The SQL query above is requesting specific information from a database. Specifically, it seeks to extract the product_id and product_name from a table named product_obj_table, but only for those entries where the product_id equals 39.
To further explain, let's break it down:
- SELECT: This is a SQL command used to fetch data from a database. It is followed by the names of the columns you want to retrieve. Here, product_id and product_name are the columns that will be returned from the product_obj_table.
- FROM: This command specifies from which table in the database the system will pull the data. Here, it's the product_obj_table.
- WHERE: This clause is used to filter records, ensuring that only relevant data is fetched. It includes a condition that the data must meet. Here, it only pulls records where product_id equals 39.
Thus, the request is seeking to find the product name associated with the product ID of 39 from the table named product_obj_table. The information returned should include the specific product_id and product_name for this item, if it exists.
The Oracle database allows you to access information about the most recently executed implicit cursor by referencing the special implicit cursor attributes.
Because the cursors are implicit, they have no name, and therefore the keyword
SQL is used to denote the implicit cursor.