Languages and coding

Prashanth Jayaram
Create Azure SQL Database using Azure portal to restore the geo backup

Quick start guide to Geo-restore in Azure SQL Database

November 24, 2020 by

Azure SQL Database—a cloud-based service model provides a platform to back up the data and ensure to keep the business up-and-running even after the disaster. The data is vital and backup of the data revolves around the process of backup, restoration, recovery, Business-Continuity-Plans (BCP), and disaster recovery (DR). In this article, we will learn:

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Emil Drkusic
the data model

Learn SQL: SQL Injection

November 2, 2020 by

SQL Injection is a well-known technique used to attack SQL-based applications. In this article, we’ll focus on examples showing how you could exploit database vulnerabilities using this technique, while in the next article we’ll talk about ways how you can protect your application from such attacks.

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Nisarg Upadhyay
Job schedule

T-SQL scripts to generate database health reports

October 21, 2020 by

In this article, I am going to show how we can automate a database daily health report using T-SQL scripts. For a senior database administrator, it is always important to review the health of the database server. When a DBA manages many database servers, it becomes difficult to visit every server and review the status of databases, SQL jobs, and backups. To ease the monitoring, I have developed a T-SQL script that populates the following information:

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Emil Drkusic
joining two tables using > operator

Learn SQL: Non-Equi Joins in SQL Server

September 29, 2020 by

Non-Equi join in SQL Server sounds like something abstract (and fancy), but it’s not so abstract (and fancy) at all. The same stands for equi joins. After reading this article, I hope you’ll agree on that with me. Today’ I’ll try to explain what they are and when you should use them. So, let’s start.

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Nisarg Upadhyay
New Job Schedule that executes a SP to populate the unused tables of SQL Database

Identify unused tables of SQL databases

September 24, 2020 by

In this article, I am going to demonstrate how we can identify the unused tables of a given SQL Database. As a database administrator, we must maintain the tables and objects of the SQL Database. In my organization, when we add a new column or change the data type of a column, we export the data of the existing table in the backup table. Often, we forgot to review and maintain those backup tables. So as a solution, we decided to create a SQL Job that populates the list of unused tables and email the list to the DBA Team for review.

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Esat Erkec
How to read a file of JSON in SQL Server with OPENJSON function

How to parse JSON in SQL Server

September 15, 2020 by

In this article, we will learn how to parse and query JSON in SQL Server with the help of the OPENJSON function. Firstly, we will briefly look at the data structure of the JSON and then we will learn details of the parsing and querying JSON data using the OPENJSON function.

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Emil Drkusic
SQL-related jobs - the data model

Learn SQL: SQL-Related Jobs

September 1, 2020 by

In today’s article, we’ll take a look at 4 common SQL-related jobs and roles and explain what kind of tasks you could expect at each of these roles and what types of queries you’ll possibly use to solve these tasks. If you’re already in any of these roles, you’re probably familiar with this, but if you’re new to the world of SQL, you could find this very useful to decide in which way you want your career to develop.

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Rajendra Gupta
Copy file using the xp_cmdhell

T-SQL scripts to copy or remove files from a directory in SQL Server 2019

August 21, 2020 by

Sometimes database professionals need to perform specific tasks at the operating system level. These tasks can be like copying, moving, deleting files and folders. A use case of these tasks might be removing the old backup files or copying backup files to a specific directory after a particular time. In SQL Server, we can use xp_cmdshell extended stored procedure to execute commands directly in the Windows command prompt(CMD). You need a sysadmin role or proxy account configured to use this extended procedure. We can also use the SSIS package for the file transfer, but it also requires you to build a package with the relevant tasks.

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Aveek Das
Selecting data from table

Introduction to SQLAlchemy in Pandas Dataframe

August 20, 2020 by

In this article, I am going to demonstrate how to connect to databases using a pandas dataframe object. Pandas in Python uses a module known as SQLAlchemy to connect to various databases and perform database operations. In the previous article in this series “Learn Pandas in Python”, I have explained how to get up and running with the dataframe object in pandas. Using the dataframe object, you can easily start working with your structured datasets in a similar way that of relational tables. I would suggest you have a look at that article in case you are new to pandas and want to learn more about the dataframe object.

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Aveek Das
Virtual Environment created

Working with Pandas Dataframes in Python

August 19, 2020 by

In this article, I am going to explain in detail the Pandas Dataframe objects in python. In the previous article in this series Learn Pandas in Python, I have explained what pandas are and how can we install the same in our development machines. I have also explained the use of pandas along with other important libraries for the purpose of analyzing data with more ease. Pandas provides a dataframe object which makes it relatively easier to consider working with the data as it provides a tabular interface for the data in it. People who are already familiar in working with relational databases, they can really find similarities between a table in the database and the dataframe object in pandas.

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Nisarg Upadhyay
create and drop temp table: create a new temp table using select query.

Learn MySQL: Create and drop temp tables

August 18, 2020 by

In this article, we are going to learn how to create a temp table and further drop these tables. The temporary tables are session-specific tables that are created within the session. When the session closes, the table is dropped by itself. A temporary table exists within a session only; therefore, a table created by one session is not visible to another session. For example, Session ID 501 has created a temporary table then session ID 502 cannot access it or manipulate it. Two different sessions can have a temporary table with the same name.

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