Oracle number date varchar2字段类型占用空间大小
Jun 07, 2016 pm 05:38 PMoracledate类型占用存储空间是7个字节oraclevarchar2类型占用存储空间是每个字符占用一个字节oraclenumber类型占用存储空间是几个字节number最少占用两个字节,
oracle date类型占用存储空间是7个字节
oracle varchar2类型占用存储空间是每个字符占用一个字节
oracle number类型占用存储空间是几个字节
number最少占用两个字节,以后每增加两位数就增加一个字节,,最多占用21个字节
例 NUMBER(20)
计算方式
select floor((20+1)/2)+1 from dual;
FLOOR((20+1)/2)+1
-----------------
11
oracle number date varchar2
Leonarding
2013.11.06
北京&autumn
分享技术~成就梦想
Blog:
本文出自 “分享技术~成就梦想” 博客,请务必保留此出处

Hot Article

Hot tools Tags

Hot Article

Hot Article Tags

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Function to calculate the number of days between two dates in oracle

How long will Oracle database logs be kept?

The order of the oracle database startup steps is

Oracle database server hardware configuration requirements

How to see the number of occurrences of a certain character in Oracle

How to determine whether two strings are contained in oracle
