The Developer Console is an integrated development environment with a collection of tools you can use to create, debug, and test applications in your Salesforce org.
Important Developer Console is in maintenance mode and no new features are being
added. Only security bugs of high severity are addressed.
- Open the Developer Console
It takes only a couple of clicks to open the Developer Console from Salesforce Classic or Lightning Experience. The Developer Console is an integrated development environment with a collection of tools you can use to create, debug, and test applications in your Salesforce org. - Developer Console Functionality
The Developer Console can help with many of your development tasks. - Developer Console Query Editor
You can use the Query Editor in the Developer Console to execute a SOQL query or SOSL search on the data in your organization. A SOQL query retrieves data from a single object or multiple related objects in the database. You can execute a SOQL query immediately after data is added to the database. A SOSL query is a free-form text search that retrieves multiple related or unrelated objects and fields. Using SOSL, you can retrieve data for a specific term that exists within a field. And, SOSL can tokenize multiple terms to find relevant records. It can take several minutes for data to be indexed before you can execute a query and get results. - The Developer Console User Interface
The Developer Console includes a collection of useful tools for coding, debugging, and testing applications.