Which two statements are true about the rules of precedence for operators? (Choose two.)

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

B. NULLS influence the precedence of operators in an expression

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

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

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

Correct Answer: D,E

Reference:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm
https://docs.oracle.com/cd/A87860_01/doc/server.817/a85397/operator.htm Precedence is the order in which Oracle evaluates different operators in the same expression. When evaluating an expression containing multiple operators, Oracle evaluates operators with higher precedence before evaluating those with lower precedence. Oracle evaluates operators with equal precedence from left to right within an expression.