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;
,
mysql'sblobissuitableForStoringBinaryDataWithInareLationalDatabase,而ilenosqloptionslikemongodb,redis和calablesolutionsolutionsolutionsoluntionsoluntionsolundortionsolunsonstructureddata.blobobobissimplobisslowdeperformberbutslowderformandperformancewithlararengedata;

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 lengengtrings,varchar forvariable-varchar forbariaible length,andtext/blobforlargerdataa.2 seterters seterters seterters

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

優化MySQLBLOB請求可以通過以下策略:1.減少BLOB查詢頻率,使用獨立請求或延遲加載;2.選擇合適的BLOB類型(如TINYBLOB);3.將BLOB數據分離到單獨表中;4.在應用層壓縮BLOB數據;5.對BLOB元數據建立索引。這些方法結合實際應用中的監控、緩存和數據分片,可以有效提升性能。

掌握添加MySQL用戶的方法對於數據庫管理員和開發者至關重要,因為它確保數據庫的安全性和訪問控制。 1)使用CREATEUSER命令創建新用戶,2)通過GRANT命令分配權限,3)使用FLUSHPRIVILEGES確保權限生效,4)定期審計和清理用戶賬戶以維護性能和安全。

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

在MySQL中處理字符串數據類型和索引的最佳實踐包括:1)選擇合適的字符串類型,如CHAR用於固定長度,VARCHAR用於可變長度,TEXT用於大文本;2)謹慎索引,避免過度索引,針對常用查詢創建索引;3)使用前綴索引和全文索引優化長字符串搜索;4)定期監控和優化索引,保持索引小巧高效。通過這些方法,可以在讀取和寫入性能之間取得平衡,提升數據庫效率。


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