+

Plus sign for addition.

-

Minus sign for subtraction

*

Multiply sign for multiplication

/

Divide by sign for division

||

Character string concatenation

(

Open parenthesis, for grouping operations

)

Close parenthesis, for grouping operations

>

Greater than sign, indicating values higher than the comparison

<

Less than sign, indicating values lower than the comparison

=

Equal sign, indicating the same value

<=

Less than or equal to sign, indicating values the same or lower than the comparison

>=

Greater than or equal to sign, indicating values the same or higher than the comparison

<>

Not equal to, indicating values higher or lower, but not the same

AND

AND connective, indicating intersection with one or more conditions to form a compound condition

OR

OR connective, indicating the union with one or more conditions to form a compound condition

NOT

NOT connective, indicating a condition is not met

,

Comma, used to separate elements in a list