2Table and database names are stored on disk using the lettercase specified in theCREATE TABLEorCREATE DATABASEstatement, but MySQL converts them to lowercase on lookup. Name comparisons are not case-sensitive.
Notice:Column, index, stored routine, and event names are not case sensitive on any platform, nor are column aliases. 下面在测试环境为Red Hat Enterprise Linux Server release 5.7, MySQL 5.6.20: mysql>showvariableslike'lower_case_table_names'; +---+---+ | Variable_name | Value | +---+...
mysql是通过lower_case_table_names参数来控制大小写敏感的,该参数在[mysqld]结点下。具体的含义笔者从官网截了一张图。 注: ①关于lower_case_table_names参数对表名称或数据库名称大小写敏感的控制。 ② Unix下默认为0,也就是大小写敏感的;Windows下默认为1,不敏感;macO...
MYSQL 建表默认的字符编码是 UTF8_GENERAL_CI,所以建议在 MYSQL 迁移到 DM 时,在达梦端设置成大小写不敏感 CASE_SENSITIVE=0。如果 MYSQL 系统中使用的字符编码是 UTF8_GENERAL_CS,那么建议达梦端设置成大小写敏感 CASE_SENSITIVE=1。MYSQL 设置大小写敏感的细粒度可到字段级别,达梦是实例级别的,一旦设置,后续...
To cause a case-sensitive comparison of nonbinary strings to be case-insensitive, useCOLLATEto name a case-insensitive collation. The strings in the following example normally are case-sensitive, butCOLLATEchanges the comparison to be case-insensitive: ...
(HFS+) that is not case-sensitive. However, macOS also supports UFS volumes, which are case-sensitive just as on any Unix. SeeSection 1.8.1, “MySQL Extensions to Standard SQL”. Thelower_case_table_namessystem variable also affects how the server handles identifier case sensitivity, as ...
*_bin: 表示的是binarycasesensitive collation,也就是说是区分大小写的*_cs:casesensitive collation,区分大小写*_ci:caseinsensitive collation,不区分大小写 ### # Start binary collation example ### mysql> create table case_bin_test (word VARCHAR(10)) CHARACTER SET latin1COLLATE latin1_bin; Query...
3)utf8_general_cs:utf8_general_cs区分大小写,cs为case sensitive的缩写,即大小写敏感。 注:我本机使用5.7 版本不支持 utf8_general_cs 字符集,创建报错。 通过上一篇和这一篇的内容,详细大家对mysql对大小写敏感的问题也有一定的认识了,在实际的开发中,库和表名最好使用小写字母,注意字段存储内容的大写问题...
Hi Friends, I want to do case sensitive select query like this select * from usertbl where name = "abr" but the result selects even upper case records as well as lower case records can any one help me / advice me how to do case sensitive select query...
另外额外提一下Oracle里面的大小写问题,Oracle里面在11g有一个默认参数sec_case_sensitive_logon,这个参数的实际应用真是有些悲剧,一来很多客户对这个特性并不喜欢,看似从安全的角度来调控,但似乎带来了更多的问题,有相当一部分是习惯使然,而另外一方面是因为这个参数在11g推出,在12c里面这个参数就过期了,含义也发生了...