MySQL Regular Expression Replace?
For string processing, the databases can not perform as good as middlewares. For example, you may see every kind of regular expression related functions equipped… Read More »MySQL Regular Expression Replace?
RLIKE
Regular Expression Number Pattern
You may put some values which are potentially numeric in a VARCHAR column, and you would like to find them out for more operations. Unfortunately,… Read More »Regular Expression Number Pattern
MySQL Word Boundaries
Word Boundaries The usual word boundaries in regular expression is b, but MySQL takes POSIX-liked [[:<:]] and [[:>:]] as word boundaries. Now my question is… Read More »MySQL Word Boundaries
REGEXP is Case Sensitive?
According to MySQL documentation: MySQL :: MySQL 8.0 Reference Manual :: 12.8.2 Regular Expressions. match_type may be specified with the c or i characters to… Read More »REGEXP is Case Sensitive?
How to Resolve ERROR 1139 (42000): Got error 'repetition-operator operand invalid' from regexp
ERROR 1139 (42000) In the following example, we'd like to select the city name which are regular-expressly like (rlike or regexp) the string 'New York+',… Read More »How to Resolve ERROR 1139 (42000): Got error 'repetition-operator operand invalid' from regexp
How to Use REGEXP or RLIKE to Select Strings First Positioned or Space Prepended
In this case, I would identify a string (e.g. 'mountain view') which is a leading or white space prepended string and it should be appended… Read More »How to Use REGEXP or RLIKE to Select Strings First Positioned or Space Prepended