mysql get table based on common column between two tables
- by Zentdayn
while trying to learn sql i came across "Learn SQL The Hard Way" and i started reading it.
Everything was going fine then i thought ,as a way to practice, to make something like given example in the book (example consists in 3 tables pet,person,person_pet and the person_pet table 'links' pets to their owners).
I made this:
report table
+----+-------------+
| id | content |
+----+-------------+
| 1 | bank robbery|
| 2 | invalid |
| 3 | cat on tree |
+----+-------------+
notes table
+-----------+--------------------+
| report_id | content |
+-----------+--------------------+
| 1 | they had guns |
| 3 | cat was saved |
+-----------+--------------------+
wanted result
+-----------+--------------------+---------------+
| report_id | report_content | report_notes |
+-----------+--------------------+---------------+
| 1 | bank robbery | they had guns |
| 2 | invalid | null or '' |
| 3 | cat on tree | cat was saved |
+-----------+--------------------+---------------+
I tried a few combinations but no success.
My first thought was
SELECT report.id,report.content AS report_content,note.content AS note_content
FROM report,note
WHERE report.id = note.report_id
but this only returns the ones that have a match (would not return the invalid report).
after this i tried adding IF conditions but i just made it worse.
My question is, is this something i will figure out after getting past basic sql
or can this be done in simple way?
Anyway i would appreciate any help, i pretty much lost with this.
Thank you.
EDIT: i have looked into related questions but havent yet found one that solves my problem.
I probably need to look into other statements such as join or something to sort this out.
