SQL Server---ʵÏֵݹé²éѯ£¨Ê¹Óù«¹²±í±í´ïʽ£©

1.Óï·¨ WITH cte_name ( column_name [,...n] ) AS ( --¶¨µã³ÉÔ±£¨Ãª³ÉÔ±£© SELECT column_name [,...n] FROM tablename WHERE conditions UNION ALL --µÝ¹é³ÉÔ± SELECT column_