T-SQL Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used T-SQL
Markus B.
Last position:
Consultant, Technical Project Manager at Lanxess
- Project: ESU Windows and SQL Server Consolidation / Configuration Management in ServiceNow
- Prepared an as-is analysis of all servers worldwide
- Prepared an as-is analysis of all SQL servers worldwide
- Conducted requirements analyses for SQL and server migrations
- Coordinated requirements with partners for migrations to Hyper-V (on-premises) or Azure Cloud
- Facilitated regular status meetings (Jour Fixe)
- Developed roadmaps and solution models for server migrations
- Set up test scenarios
- Facilitated workshops for the rollout of a global admin team
- Designed data models (CMDB) in ServiceNow
- Led workshops for the CMDB data model
- Developed solution models for the CMDB
- Created end-to-end configuration documentation and work instructions for the CMDB
- Prepared reports for license management
- Defined KPIs for data quality in ServiceNow
- Created a service catalog
- Facilitated workshops to define service requests
- Acted as interface between requirements analysis and the ServiceNow development team
- Systems used: Windows 7, Windows 10, Microsoft Office 365/2010, Windows Server 20xx, SQL Server 20xx, SharePoint, Azure Cloud, Hyper-V, ServiceNow, various tools
Henning U.
Last position:
Senior Expert Data Governance, Master Data Quality and Data Migration at E.ON
- Planning and implementation of a migration strategy for master and transaction data for the continuous loading of a cloud-independent database
- Creation and pilot implementation of a company-wide Business Data Model for customers, suppliers, contracts, products, prices, consumption, invoices, and dunning
- Concept and consulting for a Data Governance Framework incl. definition of committees, roles, processes, and metadata model
- Operationalization of the Data Governance Framework with definition of data standards
- Sub-project management in two pilot projects (PoCs) for Data Governance systems (ErwinDIS and Atlan)
- Training and coaching the data team in migration, data quality, and data modeling
Yaroslav S.
Last position:
Senior Low-Code Consultant at Freelancer
Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix
Thomas R.
Last position:
Power BI Consultant
Focus:
Consulting in reporting and project management for Power BI
Goal:
Creation of IT application dashboards for business areas
Activities:
- Technical consulting and support in managing and coordinating an existing reporting setup
- Structured collection, analysis, and preparation of business reporting requirements
- Technical coordination with defined internal contacts
- Design and optimization of Power BI reports to improve data analysis
- Development of concepts and recommendations for the further development of an efficient and transparent reporting system
- Support in the user-friendly visualization of relevant company KPIs as a basis for decision-making
Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery M, BCS
Vladimir M.
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Peter B.
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Robert M.
Last position:
Air traffic tax German Customs Administration SOAP Webservices Client Requests at Team GmbH
In the citizens' and business customer portal of the Customs Administration, airlines submit applications for departures and landings every month
These applications are forwarded to the caseworkers via SOAP web service and, after review and processing, any queries or notifications are returned via SOAP web service
PL/SQL programming of SOAP webservices client requests for HTTP/XML message exchange between the BuG portal and the caseworkers
New creation and change requests for Forms and Reports 12 modules
Forms applications start and read SOAP webservice requests via PL/SQL packages, process them and send Reports 12 documents to the airlines
Ronny H.
Last position:
Förderbank Deutschland
- Extraction and transformation of relevant data from the SAP system developed for the bank and consolidation into the existing reporting environment
- Integration of the data into the existing BI model (extending the star schema to a galaxy schema) for generating the funding committee report and the business development report
- Ensuring data quality
- Knowledge transfer to department staff (SAP, SQL database, Power Pivot, DAX)
René P.
Last position:
CIO at clics GmbH
- Software development
- Team management
- Project management
Discover over 15,000 top freelancers
Statistics of experts using T-SQL
Aggregated from the professional profiles of matched freelancers.
Experience
27 years (Germany: 23 years)
Position duration
3.6 years (Germany: 3 years)
Positions per freelancer
18 (Germany: 17)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Transportation
Certification focus areas
Project Management, Information Technology, Product Development
Bachelor's degree or higher
67% (Germany: 84%)
Master's degree or higher
17% (Germany: 56%)
Doctorate
17% (Germany: 9%)
Certifications per freelancer
6 (Germany: 3)
Most common languages
German, English, Russian
Speak two or more languages
89% (Germany: 95%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Cologne using T-SQL
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
T-SQL experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (89%)
- Banking and Finance (67%)
- Transportation (56%)
- Professional Services (56%)
- Telecommunication (56%)
- Chemical (44%)
- Insurance (44%)
- Manufacturing (44%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
T-SQL foundations
T-SQL, also called Transact-SQL, is Microsoft SQL Server’s programming language for working with relational data. It extends standard SQL with variables, control flow, stored procedures, error handling and transaction control. Companies use it to turn business rules into dependable database operations.
