Concatenates input values, including NULL values, into an array.

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Syntax

ARRAY_AGG(<expression>)

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Parameters

ParameterDescriptionSupported input type
<expression>Expression of any type to be accumulated into an array.Any

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Return Type

ARRAY of the same type as the input data. If there is no input data, ARRAY_AGG returns NULL.

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Example

For the following example, see the player_information table:

nicknameplayerid
stephen701
burchdenise7
sabrina21NULL

The following code example code selects the columns in the player_information table and returns the values in two arrays, nicknames and playerids:

SELECT
  ARRAY_AGG(nickname) AS nicknames,
  ARRAY_AGG(playerid) AS playerids
FROM
	price_list;

Returns

{'stephen70', 'burchdenise', 'sabrina21'}, {1, 7, NULL}

The following code example shows that if a filter is added to the query which rejects all rows, ARRAY_AGG will return NULL:

SELECT
  ARRAY_AGG(nickname) AS nicknames,
  ARRAY_AGG(playerid) AS playerids
FROM
	price_list
WHERE
  playerid = 42;

Returns

NULL, NULL