Setting up Schema Comparison

Comparing Two Schemas

  1. Open the New Schema Comparison wizard by doing any of these actions:
  • Highlight two schemas in the Database Explorer window, holding the CTRL key, and select the New Schema Comparison option on the shortcut menu.
  • On the Comparison menu, click New Schema Comparison.
  • Open a project and in the Project Explorer window, right-click the top node of the project tree. Select the New Schema Comparison option on the menu.

  1. Click the Type fields and select what you are going to compare (two schemas or a schema and a project) from the drop-down lists.
  2. In the Connection fields, type or select the names of MySQL Server(s) connections required for comparison.


    • If no connections are found, click the New button to create new ones. When the Database Connection Properties window opens, specify the properties of the server you want to connect to.
    • You can edit the selected Source and Target connections by clicking the Edit buttons.
    • In the drop-down lists of the Connection fields, you can click the Manage… link to open the Connection Manager dialog box. It will help you to create, edit, and delete database connections.
  3. In the Database fields, type or select the names of the required databases. Each Database field shows the list of all databases available on the selected MySQL server.
  4. (Optional) If you want to ignore some schema options during comparison, go to the Options wizard page.
  5. Click the Compare button to close the wizard and start the comparison.


  • To save your time while selecting Source and Target databases, you can copy the details from one side of the wizard to the other by clicking the Copy buttons: to copy Source database details, to copy Target database details
  • To swap the Source and Target databases, click the Swap button.
  • To close the wizard and cancel the comparison, click the Cancel button.

To compare a schema and a project:

  1. Open a project to compare.
  2. Select Comparison, and then click New Schema Comparison on the top menu.
  3. In the Type field of Source or Target wizard part, select Project.
  4. Perform steps 3-5 as described above in the To Compare two schemas procedure.
  5. Click the OK button.


A schema and a project can’t be compared if a project build is not valid. Synchronization can’t be done, if a project was modified after the beginning of comparison.


The following statement from a project is ignored while comparing:

ALTER TABLE statement where more than one object is modified or where a column is modified.