How do you achieve zero downtime for SQL Server version upgrades?

We use Always On AG-based rolling upgrades: add a secondary replica running the target version, synchronize data, then failover. The primary cutover window is typically under 30 seconds with automatic failover. For non-AG environments we use log shipping with a planned cutover window.

What is involved in migrating from Oracle to SQL Server?

Oracle-to-MSSQL migrations involve schema conversion (using SSMA — SQL Server Migration Assistant), stored procedure and function rewriting (PL/SQL to T-SQL), data type mapping, sequence-to-identity conversion, and application connection string updates. We handle assessment, conversion, testing, and cutover.

How long does a SQL Server version upgrade take?

A straightforward SQL Server 2016→2022 upgrade with AG-based failover typically takes 2–4 hours of planned maintenance. Cross-platform migrations (Oracle to SQL Server) are larger projects ranging from weeks to months depending on schema complexity.

Do you support migrating to Azure SQL Database or Azure SQL MI?

Yes. We assess compatibility using Database Experimentation Assistant (DEA) and Azure Migrate, handle feature gap remediation, use Azure Database Migration Service (DMS) for near-zero-downtime migration, and configure Azure-specific features like elastic pools and serverless tiers.

What happens if something goes wrong during migration?

Every migration we perform includes a documented rollback plan with tested revert steps. We maintain the source environment intact until production validation is complete. For version upgrades, the original instance remains available as a fallback.

Do you migrate SQL Server Agent jobs, linked servers, and logins?

Yes. We script and transfer all SQL Server Agent jobs, linked servers, logins (with SID preservation), roles, permissions, SSIS packages, SSRS reports, database mail profiles, and maintenance plans to the target server.

Migration in flight — sound familiar?

▸ CLR assemblies + SSIS that Azure SQL MI won't take as-is — consolidating onto SQL Server 2022 or Azure SQL Managed Instance surfaces unsupported CLR assemblies, cross-database queries, and SSIS packages that need re-hosting (SSIS in Azure Data Factory). The migration plan didn't budget for this.
▸ Always-On AG split-brain at cutover — The secondary that should have promoted didn't — both sides accepted writes for 4 minutes during the failover window, and you have inconsistent state.
▸ License audit mid-cutover — You switched Edition during the migration (Enterprise → Standard, or Web → Standard) and the auditor now wants per-core licensing back-dated to the cutover.

JusDB migration consultants own the cutover playbook + rollback plan, end-to-end. Book a migration scoping call →

100% Migration Success Rate

SQL Server Migration Services

In short: A SQL Server migration covers version upgrades to 2022, on-prem to Azure SQL, and Oracle/MySQL/PostgreSQL cross-platform moves, run through a six-step process — assessment, planning, schema and object migration, data migration with CDC, testing, and cutover. Always On AG rolling upgrades deliver sub-30-second cutover windows with full data-integrity validation.

Whether you're upgrading to SQL Server 2022, moving to Azure SQL, or migrating from Oracle — our certified DBAs deliver zero-downtime migrations with full data integrity validation.

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100%

Data Integrity

< 30s

AG Cutover Window

Failed Migrations

80+

Migrations Delivered

Migration Paths

SQL Server Migration Paths We Support

From version upgrades to cross-platform migrations — we've done them all.

SQL Server Version Upgrade

In-place or side-by-side upgrades from SQL Server 2012/2014/2016/2017/2019 to SQL Server 2022, with Always On AG-based zero-downtime cutover.

2012/2014 → 2022
2016/2017 → 2022
2019 → 2022
AG rolling upgrade

On-Premises to Azure SQL

Lift-and-shift and modernization migrations from on-prem SQL Server to Azure SQL Database, Azure SQL Managed Instance, or SQL Server on Azure VMs.

Azure SQL Database
Azure SQL Managed Instance
SQL Server on Azure VM
Azure Database Migration Service

Oracle to SQL Server

Full schema conversion, PL/SQL to T-SQL rewriting, data migration, and application validation using SQL Server Migration Assistant (SSMA).

Schema conversion via SSMA
PL/SQL → T-SQL rewrite
Sequence → Identity migration
Synonym and trigger conversion

MySQL / PostgreSQL to SQL Server

Cross-database migrations from MySQL or PostgreSQL to SQL Server with schema mapping, data type conversion, and stored procedure adaptation.

SSMA for MySQL
Schema & data migration
Stored procedure conversion
Application cutover support

Process

Our Migration Process

A structured, risk-managed process with rollback plans at every stage.

Assessment & Discovery

Inventory databases, assess compatibility, identify blockers, and size target infrastructure.

Migration Planning

Define cutover strategy, rollback plan, testing milestones, and stakeholder communication plan.

Schema & Object Migration

Convert schema, stored procedures, functions, and views. Script logins, jobs, and linked servers.

Data Migration

Full initial load with ongoing CDC (change data capture) to keep source and target in sync during testing.

Testing & Validation

Functional testing, performance benchmarking, and row count / checksum validation of migrated data.

Cutover & Go-Live

Final sync, application connection switch, DNS/listener update, and post-cutover monitoring.

Tooling

Migration Tools & Technologies

SQL Server Migration Assistant (SSMA)

Azure Database Migration Service

Database Experimentation Assistant (DEA)

bcp / BULK INSERT

SQL Server Integration Services (SSIS)

Attunity Replicate / Qlik Replicate

Redgate SQL Compare

ApexSQL Diff

dbatools PowerShell module

Azure Migrate Assessment

FAQ

Migration FAQs

Plan Your SQL Server Migration Today

Get a free migration assessment — we'll review your source environment, identify risks, and produce a detailed migration plan with timelines and effort estimates.

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