Oracle to SQL Server Migration, postgres sql

@Jennycreation

As a seasoned developer with over 17 years of comprehensive experience, I have successfully managed numerous complex projects that demand meticulous attention to detail, data integrity, and minimal downtime. Notably, I have dealt with sizable database migrations (over 100 GB) in the past, which makes me particularly qualified for this task. My proficiency in utilizing various tools like pg_dump/pg_restore, SSIS, BCP, and Azure Data Factory allows me to mitigate outage time and maintain the highest level of data integrity. In regards to your requirements for the project deliverables, allow me to assure you of the precision and commitment I bring to the table. I will provide you with not just a fully migrated SQL Server database ready for cut-over but also a reusable migration script or pipeline that empowers you to undertake future refreshes easily. Moreover, I strongly believe in transparency and thus my migration report will outline all datatype conversions, performance tweaks, and objects that required special handling. And of course, verification scripts will be in place to prove row counts, checksums, and referential integrity of both systems.

@ubaidalam217

Hi, I have carefully reviewed your database migration requirements. I understand that this is a production environment where **data integrity, minimal downtime, and repeatability** are more important than simply moving the data. I can help plan and execute the migration with a structured approach: * Analyze the existing Oracle/PostgreSQL schema and dependencies * Map tables, datatypes, indexes, views, functions and constraints to SQL Server * Migrate the 100+ GB dataset using an optimized ETL approach * Handle datatype conversions and unsupported database-specific features * Recreate indexes, constraints, views and required database objects * Perform row-count, checksum and referential-integrity validation * Identify and resolve performance issues after migration * Prepare repeatable migration/verification scripts or an appropriate SSIS/ADF pipeline For the 24/7 production environment, I would first perform a controlled assessment and test migration, then use an incremental/synchronization approach where appropriate so the final cut-over window is kept as short as possible. I will prioritize **data accuracy, rollback planning, validation, and minimal service interruption** throughout the migration. I’m available to discuss the current database versions, schema size, hosting environment and preferred SQL Server setup before starting. Best Regards, Ubaid Alam Full Stack Developer | Database & Backend Development

@waqarinfo

Hi, We went through your project description and it seems like our team is a great fit for this job. We are team of experts which have many years of experience on SQL, Oracle, Database Administration, PostgreSQL, Microsoft SQL Server, ETL, Database Design, Performance Tuning We are new to Freelancer profile but we have very extensive professional experience. Lets connect in chat so that We can describe you our expertise and experience further which will definitely help you to build confidence on us. Thank You

@vinod150987

Hi, I have hands-on experience with PL/SQL, MS SQL Server migrations, and SSIS, and can manage your 100+ GB Oracle migration end-to-end. I’ll begin by analyzing the Oracle schema, dependencies, PL/SQL objects, datatypes, constraints, and performance considerations, then map them accurately to SQL Server. Using SSIS, I’ll build a repeatable migration process for data transfer and future refreshes. I’ll validate tables, views, functions, constraints, row counts, checksums, and referential integrity to ensure consistency. I’ll also provide a concise migration report documenting datatype conversions, performance improvements, and special handling. The final deliverable will be cutover-ready with reliable validation scripts.

@vishal1145

Your 24/7 uptime requirement means you cannot afford a naive lift-and-shift that locks the database for hours. Without a replication or CDC strategy, you'll face extended downtime while 100+ GB transfers, and any schema mismatch will surface only after cutover when it's too late to roll back cleanly. Quick questions - are you planning SQL Server or PostgreSQL as the final target (your description mentions both)? And do you have existing replication infrastructure or will we need to implement CDC for near-zero downtime? Here is the architectural approach: - ORACLE TO SQL SERVER/POSTGRESQL: Build a phased migration using AWS DMS or custom CDC to replicate changes in real-time while the initial bulk load runs, keeping downtime under 15 minutes for final cutover. - ETL + SCHEMA MAPPING: Convert Oracle-specific constructs (PL/SQL packages, ROWNUM, CONNECT BY) into T-SQL or PL/pgSQL equivalents, document every datatype transformation, and generate rollback scripts. - PERFORMANCE TUNING + VALIDATION: Create checksum queries comparing row counts and hash totals across both systems, then optimize indexes and execution plans to match or exceed Oracle query performance. I've migrated 3 enterprise databases over 200 GB from Oracle to both SQL Server and PostgreSQL with zero data loss. Let's schedule a 20-minute call to confirm your target platform and finalize the CDC approach before we start the schema conversion.

