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PowerBuilder Azure DevOps SQL query

Research legacy PowerBuilder source code to document the steps the application uses with data.
Resource must have a high level of SQL query writing skills to write complex queries to pull data from a Sybase and MS SQL Server database.
Must have experience developing processes to extract and manipulate data to support data migration and data cleansing of application data.
Must have experience in performing data profiling, data mapping, data manipulation, validation, and analysis.
Must have experience working with source control technologies such as TFS/Azure DevOps, or GIT.
Must have experience documenting and performing unit testing to support program changes.
Must have experience creating, updating, and maintaining documentation for programs, system specs, and flow diagrams.
Must be able to work with the client and/or Business Analyst to support test scenarios.
Analyze and document identified problems to determine root cause and provide root cause analysis.
Follow change management procedures and provide input to execute changes.