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Supported query operators & data types

The following operators and data types are supported by the SQL-like query language in API BaaS.

Equality operators

Purpose Operator
Less than

'<' or 'lt'

Less than equal

'<=' or 'lte'


'=' or 'eq'

Greater than equal

'>=' or 'gte'

Greater than

'>' or 'gt'

Not equal

NOT <some_expression>

Logical operators

Purpose Operator
Intersection of results


Union of results


Subtraction of results


Data types

As you develop queries, remember that entity properties each conform to a particular data type. For example, in the default entity User, the name property is stored as a string, the created date as a long, and metadata is stored as a JSON object. Your queries must be data type-aware to ensure that query results are as you expect them to be.

For example, if you create an entity with a price property with a value of 100.00, querying for 100 will return no results, since the API expected a decimal-delimited float value in your query.

For a list of property data types for each default entities, see Default Data Entity Types.

Data Type Examples
string 'value', unicode '\uFFFF', octal '\0707'

Timestamps are typically stored as long values.

10.1, -10.1, 10e10, 10e-10, 10E10, 10E-10

Your query must be specific about the value you're looking for, down to the value (if any) after the decimal point.

true | false

For a JSON object like this one:

 "items": [
   "name": "rocks"
   "name": "boats"

you can use dot notation to reach property values in the object:

/mycollection/thing?ql="select * where items.name = 'rocks'"

Objects are often used to contain entity metadata, such as the activities associated with a user, the users associated with a role, and so on.

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