I have three different tables, let's name them as
table1, table2, table3
But in these different tables, I have the same number of columns and also the same name. For example,
Table 1 columns: id, title, category, subcategory, image
Table 2 columns: id, title, category, subcategory, image
Table 3 columns: id, title, category, subcategory, image
How can I fetch all those 3 tables using a single foreach?
function post_details(){
global $db;
$query = "SELECT * FROM posts WHERE status = 'Active' ORDER BY id DESC";
$run_query = mysqli_query($db, $query);
$post_details = mysqli_fetch_all($run_query, MYSQLI_ASSOC);
$getdetails = array();
foreach ($post_details as $post_detail) {
array_push($getdetails, $post_detail);
}
return $getdetails;
}
if you page shows blank,add this on top of php file
//if error happend,this will display error on page
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
you can usemysql union
if you want simple loop the rows
function post_details(){
global $db;
$query = "SELECT * FROM posts1 WHERE status = 'Active' ORDER BY id DESC";
$query .= " UNION SELECT * FROM posts2 WHERE status = 'Active' ORDER BY id DESC";
$query .= " UNION SELECT * FROM posts3 WHERE status = 'Active' ORDER BY id DESC";
$run_query = mysqli_query($db, $query);
$post_details = mysqli_fetch_all($run_query, MYSQLI_ASSOC);
$getdetails = array();
foreach ($post_details as $post_detail) {
array_push($getdetails, $post_detail);
}
return $getdetails;
}
if you want order by all table you can use temporary table like this,be careful of this,it could be slow in large dataset,due to it sort on temporary table.
$query = "SELECT * FROM
(SELECT * FROM posts1 WHERE status = 'Active'
UNION SELECT * FROM posts2 WHERE status = 'Active'
UNION SELECT * FROM posts3 WHERE status = 'Active')
AS t1 ORDER BY id DESC";
Actually when we want to fetch records from the multiple table with the same columns or from the same table and different conditions, then we need to use UNION to merge all those records in the same SQL Query so please use this query and replace the table name with your real table names.
$query = "SELECT * FROM ( ( SELECT * FROM table1 WHERE status = 'Active' ORDER BY id DESC )
UNION
( SELECT * FROM table2 WHERE status = 'Active' ORDER BY id DESC )
UNION
( SELECT * FROM table2 WHERE status = 'Active' ORDER BY id DESC ) ) as tempdata";
Our community is visited by hundreds of web development professionals every day. Ask your question and get a quick answer for free.
Find the answer in similar questions on our website.
Do you know the answer to this question? Write a quick response to it. With your help, we will make our community stronger.
PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/
DBMS is a database management system. It is designed to change, search, add and delete information in the database. There are many DBMSs designed for similar purposes with different features. One of the most popular is MySQL.
It is a software tool designed to work with relational SQL databases. It is easy to learn even for site owners who are not professional programmers or administrators. MySQL DBMS also allows you to export and import data, which is convenient when moving large amounts of information.
https://www.mysql.com/
Welcome to the Q&A site for web developers. Here you can ask a question about the problem you are facing and get answers from other experts. We have created a user-friendly interface so that you can quickly and free of charge ask a question about a web programming problem. We also invite other experts to join our community and help other members who ask questions. In addition, you can use our search for questions with a solution.
Ask about the real problem you are facing. Describe in detail what you are doing and what you want to achieve.
Our goal is to create a strong community in which everyone will support each other. If you find a question and know the answer to it, help others with your knowledge.