1) Place your cursor on the search tab and click GO
2) Click on Datasets, Click analyze (illusrtated with the red arrow below) to select the select the desired database (in this case it's Financial Soundness Indicators (FSI) Balance Sheets) This would change the database in the query tool.
3) Click on Indicator and type the required indicator (in this example we are searching for "Loan Loss Provisions"). Select the indicator/currency you desire from the available options. Select countries and specify time periods to retrieve the data.
4. Below is a screen shot of a sample result.
Instructions on how to use Query can be found here.
An overview of how to export data from Tables can be found here.