Named SQL queries may be defined in the mapping document and called in exactly the same way as a named HQL query. In this case, we do not need to call AddEntity(). Code highlighting produced by Act...
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2021-07-31 16:24:10
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-- 2012
--https://technet.microsoft.com/zh-cn/library/ms186778(v=sql.110).aspx
--对象目录视图 (Transact-SQL)
select * from sys.foreign_keys
select * from sys.foreign_key_columns
select * from sys.all_colum
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2021-08-10 15:45:58
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Recently I came across with an article on DB2 about using Union instead of OR. So I thought of carrying out a research on SQL Server on what scenarios UNION is optimal in and which scenarios OR would be best. I will analyze this with a few scenarios using samples taken from the AdventureWorks databa
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2011-10-05 22:35:00
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你可以自由地在自定义的 model 方法和模块级(module-level)方法中使用原始 SQL 语句。 django.db.connection 对象表示当前数据库连接，而 django.db.transaction 表示当前数据库的事务。调用 connection.cursor() 会得到一个
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2018-12-30 17:30:00
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# 如何实现 SQL Server 15281 Ad Hoc Distributed Queries
## 介绍
在SQL Server中，启用Ad Hoc分布式查询是一个常见的需求。这可以通过配置“Ad Hoc Distributed Queries”选项来实现。对于刚入行的开发者来说，这可能是一个比较陌生的概念，因此我将在本篇文章中向你介绍如何实现SQL Server 15281 Ad Ho
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2024-03-04 06:52:16
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Updating very large tables can be a time taking task and sometimes it might take hours to finish. In addition to this, it might also cause blocking issues. Here are few tips to optimize the updates on
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2014-04-02 08:29:41
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1126ms (51.28%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 10
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2022-03-25 16:24:55
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1403ms (8.70%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 12
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2022-03-25 16:24:55
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1403ms (8.70%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 12
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2021-08-26 10:37:31
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1040ms (82.42%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 12
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2021-08-26 10:37:33
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1126ms (51.28%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 10
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2021-08-26 10:37:35
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https://github.com/albertodonato/query-exporter query-exporter is a Prometheus exporter which allows collecting metrics from database queries, at specified time intervals.It uses&n
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2024-01-09 11:02:52
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题目：原题链接（困难）标签：SQL解法时间复杂度空间复杂度执行用时Ans 1 (Python)1040ms (82.42%)Ans 2 (Python)Ans 3 (Python)解法一：WITH RECURSIVE MonthList AS ( SELECT 1 AS month UNION ALL SELECT month + 1 FROM MonthList WHERE month < 12
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2022-03-25 16:24:54
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elk笔记13--Queries-compound queries1 compound 查询简介2 compound 查询分类2.1 bool query2.2 boosting query2.3 co。该范畴内的查询包括
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2022-08-29 09:46:22
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Criteria Queries
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2013-06-08 23:27:44
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三、SOA(Service Oriented Ambiguity)面向服务架构SOA 的全称是 Service Oriented Architecture，中文翻译为“面向服务的架构”，诞生于上世纪 90 年代，1996 年 Gartner 的两位分析师 Roy W. Schulte 和 Yefim V. Natis 发表了第一个 SOA 的报告。SOA:它将应用程序的不同功能单元（称为服务）通过
本文翻译自：ERROR 2006 (HY000): MySQL server has gone awayI get this error when I try to source a large SQL file (a big INSERT query). 当我尝试提供大型SQL文件（大型INSERT查询）时，出现此错误。mysql> source file.sql
ERROR 2006
讲缓存之前先了解两个知识点：QPS：Queries Per Second意思是“每秒查询率”，是一台服务器每秒能够相应的查询次数，是对一个特定的查询服务器在规定时间内所处理流量多少的衡量标准。网站能抗住的并发量。TPS：是TransactionsPerSecond的缩写，也就是事务数/秒。它是软件测试结果的测量单位。一个事务是指一个客户机向服务器发送请求然后服务器做出反应的过程。客户机
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2024-07-08 09:48:18
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elk笔记13--Queries-geo queries1 geo查询简介2 geo 查询案例3 说明1 geo查询简介
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2022-08-29 10:09:28
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由于常常使用简单的方式来执行原始/已经准备好的SQL查询,因此可以使用 sequelize.query 方法. 默认情况下,函数将返回两个参数 - 一个结果数组,以及一个包含元数据(例如受影响的行数等)的对象. 请注意,由于这是一个原始查询,所以元数据都是具体的方言. 某些方言返回元数据 "with
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2020-08-05 15:32:00
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