mySQL: How to search in multiple tables in database? - php

Question

I want to search in two tables. Tried this but didn't worked. I'm getting error "Unkown Column...."
HTML:
<form method="post"
<input type="text" name="search_keyword">
<input type="submit" name="button_search">
</form>
MYSQL SELECT AND PHP:
if(isset($_POST['button_search']))
{
$search_keyword = $_POST['search_keyword'];
$select = mysql_query("SELECT * from table_1 WHERE match(name_1) against ($search_keyword)
union all SELECT * from table_2 WHERE match(name_2) against ($search_keyword)");
while($row = mysql_fetch_array($select))
{
echo $row['question'];
echo $row['category_name'];
}
}
TABLES:
For example:
Table 1:
table name: table_1
Values (table 1):
+-------+-------------+
| id_1 | name_1 |
+-------+-------------+
| 1 | Phinoy |
| 2 | Go |
+-------+-------------+
Table 2:
table name: table_2
Values:
+-------+-------------+
| id_2 | name_2 |
+-------+-------------+
| 1 | Gi |
| 2 | Phinas |
+-------+-------------+
If I search "P" or "Ph" , it will show the values "Phinoy and Phinas".

Answer 1

Well. First you need is use an INNER JOIN for comparing two tables at the same time. In this code, we are concatening the result of the table 1 and the table 2, then we are calling the table_1 and with a INNER JOIN we will compare the table_2 if in the table_1 there are any result LIKE table_2 and only just happening in the column name_1 and name_2.
<?php
$query = "SELECT
CONCAT(table_1.name_1,' and ',table_2.name_2)
FROM table_1 INNER JOIN table_2
ON table_1.name_1 LIKE table_2.name_2";
mysql_query($query);
?>