Select语法格式：
SELECT[ALL|DISTINCT] select list
[INTO new_table]
FROM table_source
[WHERE search conditions]
[GROUP BY group_by_expression]
[HAVING search_conditions]
[ORDER BY order_expression[ASC|DESC]]
例如查询我的数据库里面成绩信息：
SELECT exam_No,student_ID FROM result_Info
SELECT 12*13 AS 计算结果
设置查询条件：
SELECT * FROM user_Info WHERE user_ID=’1’ and user_PWD = ‘2’
查询成绩前三名：运用函数top
SELECT top 3 成绩 FROM 成绩信息 WHERE 班级=’1’
order by 成绩 DESC
DESC(升序) ASC（降序）
INSERT语法:
INSERT[INTO] table_or_view[(column_list)] VALUES data_values
INSERT…SELECT语句语法：
INSERT table_name[column_list]
SELECT column_list
FROM table_list
WHERE search_condirions
SELECT…INTO语句语法：
SELECT
INTO new table
FROM{}[,…n]
WHERE