Desmond  Gerber

Desmond Gerber

1623647371

Update Multiple Rows in SQL with Different Values At once

Did you ever have a problem that you needed to update multiple rows in database, with different values? I did, and it gave me a little headache. I will show you here, how to efficiently solve this problem in NodeJS.

Image that you have a lot of entries in database. Like a million and then some. But you want to change each field to different value (lets say that you want to encrypt first name). How will you do that in NodeJS? Well, one solution is to do it one by one, but that is not efficient and it will take a lot of time. But we can try. Lets use knex for this issue

knex.transaction(function(trx) {
    knex('users')
        .transactiong(trx)
        .select('id')
        .select('firstName')
        .then(async function(res) {
            for (let i = 0; i < res.length; i++) {
                const userData = res[i]; //here we have id and firstName
                const encryptedFirstName = encrypt(userData.firstName);
trx('users')
                    .where('id', '=', userData.id)
                    .update({
                        firstName: encryptedFirstName
                    })
            }
        })
        .then(function() {
           trx.commit();
           process.exit(0);
        })
        .catch(function(err) {
           trx.rollback();
           process.exit(1);
        })
});

#nodejs #sql #knex #database #node

What is GEEK

Buddha Community

Update Multiple Rows in SQL with Different Values At once
Cayla  Erdman

Cayla Erdman

1594369800

Introduction to Structured Query Language SQL pdf

SQL stands for Structured Query Language. SQL is a scripting language expected to store, control, and inquiry information put away in social databases. The main manifestation of SQL showed up in 1974, when a gathering in IBM built up the principal model of a social database. The primary business social database was discharged by Relational Software later turning out to be Oracle.

Models for SQL exist. In any case, the SQL that can be utilized on every last one of the major RDBMS today is in various flavors. This is because of two reasons:

1. The SQL order standard is genuinely intricate, and it isn’t handy to actualize the whole standard.

2. Every database seller needs an approach to separate its item from others.

Right now, contrasts are noted where fitting.

#programming books #beginning sql pdf #commands sql #download free sql full book pdf #introduction to sql pdf #introduction to sql ppt #introduction to sql #practical sql pdf #sql commands pdf with examples free download #sql commands #sql free bool download #sql guide #sql language #sql pdf #sql ppt #sql programming language #sql tutorial for beginners #sql tutorial pdf #sql #structured query language pdf #structured query language ppt #structured query language

Seamus  Quitzon

Seamus Quitzon

1595201363

Php how to delete multiple rows through checkbox using ajax in laravel

First thing, we will need a table and i am creating products table for this example. So run the following query to create table.

CREATE TABLE `products` (
 `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
 `description` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
 `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
 `updated_at` datetime DEFAULT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

Next, we will need to insert some dummy records in this table that will be deleted.

INSERT INTO `products` (`name`, `description`) VALUES

('Test product 1', 'Product description example1'),

('Test product 2', 'Product description example2'),

('Test product 3', 'Product description example3'),

('Test product 4', 'Product description example4'),

('Test product 5', 'Product description example5');

Now we are redy to create a model corresponding to this products table. Here we will create Product model. So let’s create a model file Product.php file under app directory and put the code below.

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product extends Model
{
    protected $fillable = [
        'name','description'
    ];
}

Step 2: Create Route

Now, in this second step we will create some routes to handle the request for this example. So opeen routes/web.php file and copy the routes as given below.

routes/web.php

Route::get('product', 'ProductController@index');
Route::delete('product/{id}', ['as'=>'product.destroy','uses'=>'ProductController@destroy']);
Route::delete('delete-multiple-product', ['as'=>'product.multiple-delete','uses'=>'ProductController@deleteMultiple']);

#laravel #delete multiple rows in laravel using ajax #laravel ajax delete #laravel ajax multiple checkbox delete #laravel delete multiple rows #laravel delete records using ajax #laravel multiple checkbox delete rows #laravel multiple delete

Cayla  Erdman

Cayla Erdman

1596441660

Welcome Back the T-SQL Debugger with SQL Complete – SQL Debugger

When you develop large chunks of T-SQL code with the help of the SQL Server Management Studio tool, it is essential to test the “Live” behavior of your code by making sure that each small piece of code works fine and being able to allocate any error message that may cause a failure within that code.

