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MySQL與Oracle的大小寫問題

時間：2014-07-22 23:06:56 阅读：327 評論：0 收藏：0 [點我收藏+]

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轉載來源：http://aofengblog.blog.163.com/blog/static/63170212010101065030136/

MySQL與Oracle在大小寫處理上的區別：

1MYSQL

1、在Windows下，數據庫名、表名、字段名不区分大小写。
2、大Linux/Unix下，數據庫名、表名区分大小写，字段名不区分大小写。
3、編輯/etc/my.cnf，設置lower_case_table_names可以讓MySQL是否區分表名的大小寫。

0：區分大小寫；
1：不區分大小寫。

2Oracle

1、在Oracle中，如果字段名稱被雙引號（""）包裹，Oracle會區分大小寫；
2、如果字段名稱沒有被雙引號（""）包裹，則全部轉換成大寫來執行。
3、如果表结构设计时，字段名称使用了數據庫的保留字，SQL中的字段名称必须用双引号（""）包裹，以避免SQL语句执行出错。不建议用數據庫的保留字来做表名和字段名。

以下SQL语句在Oracle中执行时，字段 stat_time, interval 没有被双引号（""）包裹，不区分大小写：
insert into smsc_flow(stat_time,interval,"MODULEID","SMSCNO","ICPNO","MT_OK","MT_FAIL","MT_DELAY","MO_OK","MO_FAIL","STATUS_OK","STATUS_FAIL","SUCCESS_STATUS","COUNT") values(‘20101010112‘,1,‘MT001‘,1,1,1,1,1,1,1,1,1,1,1)

以下SQL语句在Oracle中执行时，字段 stat_time, interval 被双引号（""）包裹，全部转换成大写执行：
insert into smsc_flow

("stat_time","interval","MODULEID","SMSCNO","ICPNO","MT_OK","MT_FAIL","MT_DELAY","MO_OK","MO_FAIL","STATUS_OK","STATUS_FAIL","SUCCESS_STATUS","count") values(‘20101010111‘,‘20101010111‘,1,‘MT001‘,1,1,1,1,1,1,1,1,1,1,1)

MySQL與Oracle的大小寫問題,码迷,mamicode.com

MySQL與Oracle的大小寫問題

標簽：style blog http color 使用數據

原文地址：http://www.cnblogs.com/huxiaoyun90/p/3700534.html

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