https://www.codeproject.com/Articles/43305/Tracing-SQL-Queries-in-Real-Time-for-MySQL-Databas     Assembly and MySQL Introduction One of the more interesting things for any person is to see how the internal engines from the server software work. The…

Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect. 这是因为MySql运行在safe-updates模式下,该模式会导致非主键条件下无法执行u…

使用MySQL执行update的时候报错:   MySQL     在使用mysql执行update的时候,如果不是用主键当where语句,会报如下错误,使用主键用于where语句中正常. 异常内容:Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle t…

video from youtube: http://www.youtube.com/watch?v=79NWqv3aPRI one blog post: Monitor All SQL Queries in MySQL http://www.howtogeek.com/howto/database/monitor-all-sql-queries-in-mysql/ more: Using the New MySQL Query Profiler http://web.archive.org/w…

在Sqoop往mysql导出数据的时候报了这个错误,一开始还以为是jar包没有打进去或者打错位置了,未解便上网查询. Error reading from database: java.sql.SQLException: Streaming result set com.mysql.jdbc.RowDataDynamic@27ce24aa is still active. No statements may be issued when any streaming result sets are…

Raw SQL Queries Entity Framework allows you to query using LINQ with your entity classes. However, there may be times that you want to run queries using raw SQL directly against the database. This includes calling stored procedures, which can be help…

原文 Executing Raw SQL Queries using Entity Framework While working with Entity Framework developers mostly use LINQ to Entities to query database. However, at times you may need to execute raw queries against the database. A common scenario is when yo…

Thinkphp中查询复杂sql查询表达式,如何表达MYSQL中的某字段不为空is not null?先上两种实现方式的实例:$querys["house_type_image"] = array('NEQ','NULL'); //判断字段不为空//$querys["house_type_image"] = array('exp','is not null');//其中的exp表示MYSQL的表达式查询,支持各种MYSQL语句的添加-----------------…

Entity Framework Core allows you to drop down to raw SQL queries when working with a relational database. This can be useful if the query you want to perform can't be expressed using LINQ, or if using a LINQ query is resulting in inefficient SQL bein…

写在前面 前段时间在实时获取SQLServer数据库变化时候,整个过程可谓是坎坷.然后就想在这里记录一下. 本文的技术栈: Debezium SQL Server Source Connector+Kafka+Spark+MySQL ps:后面应该会将数据放到Kudu上. 然后主要记录一下,整个组件使用和组件对接过程中一些注意点和坑. 开始吧 在处理实时数据时,需要即时地获得数据库表中数据的变化,然后将数据变化发送到Kafka中.不同的数据库有不同的组件进行处理. 常见的MySQL数据库,就有比…