The easiest way to perform that would be to use the T-SQL debugger feature, which used to be built-in over the SQL Server Management Studio tool. But since the T-SQL debugger feature was removed completely from SQL Server Management Studio 18 and later editions, we need a replacement for that feature. This is because we cannot keep using the old versions of SSMS just to support the T-SQL Debugger feature without “enjoying” the new features and bug fixes that are released in the new SSMS versions.

If you plan to wait for SSMS to bring back the T-SQL Debugger feature, vote in the Put Debugger back into SSMS 18 to ask Microsoft to reintroduce it.

As for me, I searched for an alternative tool for a T-SQL Debugger SSMS built-in feature and found that Devart company rolled out a new T-SQL Debugger feature to version 6.4 of SQL – Complete tool. SQL Complete is an add-in for Visual Studio and SSMS that offers scripts autocompletion capabilities, which help develop and debug your SQL database project.

The SQL Debugger feature of SQL Complete allows you to check the execution of your scripts, procedures, functions, and triggers step by step by adding breakpoints to the lines where you plan to start, suspend, evaluate, step through, and then to continue the execution of your script.

You can download SQL Complete from the dbForge Download page and install it on your machine using a straight-forward installation wizard. The wizard will ask you to specify the installation path for the SQL Complete tool and the versions of SSMS and Visual Studio that you plan to install the SQL Complete on, as an add-in, from the versions that are installed on your machine, as shown below:

Once SQL Complete is fully installed on your machine, the dbForge SQL Complete installation wizard will notify you of whether the installation was completed successfully or the wizard faced any specific issue that you can troubleshoot and fix easily. If there are no issues, the wizard will provide you with an option to open the SSMS tool and start using the SQL Complete tool, as displayed below:

When you open SSMS, you will see a new “Debug” tools menu, under which you can navigate the SQL Debugger feature options. Besides, you will see a list of icons that will be used to control the debug mode of the T-SQL query at the leftmost side of the SSMS tool. If you cannot see the list, you can go to View -> Toolbars -> Debugger to make these icons visible.

During the debugging session, the SQL Debugger icons will be as follows:

The functionality of these icons within the SQL Debugger can be summarized as:

  • Adding Breakpoints to control the execution pause of the T-SQL script at a specific statement allows you to check the debugging information of the T-SQL statements such as the values for the parameters and the variables.
  • Step Into is “navigate” through the script statements one by one, allowing you to check how each statement behaves.
  • Step Over is “execute” a specific stored procedure if you are sure that it contains no error.
  • Step Out is “return” from the stored procedure, function, or trigger to the main debugging window.
  • Continue executing the script until reaching the next breakpoint.
  • Stop Debugging is “terminate” the debugging session.
  • Restart “stop and start” the current debugging session.

#sql server #sql #sql debugger #sql server #sql server stored procedure #ssms #t-sql queries

Jerod  Mante

Jerod Mante

1602023820

SQL Insert Multiple Rows | Insert Multiple Rows In SQL

We can insert multiple rows in the SQL database using insert statement, insert into select statement, and Union All statement. Inserting multiple values in the rows is a tedious task when a table comes with a lot of attributes. In Laravel, we can add the whole array as rows and insert them in the database. We have used the DB query builder and  eloquent model.

Previously, we were habituated to add values in row one at a time which is very time-taking and which also results in a lot of error.  If we want to get rid of this, we are going to learn how to insert the multiple rows in a table at a time.

SQL Insert Multiple Rows

There are different methods to insert values in a table:

1. Using  INSERT Statement.

2. Using  INSERT INTO SELECT statement.

3. Using UNION ALL keyword.

#Syntax

INSERT INTO table_name(column1, column2, ……., column n) VALUES (values in
row 1), (values in row 2), ……… (values in row n);

#sql #sql insert multiple rows

Jerod  Mante

Jerod Mante

1602268380

SQL Update Query Example | SQL Update Statement Tutorial

SQL Update Query Example | SQL Update Statement Tutorial is today’s topic. The SQL UPDATE statement is used to modify the existing records in a table. You need to be very careful when updating records in a table.  SQL WHERE clause in the UPDATE statement specifies which record(s) that should be updated. If you omit the WHERE clause completely, then all records in the table will be updated!

SQL Update Query Example

You need to specify which record needs to be updated via WHERE clause, otherwise all the rows would be affected. We can update the single column as well as multiple columns using the UPDATE statement as per our requirement.

#sql #sql update #sql where