T-SQL Developers Hiring Guide

A programming language used specifically for Microsoft SQL Server

Transact-SQL (Transact Structured Query Language) is a programming language for manipulating and modifying relational databases. This language is mainly used for Microsoft SQL Server.

T-SQL is an extension of SQL. You can use T-SQL metadata functions for retrieving database information. They are also helpful in monitoring and tracking databases. They also allow engineers to easily integrate the server with business tools such as PowerBI and Dynamics.

T-SQL improves transaction control and exception handling for production databases. It also has an option for BULK INSERT, i.e., you can import multiple rows of data into the SQL server. This improves performance and allows more data to be processed per batch run.

T-SQL Developers Hiring Guide 1
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    Hiring Guide

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    Interview Questions

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    Job Description

Many back-end applications use T-SQL for fast performance and scalability. In addition to MS SQL server, other Microsoft tools like SQL Server Management Studio (SSMS), Azure Data Studio, and SQL Server Data Tools (SSDT) also use T-SQL for their query processing.  

You can also add exceptions in T-SQL with TRY and CATCH keywords. This allows you to add use cases for code failure. T-SQL also has ISNULL functionality, an option that is missing in traditional SQL. Furthermore, you can use T-SQL’s local variables for loop counters or procedure return values.

T-SQL in today’s market

According to HG Insight, over 381k companies worldwide are using Microsoft SQL Server. Most companies who utilize Microsoft SQL Server also use T-SQL for querying and manipulating data. 

T-SQL protects and secures a company’s information through isolation levels. It also shields business IPs from malicious access by storing the procedures on the database server itself. This eliminates the possibility of IT sabotage and ensures data integrity.

Issues in finding T-SQL engineers.

Even though there are 7 million SQL engineers worldwide, only a fraction of those specializes in T-SQL. There are a few reasons for that. First, this position requires an engineer who can create, design, and write efficient queries. The engineer also needs to optimize queries for batch processing, to ensure system performance and scalability. Doing this is difficult, and many engineers don’t have the necessary experience and knowledge to handle it. 

Along with query handling, the required engineer should also be good at fixing database-related bugs and issues. Even simple issues like memory ballooning can affect performance and crash server sessions if not fixed quickly. The selected engineer should also have experience in data visualization, which is a different skill in itself.

How to choose the best T-SQL engineer.

To ensure that a T-SQL engineer is good, you need to test their knowledge of MS SQL Server and T-SQL concepts. 

They should have hands-on experience with production databases and should be able to maintain data quality and integrity. They should also know how to run effective T-SQL queries and should be able to create batch procedures for running queries, triggers, and views. 

The selected engineer should be able to solve issues related to network security and performance. In addition, they should have experience in data visualization and should be well versed in the ETL process. 

The selected engineer should also know about agile development. Candidates with Azure experience should be preferred.

What is the difference between SQL and T-SQL?

Both SQL and T-SQL are used for querying databases and manipulating data within a database. However, T-SQL is an extension of SQL specifically designed for Microsoft SQL Server software and databases. This means that if you’re running a native Microsoft server session (or any application using a Microsoft server), you should go for T-SQL as it provides more robustness and functionality.  

T-SQL also uses different keywords than SQL, such as TOP and WAITFOR. The DELETE and UPDATE statements in T-SQL don’t require subqueries. Along with this, you can also access features such as batch query processing and exception control in T-SQL.

What metadata functions are used in T-SQL for returning object properties?

The metadata functions used in T-SQL for generating information are:

OBJECTPROPERTY()- Returns object information for the current database. 

DATABASEPROPERTYEX()- Returns information related to the properties of a database. 

COLUMNPROPERTY () - Returns information about particular columns in a database. 

OBJECTDEFINITION() - Returns T-SQL code for a particular object.

What is the T-SQL window function?

The window function allows the user to execute calculations over a row set defined by a window descriptor, returning a single value for every row. Window descriptor outlines the row on which function should be applied. You can use the OVER keyword for specifying a window. 

What is SQL sandbox?

This is a secure place in the SQL server where you can execute test scripts. In a sandbox environment, DB engineers and DB admins can work and run queries without affecting the production environment. There are 3 types of SQL sandbox: external access sandbox, safe access sandbox, and unsafe access sandbox

What is the use of T-SQL SET statements?

The SET statement allows you to change the session parameters for a particular Microsoft SQL server session. This includes options such as date, lock timeout, language, and row count, among others.  

All the set statements are executed at run time. If the SET statement is a part of a trigger, its value gets restored after its run. You can also specify multiple set statements in one session, and these statements can override ALTER commands. SET statements can also be modified via MARS requests and sp_configure options.


T-SQL‘s stored procedures and user-defined functions allow you to run highly optimized queries on the Microsoft SQL Server. Its batch processing feature improves performance, reduces network bandwidth, and decreases costs. If your company uses Microsoft SQL Server, you should definitely look into investing in T-SQL.

We are looking for smart and qualified T-SQL engineers who can design and work on Microsoft SQL Server. They should be passionate team players who specialize in database management, query handling, and maintenance. 

This is an excellent opportunity for result-oriented engineers who want to work on new and exciting technologies. The selected engineer should also have good communication skills and the ability to coordinate with other stakeholders.


  • Write reliable, enterprise-level code modules on Microsoft SQL Server. 
  • Use T-SQL queries to create database schema and objects. 
  • Develop database infrastructure and architecture. 
  • Work on performance tuning, troubleshooting, and package configuration
  • Maintain stored procedures, triggers, and functions. 
  • Work on database objects such as tables and views
  • Coordinate with internal and external teams for data analysis and data migration. 
  • Follow best industry practices and standards
  • {{Add other relevant responsibilities}}

Skills and Qualifications

  • Knowledge of Microsoft SQL Server, SSRS, and SSAS. 
  • Experience in designing high-performance and optimized code modules  
  • Proven experience working with T-SQL queries and procedure implementation
  • Deep understanding of backend development and query optimization. 
  • Experience with ETL. 
  • Experience with code versioning tools (Git). 
  • Hands-on knowledge of database dashboards.
  • Problem-solving skills and team spirit 
  • {{Add other frameworks or libraries related to your development stack}} 
  • {{List education level or certification required}}

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