# Competences — database developer

Source: ESCO v1.2.1 occupation-skill relations (http://data.europa.eu/esco/occupation/b11e1742-5e28-4270-b081-b0193d85ee7d).

## Essential

- **apply information security policies** (skill/competence)
- **balance database resources** (skill/competence)
- **collect customer feedback on applications** (skill/competence)
- **create data models** (skill/competence)
- **data extraction, transformation and loading tools** (knowledge)
- **data quality assessment** (knowledge)
- **data storage** (knowledge)
- **database development tools** (knowledge)
- **database management systems** (knowledge)
- **estimate duration of work** (skill/competence)
- **identify customer requirements** (skill/competence)
- **interpret technical texts** (skill/competence)
- **perform backups** (skill/competence)
- **query languages** (knowledge)
- **report analysis results** (skill/competence)
- **resource description framework query language** (knowledge)
- **test ICT queries** (skill/competence)
- **use an application-specific interface** (skill/competence)
- **use databases** (skill/competence)
- **write database documentation** (skill/competence)

## Optional

- ABAP (knowledge)
- address problems critically (skill/competence)
- AJAX (knowledge)
- Ajax Framework (knowledge)
- APL (knowledge)
- ASP.NET (knowledge)
- Assembly (computer programming) (knowledge)
- C# (knowledge)
- C++ (knowledge)
- CA Datacom/DB (knowledge)
- COBOL (knowledge)
- CoffeeScript (knowledge)
- Common Lisp (knowledge)
- computer programming (knowledge)
- create solutions to problems (skill/competence)
- data engineering (knowledge)
- DB2 (knowledge)
- Erlang (knowledge)
- execute analytical mathematical calculations (skill/competence)
- execute ICT audits (skill/competence)
- execute integration testing (skill/competence)
- execute software tests (skill/competence)
- Filemaker (database management systems) (knowledge)
- Groovy (knowledge)
- hardware architectures (knowledge)
- Haskell (knowledge)
- IBM Informix (knowledge)
- IBM InfoSphere DataStage (knowledge)
- IBM InfoSphere Information Server (knowledge)
- ICT infrastructure (knowledge)
- ICT power consumption (knowledge)
- identify ICT security risks (skill/competence)
- Informatica PowerCenter (knowledge)
- integrate system components (skill/competence)
- Java (computer programming) (knowledge)
- JavaScript (knowledge)
- JavaScript Framework (knowledge)
- LDAP (knowledge)
- LINQ (knowledge)
- Lisp (knowledge)
- manage business knowledge (skill/competence)
- manage cloud data and storage (skill/competence)
- manage digital documents (skill/competence)
- MarkLogic (knowledge)
- MATLAB (knowledge)
- MDX (knowledge)
- Microsoft Access (knowledge)
- Microsoft Visual C++ (knowledge)
- ML (computer programming) (knowledge)
- MySQL (knowledge)
- N1QL (knowledge)
- Objective-C (knowledge)
- ObjectStore (knowledge)
- OpenEdge Advanced Business Language (knowledge)
- OpenEdge Database (knowledge)
- Oracle Application Development Framework (knowledge)
- Oracle Data Integrator (knowledge)
- Oracle Relational Database (knowledge)
- Oracle Warehouse Builder (knowledge)
- Pascal (computer programming) (knowledge)
- Pentaho Data Integration (knowledge)
- perform data mining (skill/competence)
- Perl (knowledge)
- PHP (knowledge)
- PostgreSQL (knowledge)
- Prolog (computer programming) (knowledge)
- Python (computer programming) (knowledge)
- QlikView Expressor (knowledge)
- R (knowledge)
- Ruby (computer programming) (knowledge)
- SAP Data Services (knowledge)
- SAP R3 (knowledge)
- SAS Data Management (knowledge)
- SAS language (knowledge)
- Scala (knowledge)
- Scratch (computer programming) (knowledge)
- Smalltalk (computer programming) (knowledge)
- SPARQL (knowledge)
- SQL (knowledge)
- SQL Server (knowledge)
- SQL Server Integration Services (knowledge)
- store digital data and systems (skill/competence)
- Swift (computer programming) (knowledge)
- Teradata Database (knowledge)
- TripleStore (knowledge)
- TypeScript (knowledge)
- use back-up and recovery tools (skill/competence)
- use personal organization software (skill/competence)
- use query languages (skill/competence)
- use software design patterns (skill/competence)
- use spreadsheets software (skill/competence)
- VBScript (knowledge)
- verify formal ICT specifications (skill/competence)
- Visual Basic (knowledge)
- WordPress (knowledge)
- XQuery (knowledge)

<!-- market-evidence -->

## Market evidence (job-ad analysis, 56 ads, as of 2026-07-11)

Share of analyzed job ads mentioning the item (threshold ≥ 20 %). Source: JSearch/Adzuna APIs.

### Hard skills

- data modeling — **54 %**
- database design — **46 %**
- performance tuning — **29 %**
- database administration — **23 %**
- data migration — **20 %**

<!-- market-evidence -->