Exists

Returns True if values exist in the table specified.

IIf

Conditional function. Returns one of two expressions, based on evaluation of an expression.

IsArray

Determines if type of an expression is an array or JSON array.

IsBoolean

Determines if type of an expression is boolean.

IsDate

Determines if type of an expression is date.

IsEmpty

Determines if an expression if empty.

IsNull

Determines if an expression is null.

IsNumber

Determines if type of an expression is number.

IsObject

Determines if an identifier is an object variable.

IsString

Determines if type of an expression is string.