@ParasTech7

I’m a Principal-level software engineer with 21+ years of experience in database migrations, scalable backend systems, ETL, and production data platforms. I can handle the complete Oracle → SQL Server migration, including schema/object mapping, 100GB+ data transfer, datatype conversion, constraints, views/functions, performance tuning, and validation. For the 24/7 environment, I’d use a staged migration approach: initial bulk load, incremental/CDC synchronization, verification using row counts/checksums and referential-integrity checks, followed by a short final cut-over to minimize downtime. I’ll also provide a repeatable migration pipeline/scripts and a concise migration report documenting conversions, performance changes, and special-case objects. I have strong experience with SQL, Oracle, PostgreSQL, SQL Server, ETL, and cloud data pipelines, and can take ownership from assessment through production cut-over.

@alluankit01

Hi, I can support your Oracle database migration to SQL Server/PostgreSQL with schema mapping, data transfer, object validation, repeatable migration scripts, and integrity checks for a 100GB+ production database. The best solution is to first confirm the final target platform, review Oracle schemas, tables, views, functions, constraints, indexes, data types, database size, downtime window, and application dependencies. Then I’ll prepare the migration plan, convert schema objects, transfer data in controlled batches, tune performance, and validate row counts, checksums, and referential integrity. I’m comfortable with Oracle, SQL Server, PostgreSQL, SSIS, BCP, Azure Data Factory, pg_dump/pg_restore, ETL workflows, datatype conversion, schema migration, index tuning, large database transfer, validation scripts, and low-downtime cutover planning. Deliverables will include: * Source database assessment * Schema and datatype mapping * Tables/views/functions migration * Constraints and indexes migration * Repeatable migration script/pipeline * Data transfer and validation * Row count and checksum checks * Referential integrity verification * Performance tuning notes * Migration report * Cutover support plan I’ll focus on data integrity, minimum downtime, repeatable migration steps, and clear validation so the migrated database is ready for production cutover. Best regards Ankit

@Appsdbatalha

I am Oracle certified DBA and mssql database administrator having 15 years of experience in installing administrating and migrating oracle databases

@Geetam00

As a full-stack developer with extensive experience in PostgreSQL, I hold all the necessary skills to successfully execute your Oracle to SQL Server migration project. From mapping the schema, converting data, setting up data pipelines and validating every object, my expertise in these migration processes have always exceeded client's expectations. Having collaborated with numerous clients on projects involving large-scale (>100GB) database migrations, I completely understand that maintaining uptime for your system is crucial. To achieve this, I'll employ effective strategies such as utilizing tools like pg_dump/pg_restore, SSIS, BCP or Azure Data Factory ensuring minimal downtime and preserving your system's integrity. In addition to facilitating a seamless migration process within specified timelines, I believe in empowering my clients with the ability to independently manage their systems even after the project handover. Hence I will also provide you with any required scripts needed for future refreshes. My ultimate aim is to provide a fully migrated SQL Server database, ready for cut-over - along with a set of verification scripts that guarantee data consistency.

@ravikumarsingh1

I have a production oracle instance that has grown beyond 100 GB and it now needs to live on SQL ,Server postgres sql . The task covers everything from preparing the source, mapping the schema, transferring the data, and validating that every object—tables, views, functions, and constraints—behaves exactly the same once it lands in SQL Server. Here is what I expect to walk away with: • A fully migrated SQL Server database, ready for cut-over • A repeatable migration script or SSIS/ADF/DMS pipeline so I can re-run the process for future refreshes • A concise migration report highlighting any datatype conversions, performance tweaks, and objects that required special handling • Verification scripts or queries that prove row counts, checksums, and referential integrity match between the two systems The current environment runs 24/7, so downtime must be kept to a minimum. If you have handled large-scale (>100 GB) migrations before and are comfortable with tools such as pg_dump/pg_restore, SSIS, BCP, or Azure Data Factory, we should be in good shape. Please outline your plan for reducing outage time and ensuring data integrity when you reply.

@mejyoti4

I have 10 years of experience in ,MVC,SQL,web api ,Java script and jQuery and 2 years of experience in automation and rpa technology.

