But none of the data stored requires case insensitive seraches or joins. Before I go and change this, I would like to know if anyone knows how much the performance difference is between _ci and non _ci Is it worth while to do this, or will I not see any difference in performance...
You can also use the UPPER() or LOWER() function: WHERE UPPER(SCHEMA_NAME) = 'TEST' WHERE LOWER(SCHEMA_NAME) = 'test' Although a case-insensitive comparison can be performed even on platforms with case-sensitive file systems, as just shown, it is not necessarily always the right thing...
exprrepresents a quantity.unitrepresents the unit for interpreting the quantity; it is a specifier such asHOUR,DAY, orWEEK. TheINTERVALkeyword and theunitspecifier are not case-sensitive. The following table shows the expected form of theexprargument for eachunitvalue. ...
ASENSITIVE(右) AT ATTRIBUTE; 在 8.0.21 中添加(非保留) AUTHENTICATION; 在 8.0.27 中添加(非保留) AUTOEXTEND_SIZE AUTO_INCREMENT AVG AVG_ROW_LENGTH 乙 BACKUP BEFORE(右) BEGIN BETWEEN(右) BIGINT(右) BINARY(右) BINLOG BIT BLOB(右) BLOCK BOOL BOOLEAN BOTH(右) BTREE BUCKETS; 在 8.0.2 中...
The RDS for MySQL parameter lower_case_table_names was set to case sensitive, and then a table containing uppercase letters was created. The parameter setting was later c
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'; ...
By default, table aliases are case-sensitive on Unix, but not so on Windows or macOS. The following statement would not work on Unix, because it refers to the alias both asaand asA: mysql>SELECTcol_nameFROMtbl_nameASaWHEREa.col_name=1ORA.col_name=2; ...
SHOWCOLLATION[LIKE匹配模式];由于一种字符集可能对应多种比较规则，所以展示的结果会更加多，这里就不细...
_cs:全称为case sensitive,这表示大小写敏感的规则 _bin :即binary,表示这是一个二元校对规则,话说二元规则也是一定是大小写敏感规则 MySQL服务响应客户端操作的字符的字符集和客户端信息处理过程: 1.客户端发出的SQL语句,所使用的字符集由系统变量character_set_client来指定 ...
I want my application users could decide if their queries are case-sensitive or case-insensitive over a FULLTEXT column. Is there any other solution different to duplicate the column data and build different fulltext indexes for both (one case-sensitive and other case-insensitive)?