MYSQL double table search with variables in query - php

Question

Hi i want to acheive the following results for the purpose of a search script in php
i have 2 tables like this
Table 1 :
-----------------------------
id l name l url l image url l
-------------------------------
Table 2 :
-----------------------------------
id l tableoneid l desc l content l
------------------------------------
Note : (Table 1 --> id) = (Table 2 ---> tableoneid)
what i want to acheive is to get a MYSQL query that search :
Step 1 : The table 2 column [content] when i get the result i need
their [tableoneid] values,
Step 2 : Next i want to use that in order to search the Table 1 column 1
Step 3 : The final results would be the corresponding [image url] column of the Step 2 results
how can i acheive that with php/mysql
thank you very much !

Answer 1

Something like this:
SELECT * FROM <Table 1>
WHERE id IN (
SELECT DISTINCT(tableoneid) FROM <Table 2>
)
Change <Table 1> and <Table 2> with your actual table names.

Answer 2

This is one of the primary uses of JOINs.
SELECT t1.`image url`
FROM `Table 2` AS t2
INNER JOIN `Table 1` AS t1 ON t2.tableoneid = t1.id
WHERE [some condition involving t1.content]
;
I would strongly suggest not having any sort of non-alpha characters (other than _ in your table and field names.)

Answer 3

$query = "select
t1.`image url`
from
`Table 1` as t1
join
`Table 2` as t2 on t1.id = t2.tableoneid
where
t2.content = :table2ContentSearch";
$statement = $dbh->prepare($query);
$searchItem = "what you are searching for";
$statement->bindParam(':table2ContentSearch', $searchItem);
if($statement->execute()){
while($row = $statement->fetch()){
print_r($row);
}
}
you should also read up on sql joins. https://en.wikipedia.org/wiki/Join_%28SQL%29.