Mysql regex replace

REGEXP_REPLACE(expression, pattern, replacement[, position[, occurrence[, match_type]]])

Example 1 - remove all "-" characters
SELECT REGEXP_REPLACE( fieldname, '-', '' ) AS newfieldname FROM tablename

Source: database.guide

Mysql regexp replace

WITH t AS (SELECT 'aaa <b>bbb</b> ccc' AS teststring FROM dual)

SELECT
  teststring,
  regexp_replace(teststring, '<.+>') AS reg1,
  regexp_replace(teststring, '<.*>') AS reg2,
  regexp_replace(teststring, '<.*?>') AS reg3
FROM t


TESTSTRING             REG1        REG2          REG3
aaa <b>bbb</b> ccc     aaa ccc     aaa ccc       aaa bbb ccc

Source: stackoverflow.com

Mysql replace regex

DELIMITER $$

CREATE FUNCTION  `regex_replace`(pattern VARCHAR(1000),replacement VARCHAR(1000),original VARCHAR(1000))
RETURNS VARCHAR(1000)
DETERMINISTIC
BEGIN 
 DECLARE temp VARCHAR(1000); 
 DECLARE ch VARCHAR(1); 
 DECLARE i INT;
 SET i = 1;
 SET temp = '';
 IF original REGEXP pattern THEN 
  loop_label: LOOP 
   IF i>CHAR_LENGTH(original) THEN
    LEAVE loop_label;  
   END IF;
   SET ch = SUBSTRING(original,i,1);
   IF NOT ch REGEXP pattern THEN
    SET temp = CONCAT(temp,ch);
   ELSE
    SET temp = CONCAT(temp,replacement);
   END IF;
   SET i=i+1;
  END LOOP;
 ELSE
  SET temp = original;
 END IF;
 RETURN temp;
END$$

DELIMITER ;

Source: stackoverflow.com

Similar codes

0 vote189 views2 answers
Database owner can't create new tables postgres
SQL
0 vote208 views1 answer
Savepoint mysql script
SQL
0 vote195 views1 answer
Multiple left join mysql
SQL
3 votes213 views3 answers
Start postgresql ubuntu
SQL
0 vote184 views2 answers
Postgres default user
SQL
0 vote233 views1 answer
Sql select rows with different values in one column
SQL
0 vote204 views1 answer
Postgresql create table with boolean column
SQL
2 votes243 views1 answer
Mysql trigger after update
SQL
0 vote182 views1 answer
Clear query cache sql server
SQL
34 votes236 views6 answers
Install mysql client ubuntu
SQL