This tutorial shows how easy it is to compare tables in Oracle with dbForge Data Compare.
Click New Data Comparison on the Start page to launch Data Comparison Wizard. You can also start other common tasks in one click without searching for a required command in the menu.
Tip: To open previous comparison projects, double-click them.
To create a database connection, click the New button in the wizard. The Database Connection Properties window appears. You can use either a direct or an Oracle client connection.
Select the Direct checkbox to connect directly. Specify the host, SID, port, user and password to connect to the Oracle server. Click OK to finish. Now you can select this connection in the drop-down list of the Connection field in the wizard.
Source is the database whose contents are inserted into Target during synchronization. Target is the database whose contents are compared and synced with Source. Click the Connection fields and select required connections for Source and Target from the drop-down list.
To swap Source and Target, click the Swap button. To set up custom mapping, click the Next button. To start the comparison, click Compare.
You can customize comparison behavior, e.g. ignore certain objects or properties. Go to the Options wizard page and select required checkboxes.
Tip: Save the comparison settings as a command line arguments file by clicking the link at the top. You can use this file later for auto-comparison and synchronization via command line.
Tip: To save the current selection of options as your defaults, click Save As My Defaults.
dbForge Data Compare offers both automatic and manual (custom) mapping. Use custom mapping to map tables, columns, and views that cannot be mapped automatically.
Tip: To discard custom mapping and restore to the default one, click the Reset button.
You can map tables and views with different data structures manually in several clicks.
Click the Map Objects button. Select Source and Target objects in the open window, then click OK. The selected pair of objects will appear in the grid on the Mapping wizard page and be compared.
Tip: To map multiple pairs of Source and Target objects without closing and opening the window multiple times, click the Map button after the first selected pair of objects. When you manually select all required objects, click OK to see them in the grid on the Mapping wizard page.
See how many columns of each object can be compared in the Comparison field of the grid.
Click the ellipsis button for the required object. A window will open and show all the columns of the selected object, as well as additional information.
Automatically mapped columns are marked with a green icon. Incompatible columns are marked with a red icon. Select required Target columns from the drop-down list and click OK.
Click the Custom Query button and write required queries for Source and Target in the corresponding SQL fields. You can select to map the query result with a table. Click Map to perform mapping and OK to close the window.
Tip: To validate queries, click the Validate button or select the Validate item from the context menu in the required SQL field.
See the full info about the compared objects in the data comparison document. The top grid shows all the compared objects. The bottom grid shows the records of the selected objects, automatically grouped by status - Identical, Different, Only in Source, and Only in Target.
Select required objects or separate records of objects to synchronize.
Tip: For better understanding, filter the objects in the top grid, e.g. to see Only in Source objects.
Use Data Synchronization Wizard to generate a standards-driven synchronization script and tune up the results according to your needs. Click the Synchronize button to generate the synchronization script immediately.
Tip: To customize synchronization, click Next and proceed to other wizard pages.
On the Options page, you can customize synchronization with a variety of options.
To see the synchronization actions and the list of warnings generated during the mapping stage, go to the Summary page.
Now Data Synchronization Wizard provides you with the synchronization script. Click the Execute button on the toolbar to execute it.
Use the SQL editor to view and edit synchronization scripts, create queries and execute them against the selected database.
Click the New SQL button to open the SQL editor.
Tip: When the query is executed, see the query results in the Data window. You will find rich data management options in the right-click menu.
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