How to build a search app with node js and mysql [duplicate] - mysql

Question

I have three tables in my database which are:
messages
topics
comments
Each of these tables has two fields called 'content' and 'title'. I want to be able to use 'Like' in my sql statement to look at 'messages.content', 'messages.title', 'topics.content', 'topics.title', 'comments.content' and 'comments.title' using a keyword.
So far, my query is able to find results from only one table:
mysql_query("SELECT * FROM messages
WHERE content LIKE '%" . $keyword . "%'
OR title LIKE '%" . $keyword ."%'");
I am also wondering, once I get the results from multiple tables, how can I tell what result is from what table?
Any help would be greatly appreciated!

Answer 1

$query = "(SELECT content, title, 'msg' as type FROM messages WHERE content LIKE '%" .
$keyword . "%' OR title LIKE '%" . $keyword ."%')
UNION
(SELECT content, title, 'topic' as type FROM topics WHERE content LIKE '%" .
$keyword . "%' OR title LIKE '%" . $keyword ."%')
UNION
(SELECT content, title, 'comment' as type FROM comments WHERE content LIKE '%" .
$keyword . "%' OR title LIKE '%" . $keyword ."%')";
mysql_query($query);
So, you are getting result from all of the three tables, and you can identify which row came from which table by looking at its type value.

Answer 2

What you are probably looking for is the UNION command:
SELECT id, 'messages' as 'table' FROM messages
WHERE content LIKE '%keyword%'
OR title LIKE '%keyword%'
UNION
SELECT id, 'topics' as 'table' FROM topics
WHERE content LIKE '%keyword%'
OR title LIKE '%keyword%'
UNION
SELECT id, 'comments' as 'table' FROM comments
WHERE content LIKE '%keyword%'
OR title LIKE '%keyword%'

Answer 3

Two search in other tables you use:
SELECT `categories`.`title`, `posts`.`title` WHERE `categories`.`title` LIKE {$a} OR `posts`.`title` LIKE {$a}
The CATEGORIES and POSTS are tables of your database.

Answer 4

Html Search form:
<div class="header_top_right">
<form action="search.php" method="GET" class="search_form">
<input type="text" placeholder="Text to Search.." name="search">
<input type="submit" class="btn btn-default" value="">
</form>
</div>
Search.php:
<?php
if (isset($_GET['search']) || !empty($_GET['search'])) {
$search = mysqli_real_escape_string($db->link, $fm->validation($_GET['search']));
}
else{
header("Location:404.php");
}
?>
<?php
$query = "SELECT * FROM news_post WHERE title LIKE '%$search%' OR body LIKE '%$search%' OR tags LIKE '%search%'";
$post = $db->select($query);
if ($post) {
while ($result = $post->fetch_assoc()) {
echo"Database data like, $result['title']";
}
}
else{
echo "result Not found";
}
include database.php in search.php
class Database{
public function select($query){
$result = $this->link->query($query) or die($this->link->error.__LINE__);
if($result->num_rows > 0){
return $result;
}
else {
return false;
}
}
}
$db = new Database();