sql - 最接近平均值 SQL

Question

我正在寻找一个查询来获取与所有值的平均值最接近的值。例如，我在 A 列中有值 - 1 , 2, 8 平均值为 3.667 。所以我希望查询返回 2，因为它最接近平均值。

Answer 1

SELECT TOP 1 myTable.*
FROM myTable
CROSS JOIN (SELECT AVG(A) AS averageA FROM myTable) AS averageA
ORDER BY ABS(averageA.averageA - myTable.A)

SQL小提琴

Answer 2

SELECT number, ABS(number - (SELECT AVG(number) FROM numberTable)) AS deviation 
FROM numberTable 
ORDER BY deviation ASC 
LIMIT 1;

Answer 3

SELECT MAX(A)
FROM myTable
WHERE A < (SELECT AVG(A) AS averageA FROM myTable)