使用SQL Server变量的时候碰到变量名称大小写的问题: 当前数据库是大小写不敏感的,但是声明变量之后发现变量名称是大小写敏感的。一直认为SQL Server的变量名称的Collcation是跟当前数据库的,在MSDN: You cannot specify a collation for character vari
使用SQL Server变量的时候碰到变量名称大小写的问题:
当前数据库是大小写不敏感的,但是声明变量之后发现变量名称是大小写敏感的。一直认为SQL Server的变量名称的Collcation是跟当前数据库的,在MSDN:
You cannot specify a collation for character variables and parameters; they are always created with the default collation of the database.http://msdn.microsoft.com/en-us/library/aa174903(v=sql.80).aspx
但是这篇文章只是提到变量的数据是跟当前数据的,但是没有提到变量名称的Collcation. 之后在MSDN论坛发现有相同的问题,微软工程师的回复如下:
Please note that variable collation is based on the server side (master db) collation, not on the user database collation.
For example if you have a case sensitive server, but a case-insensitive user database the variable declarions are case sensitive, since they live in memory of the server, and that uses the server collation.(http://social.msdn.microsoft.com/Forums/en-US/vstsdb/thread/0d833fab-2b32-4b98-a3ab-cdf8c743e5e0)
综上可以得出SQL Server变量名称的Collcation是跟系统Master数据库,也就是Instance的Collation.

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本篇文章给大家带来了关于SQL server的相关知识,其中主要介绍了SQL SERVER没有自带的解析json函数,需要自建一个函数(表值函数),下面介绍关于SQL Server解析/操作Json格式字段数据的相关资料,希望对大家有帮助。

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monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i

本篇文章给大家带来了关于SQL server的相关知识,开窗函数也叫分析函数有两类,一类是聚合开窗函数,一类是排序开窗函数,下面这篇文章主要给大家介绍了关于SQL中开窗函数的相关资料,文中通过实例代码介绍的非常详细,需要的朋友可以参考下。

0x01前言概述小编又在MySQL中发现了一个Double型数据溢出。当我们拿到MySQL里的函数时,小编比较感兴趣的是其中的数学函数,它们也应该包含一些数据类型来保存数值。所以小编就跑去测试看哪些函数会出现溢出错误。然后小编发现,当传递一个大于709的值时,函数exp()就会引起一个溢出错误。mysql>selectexp(709);+-----------------------+|exp(709)|+-----------------------+|8.218407461554972

当某些sql因为不知名原因堵塞时,为了不影响后台服务运行,想要给sql增加执行时间限制,超时后就抛异常,保证后台线程不会因为sql堵塞而堵塞。一、yml全局配置单数据源可以,多数据源时会失效二、java配置类配置成功抛出超时异常。importcom.alibaba.druid.pool.DruidDataSource;importcom.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;importorg.apache.

monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i


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