作者pakker (找寻蔚蓝天空)
看板Database
标题Re: 请问资料库最大的栏位个数
时间Thu Dec 6 22:04:51 2007
Oracle:
http://download-east.oracle.com/docs/
cd/B19306_01/server.102/b14237/limits003.htm
Columns Per table 1000 columns maximum
Per index (or clustered index) 32 columns maximum
Per bitmapped index 30 columns maximum
MySQL:
http://dev.mysql.com/doc/refman/5.0/en/column-count-limit.html
There is a hard limit of 4096 columns per table, but the
effective maximum may be less for a given table.
* MyISM: maximum row size of 65,535 bytes, max columns depend on column type.
* InnoDB: allows no more than 1000 columns.
※ 引述《senhuo (努力吧)》之铭言:
: ※ 引述《PsMonkey (痞子军团团长)》之铭言:
: : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: : 有找过官网了吗? 有找过 document 了吗?
: 找了 不过没找到 XD
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 59.121.3.206
※ 编辑: pakker 来自: 59.121.3.206 (12/06 22:09)