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SQLPLUS中的feedback设置

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Jun 07, 2016 pm 04:44 PM

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使用SQLPLUS执行SQL时，像SELECT语句通常返回结果可以带有ldquo;已返回XX行rdquo;这样的提示，但最近打开一个库发现没有这样的

使用SQLPLUS执行SQL时，像SELECT语句通常返回结果可以带有“已返回XX行”这样的提示，但最近打开一个库发现没有这样的提示。经@乔晓阳大师指点，有个feedback的参数设置，现总结如下。

feedback可以简写为feed，，它有三个取值：ON/OFF/N，ON表示打开SQL反馈(DDL和DML、PLSQL略有不同)，OFF表示关闭反馈，N表示可以设置一个整数，当SQL返回的结果大于等于N时才会有反馈。

实验：

1. feed为OFF和ON的查询结果：

2. 查看feed的默认设置，当返回6行时才会有反馈，通过执行SQL可以说明此点：

3. 设置feed N，指定返回N行就反馈：

SQLPLUS中的feedback设置

总结：

Oracle中任何细小的环节，都蕴含着丰富的知识点，不同的结果有着不同的原因，这才体现出Oracle作为老大的魅力，只能感叹自己太渺小，需要学习的太多太多，共勉！

Oracle学习笔记：sqlplus用户登录

sqlplus登录Oracle时ORA-01017: invalid username/password; logon denied的错误

在CentOS 6.4下安装Oracle 11gR2(x64)

Oracle 11gR2 在VMWare虚拟机中安装步骤

Debian 下安装 Oracle 11g XE R2

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