1z0-071 Exam Dumps | Which two statements are true about the rules of precedence for operators?

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Question 137/139

Which two statements are true about the rules of precedence for operators?

A. Arithmetic operators with equal precedence are evaluated from left to right within an expression.

B. Multiple parentheses can be used to override the default precedence of operators in an expression.

C. The + binary operator has the highest precedence in an expression in a SQL statements.

D. NULLS influence the precedence of operators in an expression.

E. The concatenation operator || is always evaluated before addition and subtraction in an expression.

Correct Answer: A,B

A). True, arithmetic operators of equal precedence are evaluated from left to right within an expression, according to the standard SQL operator precedence. B. True, multiple parentheses can be used in an expression to change the order of operations and override the default precedence of operators.
C, D, and E are not correct because: C. The + binary operator does not have the highest precedence; multiplication and division have higher precedence in SQL. D. NULLS do not influence the precedence of operators in an expression; they may affect the result of an operation but not the order in which operators are evaluated. E. The concatenation operator (||) has lower precedence than arithmetic operators in SQL expressions.
References:
* Oracle documentation on operator precedence: Oracle Database SQL Language Reference

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