CODEWITHSUNDEEP
mysqllinked-listhierarchical-data
mrN
mrN

Reputation: 3770

Mysql: Get all the linked rows in a table

I have a table structure

kinda like this

id  |   title | next 
1   |  test   | 5
2   |  test   | 0
3   |  test   | 0
4   |  test   | 0
5   |  test   | 3

Now, as you see 1 points to next item 5 and 5 points to next item 3 and 3 denotes the end

I need a query, from which I can get 1, 5, 3 serially in one column and their title also

like

result | title
--------------
1      |  test
5      |  test
3      |  test
--------

please help. I dont even know how to get started at such query.

Upvotes: 5

Views: 1252

Answers (3)

Kokos
Kokos

Reputation: 9121

What you want to do here is join the table on itself.

SELECT * FROM `table` AS `child` 
JOIN `table` AS `parent` 
ON `parent`.`next` = `child`.`id`

You need to give both copies of the table their own alias (here: parent and child) because otherwise you will run into uniqueness troubles.

Upvotes: 1

pragmatic
pragmatic

Reputation: 121

One way would be to create a loop that repeats a simple query.. I could post an example here. Are you using PHP?

Upvotes: 0

Frank Schmitt
Frank Schmitt

Reputation: 30815

What you need is a tree query - check Is it possible to query a tree structure table in MySQL in a single query, to any depth?

Upvotes: 1

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