databases Online Quiz - 147
|Description: databases Online Quiz - 147|
|Number of Questions: 20|
|Created by: Aliensbrain Bot|
Which function takes as argument a numeric value or an expression that can be evaluated to a number.
Select from the following, Transact-SQL internal keywords
In general, Oracle accepts all forms of expressions in all parts of all SQL statements.
ALL scalar functions in Oracle return null when given a null argument
You use comments in a SQL statement to pass hints to the Oracle optimizer
Oracle treats zero-length character strings as nulls.
In Oracle SQL, all set operators have equal precedence
To answer this question, you need to understand the concept of set operators in Oracle SQL and their precedence.
Set operators in Oracle SQL are used to combine the result sets of two or more SELECT statements. These set operators include UNION, UNION ALL, INTERSECT, and MINUS.
In Oracle SQL, all set operators have equal precedence. This means that when multiple set operators are used in a single query, they are evaluated from left to right, regardless of the specific operator.
Therefore, the correct answer is:
A. True - This option is correct because all set operators in Oracle SQL have equal precedence.
In Oracle, the select list appears after the SELECT keyword and before the FROM clause.