Split comma delimited string --> FUNCTION db.CHARINDEX does not exist

Question

I need to split comma delimited string into a second columns I have the following table :

CL1     POS                 POS2     LENGHT     ALLELE
1       301         


        

Answer 1

MySQL doesn't have a built-in CHARINDEX() function. LOCATE() would be the MySQL equivalent.

Using SUBSTRING_INDEX() might be a more succinct way of doing this. Something like this (disclaimer: untested):

SUBSTRING_INDEX(POS, ',', 1) for POS

SUBSTRING_INDEX(POS, ',', -1) for POS2

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As an aside, I may be misunderstanding what you're trying to accomplish, but it looks like you might want to UPDATE existing rows, not INSERT new ones? Something like:

UPDATE MyTable SET POS2 = SUBSTRING_INDEX(POS, ',', -1);
UPDATE MyTable SET POS = SUBSTRING_INDEX(POS, ',', 1);

Answer 2

MySQL does have a similar function: InStr or for the same syntax Locate.