Rakesh Jesadiya

You can run a direct SQL query for fetching only first value using fetchOne() method.

fetchOne() Fetches the first column of the first row of the SQL result as output.

You can use direct SQL query for the fetch the first column of the first row using below way, Get Product id by Product SKU,

<?php
class UpdateQuery {
   public function __construct(
       \Magento\Framework\App\ResourceConnection $resource
   ) {
       $this->resource = $resource;
   }

   /**
    * Update Sql Query
    */
   public function runUpdateQuery()
   {
      $connection  = $this->resource->getConnection();
      $tableName = $connection->getTableName("catalog_product_entity");
      
      $select = $connection->select()->from($tableName, 'entity_id')->where('sku = :sku');
      $sku = "24-MB01";
      $bind = [':sku' => (string)$sku];

      return (int)$connection->fetchOne($select, $bind);
  }
}

Output is 1. //entity_id for SKU 24-MB01

Check for other Direct SQL Query in Magento 2

Run Update SQL query in a given database table by Magento 2 in a standard way without the use of Object Manager.

You can write an update MySQL query in the ResouceModel PHP class.

When you write any custom update query, You need to create a function in the ResourceModel folder PHP file.

You can encode and decode the URL using Magento 2 with native functionality.

Using Url Encode, they encode the base64_encode() for URLs encoding using encode() function.

Using Url Decode, they decode the base64_decode() for URLs decoding.