Is it possible to create an inner join between two tables showing all B that contain A? - regex

Question

I have two tables: Kanji, and Vocabulary. Imagine the kanji table looks like this:
目
一
人
And the vocabulary table looks like this:
目的
一番目
一人
二人
人々
注目
目標
一匹
I want to generate a table that finds all vocabulary which contains the kanji in the kanji table and list them together. So the end result would look like this:
人 一人
二人
人々
一 一人
一番目
一匹
目 目的
一番目
注目
目標
I'm not sure how to go about this. If I have just one kanji, I can use the QUERY function to generate all of the vocabularies which contain that one kanji. But can I create a dynamic table which essentially inner joins the "kanji" and "vocabulary" tables, looking for every instance of "vocabulary" contains "kanji"?
I tried using a QUERY to combine the two tables, but it won't work because the tables are mismatched in size:
=QUERY({C1:C296,D1:D224}, "SELECT Col2 WHERE Col1 contains Col2")
In the above example, the C column / Col2 is vocabulary, the D column / Col1 is kanji.
Is there a way to do this using Google Sheets?

Answer 1

The simplest workaround is to get intersections by 1 value:
=FILTER(D:D;REGEXMATCH(D:D;"目"))
The picture shows how to use the copy of this function to get all intersections
The other approach is to use big array-formula like:
=TRANSPOSE(SPLIT(TEXTJOIN(",";1;TRANSPOSE(ARRAYFORMULA(IF(REGEXMATCH(A1:A8;TRANSPOSE(B1:B3));A1:A8;))));","))

Answer 2

=ARRAYFORMULA(SORT(TRIM(SPLIT(TRANSPOSE(SPLIT(QUERY(TRANSPOSE(QUERY(TRANSPOSE(
IF(IFERROR(REGEXEXTRACT(IFERROR(REGEXEXTRACT(C1:C, REPT("(.)", LEN(C1:C)))),
TEXTJOIN("|", 1, A1:A)))<>"", "♦"&IFERROR(REGEXEXTRACT(IFERROR(
REGEXEXTRACT(C1:C, REPT("(.)", LEN(C1:C)))), TEXTJOIN("|", 1, A1:A)))&"♣"&C1:C, ))
,,999^99)),,999^99), "♦")), "♣"))))

Answer 3

seriously, much better way, just add a custom function:
/**
* inner join on equality
*
* #param {Range} items1 Table 1
* #param {Range} items2 Table 2
* #param {Integer} ix1 0-based index of key in Table1
* #param {Integer} ix2 0-based index of key in Table2
*
* #customfunction
* #author marc meyer (marqueymarc)
*/
function innerJoinEQ(items1 = [[]], items2 = [[]], ix1= 0, ix2= 0) {
var res = [];
var item2ix = 0;
var map = new Map();
items1 = Array.isArray(items1)? items1: [[items1]];
items2 = Array.isArray(items2)? items2: [[items2]];
items2.forEach((item2) => {
let entries = map.get(item2[ix2]) || [];
entries.push(item2);
map.set(item2[ix2], entries);
});
items1.forEach((item1) => {
let entries = map.get(item1[ix1]) || [];
entries.forEach((rightPart) => {
let cp = rightPart.slice();
cp.splice(ix2, 1);
res.push([...item1, ...cp]);
})
});
return res;
}