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'
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...
Description:When using built-in functions (i.e. get_lock) the digest hashing depends on the case used in the function. This makes it much harder to use a query rewrite rule, since there needs to be one-rule per case.How to repeat:The last select returns 2 rows. Ideally it should ret...
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...
# Startcasesensitive collation example ### mysql> create table case_cs_test (word VARCHAR(10)) CHARACTER SET latin1 COLLATE latin1_general_cs; Query OK,0rows affected (0.08sec) mysql> INSERT INTO case_cs_test VALUES ('Frank'),('Google'),('froogle'),('flickr'),('FlicKr'); Query OK...
(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 ...
To cause a case-sensitive comparison of nonbinary strings to be case-insensitive, use COLLATE to name a case-insensitive collation. The strings in the following example normally are case-sensitive, but COLLATE changes the comparison to be case-insensitive: mysql> SET @s1 = 'MySQL' COLLATE la...
(although there are some character sets that are never case-insensitive, such asczech). That means that if you search withcol_name LIKE 'a%', you will get all column values that start withAora. If you want to make this search case-sensitive, use something likeINSTR(col_name, "A")=...
In MySQL 8.0.1 the corresponding accent and case sensitive collations (as_cs) have also been added, as well as a Japanese collation:mysql> select collation_name from information_schema.collations where character_set_name='utf8mb4' and collation_name like '%as_cs' order by collation_name; ...
cs为case sensitive的缩写,即大小写敏感;bin的意思是二进制,也就是二进制编码比较。 utf8_general_cs排序规则下,即便是区分了大小写,但是某些西欧的字符和拉丁字符是不区分的,比如ä=a,但是有时并不需要ä=a,所以才有utf8_bin utf8_bin的特点在于使用字符的二进制的编码进行运算,任何不同的二进制编码都是...