database-developer/references/skills.md

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 (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 %