As a Database Developer, you will need to master following:

• apply information security policies
• balance database resources
• create data models
• data quality assessment
• data storage
• database development tools
• database management systems
• interpret technical texts
• perform backups
• query languages
• resource description framework query language
• test ICT queries
• use an application-specific interface
• write database documentation

More generally, a database developer is also versed in:

• collect customer feedback on applications
• data extraction, transformation and loading tools
• estimate duration of work
• identify customer requirements
• report analysis results
• use databases

It also helps to know the following:

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