Logical operators in Azure Cosmos DB for NoSQL
APPLIES TO: 
NoSQL
Logical operators in Azure Cosmos DB for NoSQL compare two different expressions with boolean (true/false) operands.
Understanding logical (AND, OR and NOT) operators
Logical operators operate on boolean values. The following tables show the logical truth tables for each operator.
OR operator
The OR operator returns true when either of the conditions is true.
true |
false |
undefined |
|
|---|---|---|---|
true |
true |
true |
true |
false |
true |
false |
undefined |
undefined |
true |
undefined |
undefined |
AND operator
The AND operator returns true when both expressions are true.
true |
false |
undefined |
|
|---|---|---|---|
true |
true |
false |
undefined |
false |
false |
false |
false |
undefined |
undefined |
false |
undefined |
NOT operator
The NOT operator reverses the value of any boolean expression.
NOT |
|
|---|---|
true |
false |
false |
true |
undefined |
undefined |
Operator Precedence
The logical operators OR, AND, and NOT have the precedence level indicated here.
| Priority | |
|---|---|
NOT |
1 |
AND |
2 |
OR |
3 |
* operator
The special operator * projects the entire item as is. When used, it must be the only projected field. A query like SELECT * FROM products p is valid, but SELECT VALUE * FROM products p or SELECT *, p.id FROM products p aren't valid.