Question

I have a field that contains data like below:

124.97#54.03#5#16

its number which separated by ‘#’. I want to sum these number, but not get the result yet.

First I use this query to replace ‘#’ with ‘+’ sign.

select replace(myfieldname,'#','+') from mytable

I imagine if there’s a function ‘eval’ like in PHP, it should be done.

Any ideas? Thanks in advance.

Note: It’s ok if you can help me to separate that single column to multiple column in result, actually that’s better.

Answer 1

>
Note: It’s ok if you can help me to separate that single column to multiple column in result, actually that’s better.

Try this query –

SELECT
  SUBSTRING_INDEX(column1, '#', 1) v1,
  SUBSTRING_INDEX(SUBSTRING_INDEX(column1, '#', 2), '#', -1) v2,
  SUBSTRING_INDEX(SUBSTRING_INDEX(column1, '#', 3), '#', -1) v3
  ...
  ...
  ...
FROM table_name;

Another variant:

SET @values = '124.97#54.03#5#16';
SET @values = REPLACE(@values, '#', '+');
SET @select = CONCAT('SELECT ', @values);

PREPARE stmt FROM @select;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;