What does the sql split() method do?

Split() method is not built-in SQL. Split() method is a common string processing method in some programming languages that divides a string into an array of strings based on a specified delimiter.

If you want to achieve similar functionality in SQL, you can use some built-in functions such as SUBSTRING_INDEX() or REGEXP_SUBSTR() to split and extract strings.

1. The function SUBSTRING_INDEX(str, delimiter, count) returns all characters in the string str that appear before (or after) the specified delimiter for the count-th occurrence.
2. REGEXP_SUBSTR(str, pattern): This function searches for matching substrings in the string str based on the regular expression pattern.

These functions can assist you in performing string splitting operations, but they need to be adjusted and used according to the specific database system and syntax.