Question
What is the usage of regular expressions in mysql?
Answers
In MySQL, regular expressions are used in queries for searching a pattern in a string.

* Matches 0 more instances of the string preceding it.
+ matches 1 more instances of the string preceding it.
? Matches 0 or 1 instances of the string preceding it.
. Matches a single character.
[abc] matches a or b or z
| separates strings
^ anchors the match from the start.
"." Can be used to match any single character. "|" can be used to match either of the two strings
REGEXP can be used to match the input characters with the database.

Example:
The following statement retrieves all rows where column employee_name contains the text 1000 (example salary):

Select employee_name
From employee
Where employee_name REGEXP '1000'
Order by employee_name   Your Comment




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