You can use the Query Editor in the Developer Console to execute a SOQL query or SOSL search on the data in your organization. The History pane displays your last 10 queries for quick reuse.Results are displayed in a Query Results grid, in which you can open, create, update, and delete records. For SOSL search results with multiple objects, each object is displayed on a separate tab.
Retrieve Query Plans Use the Query Plan tool to optimize and speed up queries done over large numbers of records. View query plans for SOQL queries, SOSL searches, reports, and list views. If custom indexes are available for your organization, use query plans to help you decide when to request a custom index from Salesforce Support.
Query Results Grid The Query Results grid displays each record as a row. You can create, update, and delete records without leaving the Developer Console. For SOSL search results with multiple objects, each object is displayed on a separate tab.