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)》之銘言:
: ※ 引述《PsMonkey (痞子軍團團長)》之銘言:
: : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: : 有找過官網了嗎? 有找過 document 了嗎?
: 找了 不過沒找到 XD
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※ 編輯: pakker 來自: 59.121.3.206 (12/06 22:09)