  PROCEDURE prc_del_loop()
BEGIN
DECLARE v_count INT ;
DECLARE v_data_free INT;
my_del_loop:LOOP  
delete from t_data where  adress = '蘇州日志分析蘇州日志分析' limit 10000;
select count(1) into v_count from (
select * from t_data where adress = '蘇州日志分析蘇州日志分析' limit 1 ) d;
IF v_count=0 THEN        
LEAVE my_del_loop;
END IF;
END LOOP my_del_loop;
SELECT "TABLE DATA HAD DELETED !!!";
#整理碎片，data_free大于等于100M進行整理
select round(sum(data_free/1024/1024),0) into v_data_free
from information_schema.tables where TABLE_SCHEMA= 'data' and table_name = 't';
IF v_data_free >=100 THEN
SELECT "TABLE SHRINK IS RUNNING!!!";
alter table t ENGINE=INNODB;
SELECT "TABLE SHRINK IS FINISHED!!!";
ELSE
SELECT "TABLE SHRINK IS NOT NEED SHRINK!!!";
END IF;
END;

使用游標來進行刪除：
drop PROCEDURE if EXISTS prc_del_loop_cur;
CREATE PROCEDURE prc_del_loop_cur()
BEGIN
DECLARE v_name VARCHAR(2000);
DECLARE v_id BIGINT;
DECLARE done INT DEFAULT 0;
DECLARE cur1 CURSOR FOR SELECT id,name from test where adress = '蘇州日志分析蘇州日志分析';
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;
open cur1;
my_del_loop:LOOP  
fetch cur1 into v_id,v_name;
IF done=1 THEN  
LEAVE my_del_loop;  
END IF;  
delete from test where  id = v_id;
END LOOP my_del_loop;
CLOSE cur1;  
SELECT "delete over !!!";
END;

call prc_del_loop_cur;

看完以上關于mysql數據批量刪除并且整理表碎片方法，很多讀者朋友肯定多少有一定的了解，如需獲取更多的行業知識信息 ，可以持續關注我們的行業資訊欄目的。