一个数据库操作类,适用于Oracle,ACCESS,SQLSERVER
最近做了 一个 数据诊断的项目,里面自己写了 一个 数据库 的 操作 类,包含:连接 数据库 、读数据表、执行SQL 操作 ,释放 数据库 等组成,希望对大家有用,由于水平有限,若有错误或者代码不足地方欢迎指正,谢谢。 ADOOperate.H ///////////////////////
最近做了一个数据诊断的项目,里面自己写了一个数据库的操作类,包含:连接数据库、读数据表、执行SQL操作,释放数据库等组成,希望对大家有用,由于水平有限,若有错误或者代码不足地方欢迎指正,谢谢。
ADOOperate.H
ADOOperate.C

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Building a Hadoop Distributed File System (HDFS) on a CentOS system requires multiple steps. This article provides a brief configuration guide. 1. Prepare to install JDK in the early stage: Install JavaDevelopmentKit (JDK) on all nodes, and the version must be compatible with Hadoop. The installation package can be downloaded from the Oracle official website. Environment variable configuration: Edit /etc/profile file, set Java and Hadoop environment variables, so that the system can find the installation path of JDK and Hadoop. 2. Security configuration: SSH password-free login to generate SSH key: Use the ssh-keygen command on each node

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