Running Raw Queries in CodeIgniter 4 Tutorial

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Inside this article we will see the concept of running raw queries. Raw query means running direct sql query of insert, update, delete etc commands.

Query execution in raw format probably is not a good approach. But in some cases where we need, you can use it. While using raw queries we also have the query binding concept which we can use as a type of placeholder for the values.

Query binding in CodeIgniter 4 includes the concept of placeholders for values and named binding.

This tutorial will provide you the complete concept of running raw queries in codeigniter 4.

Learn more –

  • Methods of Query Builder In CodeIgniter 4 Tutorial, Click here.
  • Working with Model in CodeIgniter 4 Tutorial, Click here.

Note*: For this article, CodeIgniter v4.1 setup has been installed. May be when you are seeing, version will be updated. CodeIgniter 4.x still is in development mode.

Let’s get started.


Download & Install CodeIgniter 4 Setup

We need to download & install CodeIgniter 4 application setup to system. To set application we have multiple options to proceed.

Here are the following ways to download and install CodeIgniter 4 –

  • Manual Download
  • Composer Installation
  • Clone Github repository of CodeIgniter 4

Complete introduction of CodeIgniter 4 basics – Click here to go. After going through this article you can easily download & install setup.

Here is the command to install via composer –

$ composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.


Turn Development Mode On

When we install CodeIgniter 4, we have env file at root. To use the environment variables means using variables at global scope we need to do env to .env

Open project in terminal

$ cp env .env

Above command will create a copy of env file to .env file. Now we are ready to use environment variables.

CodeIgniter starts up in production mode by default. Let’s do it in development mode. So that while working if we get any error then error will show up.

# CI_ENVIRONMENT = production

// Do it to 

CI_ENVIRONMENT = development

Now application is in development mode.


Syntax for Raw Query Method

Use query() method of CodeIgniter 4.

$db = db_connect();

OR 

$db = \Config\Database::connect();

It will connect with default connection group of application. Now, by using $db we can write and run queries. You can write it into constructor method.

$db->query("<YOUR QUERY HERE>");

Raw Query – Insert Method

Need to use mysql insert query.

Syntax #1

$insertQuery = "INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, value3, ...)";

$db->query($insertQuery);

Example

$insertQuery = "INSERT INTO users (name, email, phone_no) VALUES ('Sanjay', 'sanjay@gmail.com', '2222222222')";

 if ($this->db->query($insertQuery)) {

        echo "DATA SAVED";
 }else{

        echo "FAILED TO SAVE DATA";
 }

Next, we will use the concept of Query Binding in CodeIgniter 4.

Syntax #2

$insertQuery = "INSERT INTO table_name (column1, column2, ...) VALUES (?, ?, ?, ...)";

$db->query($insertQuery, [value1, value2, value3, ...]);

Example

$insertQuery = "INSERT INTO users (name, email, phone_no) VALUES ( ?,  ? , ? )";

 if ($this->db->query($insertQuery, ['Sanjay', 'sanjay@gmail.com', '2222222222'])) {

        echo "DATA SAVED";
 }else{

        echo "FAILED TO SAVE DATA";
 }

Named Query Binding in CodeIgniter 4

Syntax #3

$insertQuery = "INSERT INTO table_name (column1, column2, ...) VALUES (:val1: , :val2: , :val3: , ...)";

$db->query($insertQuery, ["val1" => value1, "val2" => value2, "val3" => value3, ...]);

Example

$insertQuery = "INSERT INTO users (name, email, phone_no) VALUES ( :name:,  :email: , :mobile: )";

 if ($this->db->query($insertQuery, [
     "name" => 'Sanjay', 
     "email" =>  'sanjay@gmail.com', 
     "mobile" => '2222222222'
])) {

        echo "DATA SAVED";
 }else{

        echo "FAILED TO SAVE DATA";
 }

Here, we have seen the complete Idea of raw query of Insert operation. You can use the same concept with Select, Update, Delete.


Raw Query – Select Method

There are some select methods in CodeIgniter 4, which we need to use while adding select raw queries to get data.

$db->query("<YOUR QUERY HERE>");

Select Methods of CodeIgniter 4

We have few methods provided to fetch data.

  • getResult()
  • getResult(‘array’)
  • getResultArray()
  • getRow()

getResult() It returns data set into object form.

getResult(‘array’) & getResultArray() It returns data set into array form.

getRow() It returns a single specific row.

How to Use

$db->query("<YOUR SELECT QUERY HERE>")->getResult();

$db->query("<YOUR SELECT QUERY HERE>")->getResultArray();

$db->query("<YOUR SELECT QUERY HERE>")->getRow();

We hope this article helped you to learn about Running Raw Queries in CodeIgniter 4 Tutorial in a very detailed way.

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