1,run--cmd-cd C:Program FilesMySQLMySQL Server 5.5bin 2, mysql -uXXXX -pXXXXXX 3, SHOW FULL PROCESSLISTG 4,设置sheduler SET GLOBAL event_scheduler = ON; SET @@global.event_scheduler = ON; SET GLOBAL event_scheduler = 1; SET @@global.event_
1,run-->cmd->cd C:Program FilesMySQLMySQL Server 5.5bin
2, mysql -uXXXX -pXXXXXX
3, SHOW FULL PROCESSLISTG
4,设置sheduler
SET GLOBAL event_scheduler = ON;
SET @@global.event_scheduler = ON;
SET GLOBAL event_scheduler = 1;
SET @@global.event_scheduler = 1;
Similarly, any of these 4 statements can be used to turn off the Event Scheduler:
SET GLOBAL event_scheduler = OFF;
SET @@global.event_scheduler = OFF;
SET GLOBAL event_scheduler = 0;
SET @@global.event_scheduler = 0;
5,create procedure
-- --------------------------------------------------------------------------------
-- Routine DDL
-- Note: comments before and after the routine body will not be stored by the server
-- --------------------------------------------------------------------------------
DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `Get_Info_Every_Day`()
BEGIN
Declare pIntSumTotalAction int;
Declare pIntSumNoduedate int;
Declare pIntSumClosed int;
Declare pIntSumForinfo int;
Declare pIntSumOverdue int;
Declare pIntSumTBDin1Week int;
Declare pIntSumTBDafter1Week int;
Declare pIntSumPendingJPMO int;
Declare pIntSumEPS int;
Declare pIntSumWCI int;
Declare pIntSumOnTimeClosed int;
Declare pIntTotal int; ##统计的时候所有的action items
Declare strStatus varchar(40);
Declare dDuedate datetime;
Declare dClosedDate datetime;
Declare nOverdue int;
Declare nCountOnTime int; ##nIsOnTime count(*)数量
declare fetchSeqOk boolean; ## define the flag for loop judgement
/*
Declare my_cursor cursor for select b.status,b.duedate,b.closedate,datediff(now(),b.duedate) as overdue,
b.fk_actionitem from actionitem a,actionitemdetail b where a.id_actionitem=b.fk_actionitem and a.finishdate=0
and status'forinfo' and (actionby like '%WEC%' or actionby like '%Consortium%' );
*/
Declare my_cursor cursor for select b.status,b.duedate,b.closedate,datediff(now(),b.duedate) as overdue
from actionitem a,actionitemdetail b where a.id_actionitem=b.fk_actionitem and a.finishdate=0
and status'forinfo' and (actionby like '%WEC%' or actionby like '%Consortium%' );
Declare my_cursor2 cursor for select cast(count(*) as UNSIGNED) as lnOnTimeClosedAI from actionitemdetail
where datediff(now(),duedate)=0
and (actionby like '%WEC%' or actionby like '%Consortium%' )
and status='Closed' and datediff(closedate,duedate)
declare continue handler for not found set fetchSeqOk = true;
set pIntSumTotalAction=0;
set pIntSumNoduedate=0;
set pIntSumClosed=0;
set pIntSumForinfo=0;
set pIntSumOverdue=0;
set pIntSumTBDin1Week=0;
set pIntSumTBDafter1Week=0;
set pIntSumPendingJPMO=0;
set pIntSumEPS=0;
set pIntSumWCI=0;
set fetchSeqOk = false;
/*
declare continue handler for NOT FOUND set fetchSeqOk = true;
#define the continue handler for not found flag
set fetchSeqOk = false;
open fetchSeqCursor;
fetchSeqLoop:Loop
fetch fetchSeqCursor into _seqname, _value;
if fetchSeqOk then
leave fetchSeqLoop;
else
select _seqname, _value;
end if;
end Loop;
close fetchSeqCursor;
*/
open my_cursor;
fetchLoop:LOOP
fetch my_cursor into strStatus,dDuedate,dClosedDate,nOverdue;
if fetchSeqOk then
leave fetchLoop;
else
if LOWER(strStatus)='open' then
case nOverdue
when isnull(nOverdue) then set pIntSumNoduedate=pIntSumNoduedate+1;
when nOverdue>0 then set pIntSumOverdue=pIntSumOverdue+1 ;
when nOverdue-7 then set pIntSumTBDin1Week=pIntSumTBDin1Week+1;
else set pIntSumTBDafter1Week=pIntSumTBDafter1Week+1;
end case;
else
case LOWER(strStatus)
when 'closed' then set pIntSumClosed=pIntSumClosed+1;
when 'forinfo' then set pIntSumForinfo=pIntSumForinfo+1;
when 'pending jpmo' then set pIntSumPendingJPMO=pIntSumPendingJPMO+1;
when 'escalated to pcc for support' then set pIntSumEPS=pIntSumEPS+1;
when 'waiting for customer input' then set pIntSumWCI=pIntSumWCI+1;
end case;
end if;
end if;
End LOOP;
close my_cursor;
set pIntTotal=pIntSumTBDafter1Week+pIntSumOverdue+pIntSumTBDin1Week+
pIntSumNoduedate+pIntSumPendingJPMO+pIntSumEPS+pIntSumWCI+pIntSumClosed;
/*** 统计从当前日期向前推7天的committed closed情况
nCountOnTime 表示count of on time closed number
*/
set fetchSeqOk = false;
open my_cursor2;
my_loop:Loop
fetch my_cursor2 into nCountOnTime;
if fetchSeqOk then
leave my_loop;
else
set pIntSumOnTimeClosed=nCountOnTime;
end if;
end Loop;
close my_cursor2;
insert into mytest(testdate)value(now());
insert into daily_statistic(Total,Open,overdue,DueWithin7Days,PTP,NoDueDate,PendingJPMO,EPS,WCI,Closed)
values(pIntTotal,pIntSumTBDafter1Week,pIntSumOverdue,pIntSumTBDin1Week,
pIntSumOnTimeClosed,pIntSumNoduedate,
pIntSumPendingJPMO,pIntSumEPS,pIntSumWCI,pIntSumClosed);
/*
insert into daily_statistic(Total,Open,overdue,DueWithin7Days,PTP,NoDueDate,PendingJPMO,EPS,WCI,Closed)values
(pIntTotal,pIntSumTBDafter1Week,pIntSumOverdue,pIntSumTBDin1Week,10,pIntSumNoduedate,
pIntSumPendingJPMO,pIntSumEPS,pIntSumWCI,pIntSumClosed);
*/
END
6,create event
use cddl;
DROP EVENT IF EXISTS e_statistics_daily;
CREATE EVENT e_statistics_daily
ON SCHEDULE EVERY 1 Day
STARTS '2013-10-18 16:45:00'
on completion preserve
DO CALL Get_Info_Every_Day();
7, testing whether it is having the value or not
select * from daily_statistic;
,
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toaddauserinmysql,使用:createUser'username'@'host'Indessify'password'; there'showtodoitsecurely:1)choosethehostcarecarefullytocon trolaccess.2)setResourcelimitswithoptionslikemax_queries_per_hour.3)usestrong,iniquepasswords.4)Enforcessl/tlsconnectionswith

