Check if a field is unique

If TRUE, then all values for that field MUST be unique within the data file in which it is found.

constraints.checkUnique(constraint, value)

Arguments

constraint	set TRUE to check unique values
value	value to check

Value

TRUE if field is unique

See also

Constraints specifications

Examples

constraints.checkUnique(constraint = FALSE, value = "any")
#> [1] TRUE

constraints.checkUnique(constraint = TRUE, value = "any")
#> [1] TRUE