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Essentially, I have a table called Table1 that has a column called emails that contains email addresses separated by semicolons.

For example:

Row1:

[email protected]; [email protected]

Row2:

[email protected]; [email protected]; [email protected]

I would like to do a select query on the table to display each email on its own row each time the a semicolon is there to split. How can this be done?

John
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  • Don't put more that one value in a column for a single row. This isn't the way SQL can work easily. Use a separate table and a JOIN. So its currently not possible in its current form. – danblack Jun 20 '21 at 23:27
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    Normalize your schema in the first place. See ["Is storing a delimited list in a database column really that bad?"](https://stackoverflow.com/questions/3653462/is-storing-a-delimited-list-in-a-database-column-really-that-bad) (Spoiler: Yes, it is.). – sticky bit Jun 20 '21 at 23:28
  • I understand, is there a way to use temp tables in the query to split up the data? – John Jun 20 '21 at 23:30
  • look for splitting string functions – nbk Jun 20 '21 at 23:33
  • You can find many posts on Stack Overflow with the search terms: "split string into rows" or similar. I voted to mark this question as a duplicate, after I found one such post that had a good variety of different solutions. None of them are very convenient or elegant. It's better to store your data using one row per value, as other people have commented. – Bill Karwin Jun 20 '21 at 23:42
  • with mysql 8+ or mariadb 10.2+: https://dbfiddle.uk/?rdbms=mariadb_10.5&fiddle=4336e33289d44baf75333f6097554702 with earlier versions, you can use subqueries and joins but ideally need to know some maximum number of things that will need to be split – ysth Jun 21 '21 at 02:21

1 Answers1

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its better to make an array or array of object and save data like..

[[email protected], [email protected], ...]
[{email: [email protected]}, {email: [email protected]}]

in that way you can easily get data by using query or by any programming language you are working on.

Hasham Siddiqui
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