A binary string is case-sensitive in comparisons. To compare the string as case-insensitive, convert it to a nonbinary string and useCOLLATEto name a case-insensitive collation: mysql>SET@s=BINARY'MySQL';mysql>SELECT@s='mysql';+---+|@s = 'mysql'|+---+|0|+---+mysql>SELECTCONVERT(...
A binary string is case-sensitive in comparisons. To compare the string as case-insensitive, convert it to a nonbinary string and use COLLATE to name a case-insensitive collation: mysql> SET @s = BINARY 'MySQL'; mysql> SELECT @s = 'mysql'; +---+ | @s = 'mysql' | +---+...
MySQL- charSet: String- caseSensitive: boolean+compareStrings(str1:String, str2:String) : boolean 在上面的类图中,MySQL类包含一个charSet属性用于存储字符集,一个caseSensitive属性表示是否区分大小写,以及一个compareStrings方法用于比较字符串。 总结 MySQL在默认情况下不区分全角和半角字符,这对中文字符的处理尤...
- 校对(Collation)后缀简称会是case-sensitive, accent-sensitive, 或是kana-sensitive（或是同时都有）...
Suppose that we want to compare two string values,AandB. The simplest way to do this is to ...
Suppose that we want to compare two string values, A and B. The simplest way to do this is to look at the encodings: 0 for A and 1 for B. Because 0 is less than 1, we say A is less than B. What we've just done is apply a collation to our character set. The collation is...
All string comparisons are performed in case-sensitive fashion with sorting in ASCII order. Case-insensitive searching MySQL server LIKE is a case-insensitive or case-sensitive operator, depending on the columns involved. If possible, MySQL uses indexes if the LIKE argument doesn’t start with a...
Collation determines how string comparisons are executed, which affects how indexes are used in sorting and searching operations. For example, if your application requires case-insensitive searches, selecting a case-insensitive collation can be more efficient than using a case-sensitive one. However, ...
Use `INSTR()` in combination with `SUBSTRING()` or `REPLACE()` for string manipulation tasks. Handle empty substrings. If the substring is empty, `INSTR()` returns `1`, which might not be intuitive. Be prepared to handle this scenario in your queries. Compare with `LOCATE()`. The `...
Foreign keys and lettercasing.NDBstores the names of foreign keys using the case with which they were defined. Formerly, when the value of thelower_case_table_namessystem variable was set to 0, it performed case-sensitive comparisons of foreign key names as used inSELECTand other SQL statement...