@vladbols

Hi, I can handle the full migration of your >100 GB production Oracle database to SQL Server/PostgreSQL with minimal downtime and full data integrity. Approach: 1. Assessment & Mapping
Analyze source schema, datatype differences, unsupported objects and performance-critical parts. Prepare detailed mapping. 2. Preparation
Convert schema (tables, views, functions, constraints, indexes) and build migration pipeline (SSIS, BCP or Azure Data Factory). 3. Data Transfer (minimal downtime)
Initial bulk load + incremental sync / CDC so the final cut-over window stays very short. Production keeps running almost until the switch. 4. Validation
Automated checks: row counts, checksums, referential integrity and critical query comparison. Deliverables: • Fully migrated and tested target database • Repeatable migration scripts/pipeline • Concise report (datatype conversions, special handling, performance notes) • Verification scripts I have solid experience with large-scale database migrations and keeping production systems stable. Questions: • Final target is SQL Server, PostgreSQL, or both? • Any preferred tools or environment restrictions? Happy to discuss the detailed plan.

@umarshahid16

Hi, I can handle the Oracle to SQL Server migration with a strong focus on data integrity, minimal downtime, and a repeatable migration process. I’ll first audit the existing Oracle environment, including the schema, tables, views, functions, procedures, constraints, indexes, dependencies, and data types, and identify any compatibility issues before starting the migration. For the 100+ GB dataset, I’ll perform an initial bulk migration using an appropriate ETL approach such as SSIS or Azure Data Factory, followed by thorough validation of row counts, checksums, constraints, indexes, and referential integrity. I’ll also review datatype conversions and optimize the migrated database where necessary to ensure good SQL Server performance. Since the current system runs 24/7, I’ll use a staged migration approach with an initial data load followed by incremental synchronization and a controlled final cutover. This will help keep production downtime as low as possible while ensuring that no data is lost or inconsistent. I’m ready to begin with an assessment of the current Oracle environment and can then provide a clear migration timeline and execution plan. Regards, Umar

@Glexy111

Hello, I have seen your are looking database migration expert working in Oracle, SQL Server and PostgreSQL I am having 7 years of experienced as database migration expert and I will work according to your features list. Please share more details of your project in chat. Looking forward to your response Thanks

@HuzaifaCodes

Hey, I reviewed your job description. I will map the Oracle schema to SQL Server, migrate the 100+ GB data with minimum downtime, validate tables, views, functions, constraints, row counts, checksums and integrity, and provide a repeatable ETL script or pipeline with a clear migration report. I would really appreciate it if you could connect with me in the chat. I will discuss the price and other details with you directly in the chat. Please come, I’ll be waiting for you there. Warm Regards, Huzaifa

@oscargarcia0726

Hi, I can handle the migration of your 100+ GB production Oracle database with a structured approach focused on data integrity, minimal downtime, and a reliable cut-over to SQL Server or PostgreSQL. I’ll first analyze the Oracle schema, dependencies, data types, views, functions, constraints, indexes, and performance characteristics, then create an appropriate mapping and migration strategy. For the data transfer, I can use suitable tools such as SSIS, Azure Data Factory, BCP, or scripted ETL depending on the target architecture and environment. I’ll build repeatable migration scripts/pipelines and verification queries covering row counts, checksums, constraints, relationships, and critical business objects. To minimize downtime, I’ll use a staged migration approach with validation before cut-over and a final incremental synchronization where appropriate. I’ll also document datatype conversions, compatibility changes, performance optimizations, and any objects requiring manual adjustments. I’m ready to review your Oracle and target environments and define the safest migration plan before touching the production system. Best regards, Oscar

@Navneet4987

Having 6+ years of working experience with implementation. Worked on each and every financial module as well. I will help with mapping the system with oracle fusion production instance for a smooth migration.

@p01s0nvw

PostgreSQL + SQL Server daily, Python ETL. First: paid assessment + datatype matrix, then staged migration with delta sync — cut-over in minutes, checksums + row-count verification. But first — which target DB: SQL Server or PostgreSQL?

@rakhshanz3

I couldn't be more excited about your project! With my background in both computer science and AI, I have acquired necessary skills and experience in handling large-scale database migrations like yours. My familiarity with tools such as pg_dump/pg_restore, SSIS, BCP, and Azure Data Factory would come in handy as we navigate through every step of your project. Over the course of my 20-year career, I've developed full-stack SaaS applications with scalable frontend and backend architecture. My expertise with databases extends to the design and management aspect as well. This is particularly important to ensuring data integrity during a migration process of this scale. Each of my previous roles has been an opportunity to further refine the skills required for these delicate tasks, which means that you can trust me to keep your system up and running while minimizing downtime. In terms of deliverables, I assure you of a fully migrated SQL Server database ready for cut-over along with a repeatable migration script or SSIS/ADF/DMS pipeline for easy future refreshes. A key strength of mine is documenting processes well for future use.