Retire Legacy Databases Without Losing a Record

We modernize enterprise databases — migrating from legacy platforms, optimizing performance and redesigning schemas for cloud-native architectures.

PostgreSQLAzure SQLAmazon RDSOracle
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Deka Technology engineers working on database modernization projects
60%
Average licensing cost reduction
3x
Query performance improvement
0
Data loss tolerance
1500+
Stored procedures migrated
THE CHALLENGE

Legacy databases are the hidden bottleneck

You can modernize your application layer, containerize your services and automate your deployments — but if your database is still a 15-year-old SQL Server instance with 2,000 stored procedures, 500 triggers and no documentation, the bottleneck has just moved. Legacy databases accumulate complexity silently: business logic buried in stored procedures, undocumented dependencies between tables, licensing costs that escalate annually and performance that degrades as data volumes grow.

Database modernization is not just a platform migration — it requires understanding every stored procedure, every trigger, every implicit contract between application code and database schema. Done wrong, it breaks everything. Done right, it unlocks performance, reduces costs and makes the rest of your modernization possible.

OUR APPROACH
01

Analyze & Map

We reverse-engineer the existing database — schema, stored procedures, triggers, views, jobs and dependencies. We map every data flow and identify business logic embedded in the database layer.

02

Design & Migrate

We design the target schema, migrate data using CDC or ETL, convert stored procedures and validate referential integrity. Parallel operation ensures no data loss.

03

Optimize & Cutover

Performance tuning, index optimization, query plan analysis and load testing before cutover. Automated validation ensures the new database produces identical results.

CAPABILITIES

What we deliver

Platform Migration

Oracle to PostgreSQL, SQL Server to Azure SQL, on-premise to managed cloud databases. We handle schema conversion, stored procedure translation and data migration with zero data loss.

Schema Redesign

Normalization or denormalization based on access patterns. Restructuring legacy schemas for modern query workloads, partitioning strategies and multi-tenant architectures.

Stored Procedure Extraction

Moving business logic from the database tier to the application tier where it belongs. We refactor stored procedures into service-layer code with proper testing and version control.

Performance Optimization

Query tuning, index optimization, execution plan analysis and caching strategies. We resolve performance issues that have accumulated over years of organic growth.

High Availability Architecture

Always-on availability groups, read replicas, automatic failover and disaster recovery configurations. Database architectures that meet enterprise RPO and RTO requirements.

Stuck on Oracle Forms, MS Access or an aging SQL Server?

Talk to a database engineer who migrates enterprise data with zero loss.

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60%
Average licensing cost reduction
3x
Query performance improvement
0
Data loss tolerance
1500+
Stored procedures migrated
PROJECT SPOTLIGHT
DATABASE MODERNIZATION

AgeSA

CHALLENGE

AgeSA operated critical insurance systems on aging Oracle databases with 1,500+ stored procedures containing core business logic. Licensing costs were escalating and performance was degrading under growing data volumes.

APPROACH

We reverse-engineered every stored procedure, migrated business logic to the application tier, converted the schema to PostgreSQL and executed a zero-downtime cutover using CDC-based synchronization.

RESULT

Annual database licensing costs reduced by 60%. Query performance improved 3x on critical reporting workloads. Business logic is now version-controlled and testable.

60% cost reduction3x query performanceZero data loss
USE CASES

Where we apply it

  • Cut database licensing costs 60% by migrating to PostgreSQL
  • Consolidate databases across merged business units without downtime
  • Move to Azure SQL or Amazon RDS with zero data loss
  • Restore fast query performance on degraded legacy databases
  • Give each microservice its own database without chaos
TECHNOLOGY

Technologies

PostgreSQLAzure SQLAmazon RDSOracleSQL ServerMongoDBRedisDebeziumFlywayLiquibase
TECHNOLOGY PARTNERS
Microsoft Microsoft
AWS AWS
Red Hat Red Hat
FAQ

Common questions about database modernization

Can you migrate from Oracle to PostgreSQL without losing functionality? +

Yes. We have migrated complex Oracle databases with thousands of stored procedures, packages and triggers to PostgreSQL. Some Oracle-specific features require refactoring (e.g., autonomous transactions, Oracle-specific SQL syntax), but we handle the conversion systematically with automated testing for every procedure.

How do you ensure zero data loss during migration? +

We use change data capture (CDC) to continuously replicate changes from the source database to the target during migration. Automated row-count and checksum validation runs continuously. Cutover happens only when both databases are fully synchronized and validated.

What about stored procedures with embedded business logic? +

We recommend extracting business logic from the database tier to the application tier during modernization. This makes the logic testable, version-controlled and independent of the database platform. We refactor each procedure into service-layer code with comprehensive test coverage.

How long does a typical database migration take? +

A focused migration of a single database with moderate complexity takes 8-12 weeks. Large estates with multiple databases and extensive stored procedure logic run 4-6 months. We deliver incrementally — migrating read workloads first, then write workloads.

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Related case studies

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DATABASE MODERNIZATION
Oracle to PostgreSQL migration for insurance platforms
AgeSA
INFRASTRUCTURE
Database consolidation across subsidiaries
Anadolu Group

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