Split single row value to multiple rows in Snowflake - sql

Question

I have a table where the column data has a combination of values seperated by ';'. I would like to split them into rows for each column value.
Table data
Now I would like to split them into multiple rows for each value like
I have tried using the below SQL statement.
SELECT DISTINCT COL_NAME FROM "DB"."SCHEMA"."TABLE,
LATERAL FLATTEN(INPUT=>SPLIT(COL_NAME,';'))
But the output is not as expected. Attaching the query output below.
Basically the query does nothing to my data.

Answer 1

It could be achieved using SPLIT_TO_TABLE table function:
This table function splits a string (based on a specified delimiter) and flattens the results into rows.
SELECT *
FROM tab, LATERAL SPLIT_TO_TABLE(column_name, ';')

Answer 2

I was able to resolve this by using LATERAL FLATTERN like a joining table and selecting the value from it.
SELECT DISTINCT A.VALUE AS COL_NAME
FROM "DB"."SCHEMA"."TABLE",
LATERAL SPLIT_TO_TABLE(COL_NAME,';')A

Answer 3

Looks your data has multiple delimiters , We can leverage STRTOK_SPLIT_TO_TABLE function using multiple delimiters..
STRTOK_SPLIT_TO_TABLE
WITH data AS (
SELECT *
FROM VALUES
('Greensboro-High Point-Winston-Salem;Norfolk-Portsmouth-Newport News Washington, D.C. Roanoke-Lynchburg Richmond-Petersburg')
v( cities))
select *
from data, lateral strtok_split_to_table(cities, ';-')
order by seq, index;
Result:

Answer 4

Your first attempt was very close, you just need to access the out of the flatten, instead of the input to the flatten
so using this CTE for data:
WITH fake_data AS (
SELECT *
FROM VALUES
('Greensboro-High Point-Winston-Salem;Norfolk-Portsmouth-Newport News;Washington, D.C.;Roanoke-Lynchburg;Richmond-Petersburg'),
('Knoxville'),
('Knoxville;Memphis;Nashville')
v( COL_NAME)
)
if you had aliased you tables, and accessed the parts.
SELECT DISTINCT f.value::text as col_name
FROM fake_data d,
LATERAL FLATTEN(INPUT=>SPLIT(COL_NAME,';')) f
;
which is what you did in your provided answer, but via SPLIT_TO_TABLE
SELECT DISTINCT f.value as col_name
FROM fake_data d,
TABLE(SPLIT_TO_TABLE(COL_NAME,';')) f
;
STRTOK_SPLIT_TO_TABLE also is the same thing:
SELECT DISTINCT f.value as col_name
FROM fake_data d,
TABLE(strtok_split_to_table(COL_NAME,';')) f
;
Which can also be done via a strtok_to_array and FLATTEN that
SELECT DISTINCT f.value as col_name
FROM fake_data d,
TABLE(FLATTEN(input=>STRTOK_TO_ARRAY(COL_NAME,';'))) f
;
COL_NAME
Greensboro-High Point-Winston-Salem
Norfolk-Portsmouth-Newport News
Washington, D.C.
Roanoke-Lynchburg
Richmond-Petersburg
Knoxville
Memphis
Nashville