Select 用途： 从指定表中取出指定的列的数据 语法： SELECT column_name(s) FROM table_name 解释： 从数据库中选取资料列，并允许从一或多个资料表中，选取一或多个资料列或资料行。SELECT 陈述式的完整语法相当复杂，但主要子句可摘要为： SELECT select_list [ INTO new_table ] FROM table_source [ WHERE search_condition ] [ GROUP BY group_by_expression ] [ HAVING search_condition ] [ ORDER BY order_expression [ ASC | DESC ] ] 例： “Persons” 表中的数据有 LastName FirstName Address City Hansen Ola Timoteivn 10 Sandnes Svendson Tove Borgvn 23 Sandnes Pettersen Kari Storgt 20 Stavanger 选出字段名” LastName”、” FirstName” 的数据 SELECT LastName,FirstName FROM Persons 返回结果: LastName FirstName Hansen Ola Svendson Tove Pettersen Kari