===========================================================
才弄明白Number(p,s)的意义
===========================================================
作者: grassbell(http://grassbell.itpub.net)
发表于: 2004.10.26 10:39
分类:
Oracle
出处: http://grassbell.itpub.net/post/26/3796
---------------------------------------------------------------
number(p,s)
p:1~38
s:-84~127
p>0，对s分2种情况分析：
1. s>0
精确到小数点右边s位，并四舍五入。然后检验有效数位是否<=p；如果s>p，小数点右边至少有s-p个0填充。
2. s<0
精确到小数点左边s位，并四舍五入。然后检验有效数位是否<=p+|s|
(有效数位：从左边第一个不为0的数算起)
Value | Datatype | Stored Value |
123.2564 | NUMBER | 123.2564 |
1234.9876 | NUMBER(6,2) | 1234.99 |
12345.12345 | NUMBER(6,2) | Error |
1234.9876 | NUMBER(6) | 1235 |
12345.345 | NUMBER(5,-2) | 12300 |
1234567 | NUMBER(5,-2) | 1234600 |
12345678 | NUMBER(5,-2) | Error |
123456789 | NUMBER(5,-4) | 123460000 |
1234567890 | NUMBER(5,-4) | Error |
12345.58 | NUMBER(*, 1) | 12345.6 |
0.1 | NUMBER(4,5) | Error |
0.01234567 | NUMBER(4,5) | 0.01235 |
0.09999 | NUMBER(4,5) | 0.09999 |
0.099996 | NUMBER(4,5) | Error |
grassbell
发表于:2004.10.26 10:39
::分类:
(
Oracle
)
::阅读:(45990次)
::
评论
(3271)
[回复]
number(p,s)的最大值和最小值是多少，文档说最大值是38个9后面88个10，我觉得应该是84个，请教一下！
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评论于: 2004.12.23 23:28
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