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The REPLACE function is very handy to search and replace text in a table such as updating obsolete URL, correcting a spelling mistake, etc. UPDATE tbl_name SET field_name = REPLACE(field_name, string_to_find, string_to_replace) WHERE conditions;
Jun 12, 2009 · 12.5.2 Regular Expressions: REGEXP_REPLACE(expr, pat, repl[, pos[, occurrence[, match_type]]]) Replaces occurrences in the string expr that match the regular expression specified by the pattern pat with the replacement string repl, and returns the resulting string. If expr, pat, or repl is NULL, the return value is NULL.
Jan 10, 2017 · I'm trying to replace a bunch of characters in a MySQL field. I know the REPLACE function but that only replaces one string at a time. I can't see any appropriate functions in the manual. Can I replace or delete multiple strings at once? For example I need to replace spaces with dashes and remove other punctuation.
Case-insensitive REPLACE in MySQL? 2. MYSQL query to update for date field. 0.
Aug 20, 2010 · SELECT IFNULL(column_name, 0) FROM table_name; IFNULL will return column's value (if it has something other than NULL) otherwise second parameter passed (in this case 0). answered Jun 15, 2014 at 5:55. Arif. 1,706 3 21 34. This only really selects and replaces, rather than truly updating the table. – tedioustortoise.
May 4, 2017 · SET example = REPLACE(example, '1', 'test') WHERE example REGEXP '1$'. So this code replaces all instances of "1" in the "example" field with "test". I want to repeat this for 2, 3, 4 and so on. But it would be very inefficient to use separate querys.
Aug 11, 2008 · Then you repeat ( [0-9]+)\t as often as there are columns that you just want to leave as they are. ( [0-9]+), ( [0-9]+) searches for values where there is a number, then a comma and then another number. In the replace string we use \1 and \2 to just keep the values from the edited line, separating them with \t (tab).
For new line characters. UPDATE table_name SET field_name = TRIM(TRAILING '\n' FROM field_name); UPDATE table_name SET field_name = TRIM(TRAILING '\r' FROM field_name); UPDATE table_name SET field_name = TRIM(TRAILING '\r\n' FROM field_name);
Aug 7, 2012 · The easiest way I have found is to dump the database to a text file, run a sed command to do the replace, and reload the database back into MySQL. All commands below are bash on Linux. Dump database to text file. mysqldump -u user -p databasename > ./db.sql. Run sed command to find/replace target string.
Jun 28, 2013 · You don't need wildcards in the REPLACE - it just finds the string you enter for the second argument, so the following should work: UPDATE dbo.xxx. SET Value = REPLACE(Value, '123', '') WHERE ID <=4. If the column to replace is type text or ntext you need to cast it to nvarchar. UPDATE dbo.xxx.