toAvoidCommonMistakeswithStringDatatatPesInMysQl,CloseStringTypenuances,chosethirtightType,andManageEngencodingAndCollationsEttingsefectery.1)usecharforfixed lengengters lengengtings,varchar forbariaible lengength,varchariable length,andtext/blobforlabforlargerdata.2 seterters seterters seterters seterters

mysqloffersechar,varchar,text,and denumforstringdata.usecharforfixed Lengttrings,varcharerforvariable长度,文本forlarger文本,andenumforenforcingDataAntegrityWithaEtofValues。

优化MySQLBLOB请求可以通过以下策略:1.减少BLOB查询频率,使用独立请求或延迟加载;2.选择合适的BLOB类型(如TINYBLOB);3.将BLOB数据分离到单独表中;4.在应用层压缩BLOB数据;5.对BLOB元数据建立索引。这些方法结合实际应用中的监控、缓存和数据分片,可以有效提升性能。

掌握添加MySQL用户的方法对于数据库管理员和开发者至关重要,因为它确保数据库的安全性和访问控制。1)使用CREATEUSER命令创建新用户,2)通过GRANT命令分配权限,3)使用FLUSHPRIVILEGES确保权限生效,4)定期审计和清理用户账户以维护性能和安全。

chosecharforfixed-lengthdata,varcharforvariable-lengthdata,andtextforlargetextfield.1)chariseffity forconsistent-lengthdatalikecodes.2)varcharsuitsvariable-lengthdatalikenames,ballancingflexibilitibility andperformance.3)

在MySQL中处理字符串数据类型和索引的最佳实践包括:1)选择合适的字符串类型,如CHAR用于固定长度,VARCHAR用于可变长度,TEXT用于大文本;2)谨慎索引,避免过度索引,针对常用查询创建索引;3)使用前缀索引和全文索引优化长字符串搜索;4)定期监控和优化索引,保持索引小巧高效。通过这些方法,可以在读取和写入性能之间取得平衡,提升数据库效率。


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