An operator is a reserved symbol or word/letter used to do
logical or mathematical operations in the PostgreSQL statement.
Types of Operators in PostgreSQL:
1- Arithmetic operators
2- Comparison operators
3- Logical operators
4- Bitwise operators
Arithmetic operators:
+: Addition,
Ex: a+b
-: Subtraction,
Ex: a-b
*: Multiplication,
Ex: a*b
/: Division,
Ex: a/b
%: Modulus,
Ex: a%b
^: Exponentiation,
Ex: a^b
|/: square
root, Ex: |/a
||/: Cube root,
Ex: ||/a
!: factorial,
Ex: !a
!!: factorial,
Ex: !!a
Comparison operators
=: Equal to
operator, Ex:(a = b).
!=: Not Equal
to,Ex: (a != b).
<>: Not
Equal, Ex: (a <> b).
>: Greater
Then, Ex: (a > b).
<: Less
Then, Ex:(a < b).
>=: Greater
Then Equal To, Ex:(a >= b).
<=: Less
Then Equal To, Ex: (a <= b).
Logical operators
AND: Allows the
multiple conditions in a PostgresSQL statement.
NOT: This is
negate operator. NOT EXISTS, NOT BETWEEN, NOT IN, etc.
OR: Allows to
combining multiple conditions in a PostgresSQL statement.
Bitwise operators
||: concatenation B'10001' || B'011' 10001011
&: bitwise
AND B'10001' & B'01101' 00001
|: bitwise
OR B'10001' | B'01101' 11101
#: bitwise
XOR B'10001' # B'01101' 11100
~: bitwise
NOT ~ B'10001' 01110
<<: bitwise
shift left B'10001' <<
3 01000
>>: bitwise
shift right B'10001' >>
2 00100
