PostgreSQL在Update时使用Substring函数截取字符串并且加上CASE WHEN THEN条件判断
--更新UPDATEwp_order_detailSETlayout_type=(SELECTCASEWHENCHAR_LENGTH(cs.size_code)>=6THENSUBSTRING(cs.size_codeFROM1FOR3)ELSE''ENDFROMwp_catalog_size...
MySQL巧用sum、case和when优化统计查询
这篇文章主要给大家介绍了关于MySQL巧用sum、case和when优化统计查询的相关资料,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
When using SqlDependency without providing an options value, SqlDependency.Start() must be called prior to execution of a command added to the SqlDependency instance.
在调试SignalR程序时,提示一个异常:WhenusingSqlDependencywithoutprovidinganoptionsvalue,SqlDependency.Start()mustbecalledpriortoexecutionofacommandaddedtotheSqlDepe...
flume-sink报错 java.lang.IllegalStateException: close() called when transaction is OPEN - you must either commit or rollback first
1.确认代码无误(根据情况修改,表示若获得不了数据不会自动commit或者rollback):Eventevent=channel.take();if(event==null){returnStatus.BACKOFF;}Ichangeditto:if(event==null){transactio...
Pyspark: when子句中的多个条件。
Iwouldliketomodifythecellvaluesofadataframecolumn(Age)wherecurrentlyitisblankandIwouldonlydoitifanothercolumn(Survived)hasthevalue0forthecorresponding...
SQL中Case When的使用方法
Case具有两种格式。简单Case函数和Case搜索函数。--简单Case函数CASEsexWHEN''THEN'男'WHEN''THEN'女'ELSE'其他'END --Case搜索函数CASEWHENsex=''THEN'男'WHENsex=''THEN'女'ELSE'其他'END这两种方...
SQL中的case when then else end用法
--简单Case函数CASEsexWHEN'1'THEN'男'WHEN'2'THEN'女'ELSE'其他'END--Case搜索函数CASEWHENsex='1'THEN'男'WHENsex='2'THEN'女'ELSE'其他'END这两种方式,可以实现相同的功能。简单Case函数的写法相对比较简洁...
[听听音乐]when you believe [singer: mariah carey]
movie:princeofegyptLyrics ManynightsweprayedWithnoproofanyonecouldhearInourheartsahopeforasongWebarelyunderstoodNowwearenotafraidAlthoughweknowthere's...
Tomcat ssl报错Connector attribute SSLCertificateFile must be defined when using SSL with APR解决方法
这篇文章主要介绍了Tomcat ssl报错Connector attribute SSLCertificateFile must be defined when using SSL with APR解决方法,需要的朋友可以参考下
7月22日-奇舞团关于when.js与promise的分享
关于when.js的使用见屈屈的分享http://www.imququ.com/post/promises-when-js.html关于promise的实现见月影的分享http://www.wumii.com/item/18c3poL1y两位都是360前端知名的大牛,他们的分享已经写的非常深入了。我...
“psql: could not connect to server: Connection refused” Error when connecting to remote database
问题:Iamtryingtoconnecttoapostgresdatabaseinstalledinaremoteserverusingthefollowingcommand:psql-h host_ip -U db_username -d db_nameThistheerrorthatoccur...
hibernate的hql语句不支持 count(case...when ....else..)?
查看帖子:http://www.iteye.com/problems/4499第一次这么写,不行,关键就是:同是聚集函数,sum就OK,而count就不行...........后来还是改用了sql语句,还是sql轻便...hibernate的hql语句不支持count(case...when.......
myqltransactionRollbackexception deadlock found when trying to get lock
linux下远程连接mysq命令:mysql-h"1.0.0.1"-uusername-p 1 获取锁等待情况可以通过检查table_locks_waited和table_locks_immediate状态变量来分析系统上的表锁定争夺:mysql>showstatuslike'Table%';...
Error when insert data from textbox to database
Ihavetextandabuttonandwhenonsubmit,Iamcheckingwhetherthedatabasehasanyrows-ifnottheninsertrowsorelseupdatethem,butonsubmititsthrowinganerrorsayinginco...
TypeError: Error when calling the metaclass bases Cannot create a consistent method resolution
PythonErrorwhencallingthemetaclassbasesCannotcreateaconsistentmethodresolutionorder(MRO)forbases这个异常看下代码应该是多重继承中类的顺序导致的.原因是在写多重继承的时候,父类的顺序导致了python的方法...
sql 中 case when 语法使用方法
sql语言中有没有类似C语言中的switch case的语句?
Getting a sprite to issue a message when it is removed from the scene after removefromParent?
IstheresomewayinSwiftthatIcantellwhenanSKSpriteNodehasactuallybeenremovedfromthescene?Idon'tthinkit'sactuallydonewhenremoveFromParentiscalled,butinste...
Script:when transaction will finish rollback
-----------------------------------------------------------------------------------Script:rolling_back.sql--Purpose:topredictwhentransactionswillfinis...
MySQL 的CASE WHEN 语句使用说明
本文介绍下,在mysql数据库中,有关case when语句的用法,介绍了case when语句的基础知识,并提供了相关实例,供大家学习参考,有需要的朋友不要错过
mysql报错:Deadlock found when trying to get lock; try restarting transaction的解决方法
这篇文章主要给大家介绍了关于mysql出现报错:Deadlock found when trying to get lock; try restarting transaction的解决方法,文中通过示例代码介绍的非常详细,对大家具有一定的参考学习价值,需要的朋友们下面来一起看看吧。