SQL OperatorThere are various types of SQL operator:
SQL Arithmetic OperatorsLet's assume 'variable a' and 'variable b'. Here, 'a' contains 20 and 'b' contains 10. Operator  Description  Example 

+  It adds the value of both operands.  a+b will give 30    It is used to subtract the righthand operand from the lefthand operand.  ab will give 10  *  It is used to multiply the value of both operands.  a*b will give 200  /  It is used to divide the lefthand operand by the righthand operand.  a/b will give 2  %  It is used to divide the lefthand operand by the righthand operand and returns reminder.  a%b will give 0 
SQL Comparison Operators:Let's assume 'variable a' and 'variable b'. Here, 'a' contains 20 and 'b' contains 10. Operator  Description  Example 

=  It checks if two operands values are equal or not, if the values are queal then condition becomes true.  (a=b) is not true  !=  It checks if two operands values are equal or not, if values are not equal, then condition becomes true.  (a!=b) is true  <>  It checks if two operands values are equal or not, if values are not equal then condition becomes true.  (a<>b) is true  >  It checks if the left operand value is greater than right operand value, if yes then condition becomes true.  (a>b) is not true  <  It checks if the left operand value is less than right operand value, if yes then condition becomes true.  (a<b) is true  >=  It checks if the left operand value is greater than or equal to the right operand value, if yes then condition becomes true.  (a>=b) is not true  <=  It checks if the left operand value is less than or equal to the right operand value, if yes then condition becomes true.  (a<=b) is true  !<  It checks if the left operand value is not less than the right operand value, if yes then condition becomes true.  (a!=b) is not true  !>  It checks if the left operand value is not greater than the right operand value, if yes then condition becomes true.  (a!>b) is true 
SQL Logical OperatorsThere is the list of logical operator used in SQL: Operator  Description 

ALL  It compares a value to all values in another value set.  AND  It allows the existence of multiple conditions in an SQL statement.  ANY  It compares the values in the list according to the condition.  BETWEEN  It is used to search for values that are within a set of values.  IN  It compares a value to that specified list value.  NOT  It reverses the meaning of any logical operator.  OR  It combines multiple conditions in SQL statements.  EXISTS  It is used to search for the presence of a row in a specified table.  LIKE  It compares a value to similar values using wildcard operator. 
