一个表中允许的最大列数是多少Oracle表，在以下版本中？
- 甲骨文8i
- 甲骨文9i
- 甲骨文10g
- 甲骨文11g
- 甲骨文12c
每个表的列数限制为 1,000 列8i http://www.mbjconsulting.com/oracle_links/Oracle_8i_and_9i_Limitations.html, 9i http://docs.oracle.com/cd/B10501_01/server.920/a96536/ch44.htm, 10g http://docs.oracle.com/cd/B19306_01/server.102/b14237/limits003.htm, 11g http://docs.oracle.com/cd/B28359_01/server.111/b28320/limits003.htm, 12c https://docs.oracle.com/en/database/oracle/oracle-database/12.2/refrn/logical-database-limits.html#GUID-685230CF-63F5-4C5A-B8B0-037C566BDA76, 18c https://docs.oracle.com/en/database/oracle/oracle-database/18/refrn/logical-database-limits.html and 19c https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/logical-database-limits.html.
在此之前，Oracle 7 http://docs.oracle.com/cd/A57673_01/DOC/server/doc/SRF73/ch5.htm有 254 列限制。
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