doogiePIM SQL supports these operator categories:
Arithmetic Operators
Arithmetic operators perform mathematical operations on two expressions of any of the data types of the numeric data type category.
Operator Meaning
+ (Add) Addition
- (Subtract) Subtraction
* (Multiply) Multiplication
/ (Divide) Division
Example:
SELECT (Price * Quantity) AS Total FROM Order
Comparison Operators
Comparison operators test whether or not two expressions are the same. Comparison operators can be used on all expressions except expressions of BLOB data types.
|
Operator |
Meaning |
|
= |
Equal To |
|
> |
Greater Than |
|
< |
Less Than |
|
>= |
Greater Than or Equal To |
|
<= |
Less Than or Equal To |
|
<> |
Not Equal To |
The result of a comparison operator has the Boolean data type, which has three values: TRUE, FALSE, and UNKNOWN. Expressions that return a Boolean data type are known as Boolean expressions.
If an operator that has one or two NULL expressions, returns UNKNOWN.
Expressions with Boolean data types are used in the WHERE clause to filter the rows that qualify for the search conditions
Example:
SELECT * FROM Orders WHERE (TaxRate > 0)
Logical Operators
Logical operators test for the truth of some condition. Logical operators, like comparison operators, return a Boolean data type with a value of TRUE or FALSE.
Operator Meaning
AND TRUE if both Boolean expressions are TRUE.
BETWEEN TRUE if the operand is within a range.
IN TRUE if the operand is equal to one of a list of expressions.
LIKE TRUE if the operand matches a pattern.
NOT Reverses the value of any other Boolean operator.
OR TRUE if either Boolean expression is TRUE.
IS NULL TRUE if Boolean expression is UNKNOWN
Examples:
SELECT * FROM Customer WHERE (Company LIKE '%Club%')
SELECT * FROM Orders WHERE (ShipToCity IS NOT NULL)
SELECT * FROM Orders WHERE (TaxRate BETWEEN 0 and 5) AND (AmountPaid > 1)
SELECT * FROM Orders WHERE (ShipVIA IN ('UPS', 'DHL'))
String Concatenation Operator
The string concatenation operator allows string concatenation with the addition sign (+) or concatenation sign (||), which is also known as the string concatenation operator.
Example:
SELECT (FirstName + ' ' + LastName) AS Name FROM Customers
Related Topics