What it builds
T-SQL sits behind transactional systems, reporting databases and data integration workflows. It supports customer records, finance processes, inventory systems and operational analytics where consistent data matters.
- Stored procedures and database functions
- Views, triggers and controlled data changes
- Reporting queries and data preparation
- Batch processing and integration routines
Ecosystem and tooling
Strong T-SQL work usually involves SQL Server, Azure SQL Database or SQL Server Management Studio. Professionals may also use Azure Data Factory, SQL Server Integration Services, SQL Server Reporting Services, Power BI and source control. Familiarity with execution plans, indexing, security and backup strategies is equally important.
When to bring in expertise
Companies often seek freelance specialists when a database has become slow, difficult to maintain or central to a migration. They can review query plans, restructure procedures, improve data models and document database logic without disrupting daily operations. In Cologne, remote collaboration is common, while workshops with local teams can support complex process discovery.
- Investigate blocking, deadlocks and slow queries
- Modernize legacy stored procedures
- Prepare SQL Server or Azure SQL migrations
- Connect operational data to reporting tools
What strong specialists deliver
The best professionals understand both database behavior and the business process behind each query. They write readable, testable T-SQL, use transactions carefully and measure changes with execution plans rather than guesswork. They also explain trade-offs clearly to application, analytics and operations teams.
Choosing the right professional
Look for practical evidence with the SQL Server features your system depends on, not just familiarity with basic SQL syntax. Ask how the specialist approaches indexing, data integrity, deployment and rollback. For Cologne-based projects, clarify expectations for German-language workshops, on-site sessions and secure remote access before work begins.
Frequently asked questions
What clients ask us most about T-SQL — answered in short.
T-SQL is used to query and update SQL Server data, define stored procedures, enforce business rules and manage transactions. It also supports reporting, data preparation, error handling and administrative routines within the Microsoft data platform.
Transact-SQL includes the core SQL language but adds Microsoft-specific features such as procedural logic, variables, temporary objects, error handling and stored procedures. It is designed for SQL Server and Azure SQL, so portability may be lower than with database-agnostic SQL.
A strong T-SQL specialist often brings SQL Server performance tuning, relational data modeling and database security skills. Experience with Azure SQL, Power BI, SSIS, SSRS, application integration or migration planning can be valuable depending on the project.
The right T-SQL experience depends on the risk and scope of the work. A reporting query may need focused query expertise, while a production migration or redesign calls for proven work with transactions, deployment, recovery and performance under real workloads.
T-SQL work is often well suited to remote collaboration through controlled database access, documentation and screen-sharing sessions. Cologne companies should still agree on access security, meeting language and whether occasional on-site workshops are needed.
Ask a T-SQL specialist to explain an execution plan, indexing decision or transaction strategy from a relevant project. Review whether their code is readable, testable and safe under failure conditions, and request clear evidence of monitoring and rollback practices.
T-SQL is a practical choice when a company already relies on SQL Server, Azure SQL and Microsoft reporting or integration tools. Another database language may be preferable when portability, a different database engine or a specialized workload is the primary concern.
Before starting Transact-SQL work, clarify the SQL Server environment, data sensitivity, deployment process and access boundaries. Freelancers should also understand whether the assignment covers query tuning, stored procedures, migration, reporting or broader database ownership.
The average hourly rate of freelancers in Cologne, Germany who have used T-SQL in their recent projects is 102 €, which corresponds to a daily rate of about 819 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used T-SQL in their recent projects, 67% hold at least a Bachelor's degree, 17% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Cologne, Germany who have used T-SQL in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 3.6 years.
The most common languages among freelancers in Cologne, Germany who have used T-SQL in their recent projects are German (100%), English (89%), and Russian (22%).
The most common industries among freelancers in Cologne, Germany who have used T-SQL in their recent projects are Information Technology (89%), Banking and Finance (67%), and Transportation (56%).
The most common business areas among freelancers in Cologne, Germany who have used T-SQL in their recent projects are Information Technology (100%), Product Development (89%), and Quality Assurance (78%).
Main locations of FRATCH Experts, who have recently used T-SQL
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich 
Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg 
Berlin 
Munich 
Frankfurt 
Dusseldorf Countries:
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