Collection Functions

The functions in this section apply to collection types (arrays and sets).

Some functions apply aggregation operations (such as sum) to collections. These function names all begin with APPLY.

Other functions in this section operate specifically on arrays or sets, as indicated on the individual reference pages. Array functions operate on both native array values and array values in external tables.

Notes

• Arrays are 0-indexed. The first element's ordinal position in 0, second is 1, and so on. Indexes are not meaningful for sets.
• Unless otherwise stated, functions operate on one-dimensional (1D) collections only. To use multidimensional arrays, you must first dereference to a 1D array type. Sets can only be one-dimensional.