Is there a version of 'CONTAINS' function in SQLITE other than 'LIKE'? - sql

Question

I'm trying to find totals for each number in the range of 1 to 7. But the data contains different combinations of these numbers. For e.g. 1; 2; 3,7; 1,2,3 and so on. I want to find the total number of times each number pops up. What I essentially want is a code for SQLite that's goes like:
select <fields>, count(*)
from tablexyz
where <field> contains '2' (and '3','4',... individually)
When I input "where like '2%'" and such, it only gives me all series that start with 2 but negates series that starts with 1 but contains 2.
Any help would be appreciated!

Answer 1

I want to find the total number of times each number pops up
Your sample code and the solution you say you want don't exactly align. The closest I can think of is
with t (txt) as -- a sample record from your table
(select '1; 2; 3,7; 1,2,3'),
t2 (num) as -- a lookup table we can create for range of numbers 1-7
(select 1 union all
select 2 union all
select 3 union all
select 4 union all
select 5 union all
select 6 union all
select 7)
select t2.num, length(t.txt) - length(replace(t.txt,t2.num,'')) as num_occurence
from t2
left join t on t.txt like '%' || t2.num || '%'
Outputs
+-----+---------------+
| num | num_occurence |
+-----+---------------+
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | NULL |
| 5 | NULL |
| 6 | NULL |
| 7 | 1 |
+-----+---------------+
Demo

Answer 2

Using the solution below, you can build a "table" of the numbers 1 to 7, then join it to your source data table to count if the number occurs in that row, then sum it together.
Query
WITH
sample_data (nums)
AS
(SELECT '1,2,3,4,5,6'
UNION ALL
SELECT '3,4,5,6'
UNION ALL
SELECT '1,2,7,6'
UNION ALL
SELECT '6' ),
search_nums (search_num)
AS
(VALUES(1)
UNION ALL
SELECT search_num+1 FROM search_nums WHERE search_num<7)
select search_num, sum(count_of_num) from (
SELECT s.nums,
n.search_num,
case
instr(s.nums, n.search_num)
when 0 then 0
else 1
end as count_of_num
FROM sample_data s, search_nums n
) group by search_num;
Result
search_num sum(count_of_num)
1 2
2 2
3 2
4 2
5 2
6 4
7 1