In Oracle, a calculated field such as item_price * item_quantity differs from a table field in what way? Question 26 options: 1) A calculated field should be saved in the table after its value has been computed. 2) There is no difference. They are just synonyms for the same concept. 3) A calculated field's value appears in the output of a SELECT statement, but it is not physically stored as a field in the table. 4) A sum cannot be computed for a calculated field.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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