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SELECT TO_NCHAR(a) AS a_nvarchar2, TO_NCHAR(b) AS b_nvarchar2 FROM c; 阅读全文
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@Component public class SpringContextUtils implements ApplicationContextAware, EnvironmentAware { private static ApplicationContext applicationContext 阅读全文
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create user 【name】 identified by 【password】 create tablespace 【namespace】 datafile '/home/oracle/data/xxx.dbf' size 1000M autoextend on next 500m; alt 阅读全文
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列出所有的时区 timedatectl list-timezones 替换成你的时区 Europe/Berlin sudo timedatectl set-timezone Europe/Berlin 以下是如何在 CentOS 8 中配置 chrony 来同步网络时间的步骤: 安装 chrony 阅读全文
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create user COST identified by COST create tablespace COST2 datafile '/home/oracle/data/cost2.dbf' size 1000M autoextend on next 500m; alter user COST 阅读全文
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oracle中将多行共同的合并成一条记录,不同的合并后字符串拼接 select t1.kcbh 课程编码, t1.kcmc 课程名称 , LISTAGG( t1.JZGMC, ', ') WITHIN GROUP (ORDER BY t1.RKLSBM) AS 教职工信息 from ( SELECT 阅读全文
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![](https://img2023.cnblogs.com/blog/1657974/202307/1657974-20230728113425206-1572997502.png) ![](https://img2023.cnblogs.com/blog/1657974/202307/1657 阅读全文
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# 使用mac的包管理工具brew一行命令搞定安装。若未安装brew,命令行先输入以下命令安装brew。 /bin/bash -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)" # 查看安装包 b 阅读全文
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手工创建该函数 a、以sys用户创建包、包体、函数 ``` CREATE OR REPLACE TYPE WM_CONCAT_IMPL AS OBJECT ( CURR_STR VARCHAR2(32767), STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX 阅读全文
yum解决Failed to download metadata for repo ‘appstream‘: Cannot prepare internal mirrorlist: No URLs..
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一、CentOS 8停止更新后,大家使用yum安装程序的时候,会报这个错误: CentOS Linux 8 - AppStream Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mir 阅读全文