最接近平均值SQL

Question

我正在尋找一個查詢，以獲得所有值的平均值最接近的值。 例如，我在A列中的值為-1,2,8，平均值為3.667。 所以我希望查詢返回2，因為它最接近平均值。

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)