How To Use Comma Separated Values In Mysql

B using string split function to split a comma separated string in a column.

How to use comma separated values in mysql. For example if you have following resultset and if you want each of the value of the comma separated string from the last column in a separate row previously you had to use a very complicated function on the column which was a performance killer. A typical example of this is when a column can store multiple values separated by a comma. Split comma separated values and retrieve a value at certain position. In the first example output it searches value 2 in userid and returns all rows which have search value but in the second example where using in function. While it s true that you could achieve this same effect prior to sql server 2017 it was a bit fiddly.

Mysql users however are in the dark. Lets split the comma separated phone number list into columns for this we will use cross apply operator string split function and sql pivot. The string split can help normalize the data by splitting these multi valued columns. Following query is used for splitting a comma separated phone number list into columns. Surprisingly mysql doesn t have a dedicated function for this operations as opposed to split part in postgresql.

Starting with sql server 2017 you can now make your query results appear as a list. It only returns those rows where it finds search value in first place. In this post we ll show how to split our comma separated string into a table of values for easier analysis in mysql. Columns phn1 phn2 phn3 phn4 will be having a phone number values. Luckily it has substring index function that does almost what we need.

For converting a comma separated value to rows i have written a user defined function to return a table with values in rows. Sometimes database tables are not normalized. In the above example using both find in set and in function in where clause for find value 2 in userid column which contains comma separated ids. This means you can have your result set appear as a comma separated list a space separated list or whatever separator you choose to use. We will learn today how to split comma separated value string in a column using string split.

It takes comma separated values as the input parameter iterates through it as long as it finds a comma in the value takes each value before the comma inserts into a table and finally returns the inserted data from. Where each number represents the available colors. Making a table of numbers.