如何在連接到 Redshift 的 DBeaver 中使用 SQL 連接 2 列

Question

這是一個示例表：

 account_no     season      animal 
      A         spring      sheep
      A         spring      cow
      A         winter      pig
      B         winter      lamb

我正在使用連接到 Redshift 的 DBeaver，我想 GROUP BY account_no和season並將動物連接到一個列中，如下所示：

account_no      season     animalList 
     A          spring     sheep, cow
     A          winter     pig   
     B          winter     lamb         

我已經嘗試過STRING_AGG function 例如

SELECT STRING_AGG(animal,',') AS animalList
FROM Animals
GROUP BY account_no, season

但是，我收到以下錯誤：

Error occurred during SQL query execution

Reason: SQL Error [500310] [42883]: [Amazon](500310) Invalid operation: function string_agg(character varying, "unknown") does not exist;

我已嘗試按照其他線程的建議添加 varchar，但我仍然遇到相同的錯誤

 SELECT STRING_AGG(animal: : varchar,',') AS animalList
    FROM Animals
    GROUP BY account_no, season

感謝你的幫助！

Answer 1

Redshift 調用 function listagg() ：

SELECT LISTAGG(animal, ',') WITHIN GROUP (ORDER BY animal) AS animalList
FROM Animals
GROUP BY account_no, season;

這並非不合理，因為這是 function 的標准名稱。