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DTM Schema Comparer
What DTM Schema Comparer is
DTM Schema Comparer is a Windows application for comparing and synchronizing database schemas across database engines. It covers tables, columns, views, indexes, triggers, keys, comments, and stored procedures. Schemas appear as trees with synchronous navigation; red, green, and yellow markers identify different, orphaned, and equal objects. The tool can compare or synchronize a whole schema or a selected part, and it can produce a .SQL synchronization script without applying changes. GUI and command-line modes support batch files and schedulers, including Windows Task Scheduler. Connectivity options include ODBC, IDAPI, OLE DB, and native Oracle Call Interface support. It can compare MySQL schemas with Microsoft SQL Server or Sybase, and DB2 schemas with Microsoft SQL Server or MySQL. Other features include object text comparison, optional external text comparison, MySQL filters, and HTML reports with three levels of detail. Standard costs $179, paid once, and Professional costs $249, paid once; each license permits one installation on one computer, with a second copy allowed on the primary user's portable computer. There is no free plan, but a free trial is listed.
Who it suits
DTM Schema Comparer suits database professionals who need to compare or synchronize schemas across supported engines. Its command-line and scheduler support may also fit recurring comparison tasks.
What it does well
- Compares and synchronizes whole schemas or selected parts.
- Can generate a .SQL script without applying synchronization.
- Supports ODBC, IDAPI, OLE DB, and Oracle Call Interface.
- Includes HTML reports with three information levels.
What to know first
- No free plan.
- Windows platform only.
- A single license covers one computer installation.
- Standard costs $179, paid once.
Limits
There is no free plan. A single license allows one installation on one computer, with a second copy for the primary user's portable computer; Standard and Professional are one-time purchases.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Standard | 1 license · build 1.12 | $179, paid once |
| Professional | 1 license · build 1.12 | $249, paid once |
As sqledit.com lists them, read 30 Sept 2026. The maker's own page has the final word.
Getting started
- Open the DTM Schema Comparer website
- Download the Win32 Unicode or x64 Unicode build
- Install it on a Windows computer
- Choose Standard or Professional licensing
- Connect databases through a supported interface
- Run a comparison or generate a synchronization script
Verdict
DTM Schema Comparer combines cross-engine schema comparison with synchronization, scripting, automation, and reporting. Its Windows focus and per-license installation terms are worth noting.
Questions
How much does DTM Schema Comparer cost?
Standard costs $179, paid once and Professional costs $249, paid once.
Is there a free trial?
Yes. A free trial is available, but there is no free plan.
Which operating systems are supported?
The listed platform is Windows, with desktop editions from Windows XP through Windows 10 and Windows Server versions in the system requirements.
Can it compare different database engines?
Yes. Listed combinations include MySQL with Microsoft SQL Server or Sybase, and DB2 with Microsoft SQL Server or MySQL.
Can it create migration scripts?
Yes. It can create a .SQL synchronization script without performing synchronization.
What does one license allow?
One license permits one installation on one computer, with a second copy allowed for the primary user's portable computer.
Facts from DTM Schema Comparer's own pages
- Automation
- GUI and command-line modes support batch files, schedulers and Windows Task Scheduler integration. · sqledit.com, 30 Sept 2026
- Database connectivity
- Supported unified interfaces are ODBC, IDAPI and OLE DB, with native Oracle Call Interface support also available. · sqledit.com, 30 Sept 2026
- Filtering
- MySQL schema object and owner/schema filtering supports exclude and include options. · sqledit.com, 30 Sept 2026
- Integration
- The MySQL-focused page states that DTM Schema Comparer directly integrates with DTM Data Comparer. · sqledit.com, 30 Sept 2026
- Licensing
- A single license permits one installation on one computer, with a second copy allowed for the primary user's portable computer. · sqledit.com, 30 Sept 2026
- Multivendor databases
- The product can compare MySQL with Microsoft SQL Server or Sybase schemas and DB2 with Microsoft SQL Server or MySQL schemas. · sqledit.com, 30 Sept 2026
- Platform limits
- The download page lists Win32 Unicode and x64 Unicode demo builds, and the system requirements list Windows XP through Windows 10 desktop editions plus Windows Server versions. · sqledit.com, 30 Sept 2026
- Privacy and security
- DTM soft says its free, demo and commercial products contain no adware or spyware and collect no information unless user-activated logging is enabled. · sqledit.com, 30 Sept 2026
- Purpose
- DTM Schema Comparer compares and synchronizes database schemas, including tables, columns, views, indexes, triggers, keys, comments and stored procedures. · sqledit.com, 30 Sept 2026
- Reporting
- The product provides HTML comparison reports with three levels of information presentation. · sqledit.com, 30 Sept 2026
- Support
- DTM soft technical support may request ERROR.LOG files for technical purposes and says the information is not provided to third parties. · sqledit.com, 30 Sept 2026
- Synchronization
- The tool can compare or synchronize an entire schema or a selected part and can create a .SQL synchronization script without performing synchronization. · sqledit.com, 30 Sept 2026
- Text comparison
- It includes a built-in database-object text comparison tool and can use an external text comparison tool. · sqledit.com, 30 Sept 2026
- Visual comparison
- Schemas are shown as trees with synchronous navigation, and comparison results use red, green and yellow indicators for different, orphaned and equal objects. · sqledit.com, 30 Sept 2026
Where DTM Schema Comparer stands on Freedom251
- Database Schema Comparison Tools#19 of 25