- ▸ Instance dependencies were missed - CLR, Agent jobs, linked servers, cross-database behavior, SSIS, identity, networking, and external integrations have not been evaluated against the exact Azure SQL target.
- ▸ Write ownership is ambiguous at cutover - The runbook does not define application stop, final synchronization, authoritative writer, validation, or rollback boundaries.
- ▸ Edition changes are mixed into migration risk - Technical feature eligibility and commercial entitlement have not been reviewed separately before the target is approved.
JusDB migration consultants own the cutover playbook + rollback plan, end-to-end. Book a migration scoping call →
SQL Server Migration Services
In short: SQL Server migration is a DBRE-controlled move between versions, infrastructure, Azure SQL targets, or database engines. It inventories dependencies, assesses compatibility, selects and rehearses data movement, validates data and application behavior, defines write ownership, and executes cutover with explicit stop, rollback, recovery, monitoring, and handoff criteria.
Whether the target is a supported SQL Server release, Azure SQL, or a different engine, the viable path depends on the exact versions, features, workload, recovery objectives, and application dependencies. Downtime and data-loss risk are measured during rehearsal rather than promised generically.
SQL Server Migration Paths We Support
Each path has different compatibility, tooling, interruption, validation, and operating-model constraints.
Supported in-place or side-by-side upgrades selected from Microsoft upgrade paths, lifecycle state, application compatibility, recovery requirements, and measured cutover constraints.
- Supported version upgrade
- Side-by-side migration
- Compatibility-level validation
- Eligible AG upgrade path
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
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
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
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 Movement
Run the selected full-load and incremental synchronization method, with lag, errors, source impact, and restart behavior monitored.
Testing & Validation
Validate objects, data, application behavior, performance, security, operations, backup and recovery, and reconciliation exceptions.
Cutover & Handoff
Execute the approved stop, final sync, connection switch, validation, rollback decision, monitoring, and ownership handoff sequence.
Migration Tools & Technologies
SQL Server migration and upgrade sources
Review scope: Source and target inventory, compatibility, feature dependencies, data-movement choices, rehearsal, validation, cutover, rollback, and achievable interruption for the selected path. Guidance is checked against primary Microsoft documentation; recommendations, schedules, response targets, and outcomes remain workload-, version-, topology-, access-, and contract-specific.
Technically reviewed by the JusDB Database Reliability Engineering team. Last reviewed: . See the team and roles.
- SQL Server migration documentation
Microsoft's migration hub for version upgrades, Azure SQL targets, Azure VMs, and non-SQL sources.
- Migrate SQL Server to Azure SQL in SSMS
Current readiness-assessment, target-recommendation, and supported data-movement workflow in SSMS.
- Azure SQL migration assessment rules
Documented blockers and warnings for Azure SQL Database targets.
Migration FAQs
What determines SQL Server migration downtime?
The achievable interruption depends on the source and target, supported upgrade path, database size and change rate, application behavior, feature dependencies, network, and data-movement method. Log shipping, availability-group paths, managed-service link features, replication, or backup and restore may reduce interruption in eligible cases. Rehearsals measure the actual window; zero downtime is not assumed.
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?
Duration is estimated after inventory and rehearsal. Version path, estate size, data volume, change rate, schema and code conversion, integrations, test coverage, security review, access windows, and stakeholder approvals all affect the schedule. The project plan separates preparation time from the final application cutover window.
Do you support migrating to Azure SQL Database or Azure SQL MI?
Yes. Target selection starts with current Microsoft migration-readiness assessment and documented target differences. Azure SQL Database, Azure SQL Managed Instance, and SQL Server on Azure VMs have different feature, networking, identity, operations, and migration paths. Tool and online-migration eligibility are confirmed for the exact source and target.
What happens if something goes wrong during migration?
The runbook defines stop conditions, rollback or forward-recovery choices, data-divergence handling, validation owners, and the point after which rollback is no longer safe. Whether the source can remain a usable fallback depends on write direction, version path, data synchronization, and application behavior, so it must be rehearsed rather than presumed.
Do you migrate SQL Server Agent jobs, linked servers, and logins?
Instance-level objects and dependencies are inventoried explicitly: logins and SIDs, roles, credentials, Agent jobs, linked servers, Database Mail, SSIS or SSRS assets, certificates, keys, maintenance, and external integrations. Each object is migrated, redesigned, replaced, or excluded according to target support and the approved scope; not every SQL Server feature has a direct managed-service equivalent.
Related SQL Server Services
Choose the SQL Server service that matches the decision, incident, project, or recurring ownership need
SQL Server Consulting
Evidence-backed SQL Server architecture, Always On design, performance diagnosis, and migration decisions
SQL Server Performance Tuning
Query Store analysis, missing-index recommendations, execution-plan optimization, and statistics tuning
SQL Server High Availability
Always On Availability Groups, FCI, log shipping, replication, and multi-region DR architectures
Need a different SQL Server service? Browse our complete offerings.