如何衡量SQL填充因子值

SELECT COUNT(*) FROM table_name;
SELECT COUNT(*) * (column_count + 4) / 8192 FROM sys.sysindexes WHERE id = OBJECT_ID('table_name');

SELECT SUM(DATALENGTH(column_name)) FROM table_name;
SELECT 8192 FROM sys.sysindexes WHERE id = OBJECT_ID('table_name');

SELECT (data_size / page_size) FROM (SELECT SUM(DATALENGTH(column_name)) AS data_size FROM table_name) AS data, (SELECT 8192 AS page_size) AS page;