很高兴能为你分享我所学习到的！
简单的Select语句
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]]设置查询条件
举例：
select *from student_Info where student_name='超人'
‘查询student_info表中，姓名是"超人"的信息
select*from student_Info where student_name='超人' and student_sex='男'
‘查询student_info表中，姓名是"超人"和性别是"男”的信息
select*from student_info where address like '中国%'
‘查询student_info表中，家庭住址以"中国"开头的信息
select*from student_Info where student_name='超人' or student_sex='男'
‘查询student_info表中，姓名是"超人"或性别是"男”的信息排序
举例
select * from result_Info where student_ID=1
order by result desc’降序排列
select * from result_Info where student_ID=1
order by result asc‘正序排列分组
举例
select exam_no ,avg(result)from result_Info group by cube(exam_no,result)
select exam_no ,avg(result)from result_Info group by rollup(exam_no,result)使用函数
select max(result)from result_Info where exam_no ='2000期中'and student_id='1'
’查询对应表中，result列中最大的值
select avg(result)from result_Info where exam_no ='2000期中'and student_id='1'
’查询对应表中，result列中平均的值
select sum(result)from result_Info where exam_no ='2000期中'and student_id='1'
’查询对应表中，result列的总和
select top 3 result from result_Info where exam_no ='2000期中'and student_id='1'
order by result [desc|adc]
‘求对应前三名按降序（升序排列）
使用Having子句
select exam_no,course_name,avg(result) from result_Info group by exam_no,course_name
having avg(result)>=70
order by exam_No 注释：可以按照自己需求进行查询的结果
插入数据
语法格式：
INSERT[INTO]table_or_view[(column_list)] VALUES data_values举例
insert into student_Info values ('122','姓名','性','2001-1-1','1','1','2009-1-1','1','')
’每一列都插入数据
insert into student_Info(student_ID ,student_Name ,address ) values ('122','姓名','1')
在选定的列中插入数据INSERT…SELECT语句
语法格式“
INSERT table_name[column_list]
SELECT column_list
FROM table_list
WHERE search_condirions举例：`
insert student1_Info
select *from student_Info
SELECT…INTO语句
SELECT <select_list>
INTO new table
FROM {<table_source>},[,...n]
WHERE <search_condition>举例：
select *
into #student2
from student_Info
where student_sex='男'
select*from #student2 注意
SELECT…INTO语句和INSERT…SELECT语句的区别是：前者是存储在一个新表中，而后者是插入到一个原有的表中!
UPDATE语句
语法格式：
UPDATE [TOP] {table_name|view_name}
SET
{column name={expression|DEFAUIT|NULL}|@variable=expression}[,...n]
WHERE {search_conditions}举例：
update student_Info set student_Name ='大梦'
where student_name ='奥拉朱旺'在UPDATE语句使FROM子句
举例：
update student1_Info set student_Sex =b.student_Sex ,address =b.address
from student1_Info a join student_Info b on a.student_Name =b.student_Name
where b.student_Sex ='女'
DELETE语句
DELETE FROM <table name>
[WHERE <search condition>]
举例：
delete from student_Info
where student_Name ='姓名'TOP关键字和TOP表达式
语法格式：
[
TOP (expression)[PERCENT]
[WITH TIES]
]举例：
declare @i int
set @i =2
select top (2) with ties *from result_Info order by result COMPUTE子句
[
COMPUTE
{{AVG|COUNT|MAX|MIN|STDEV|STDEVP|VAR|VARP|SUM}
(expression)}[,...n]
[BY expression[,...n]
]在WHERE子句使用运算符
在子句中可以使用：and or + - * % in 等等，不仅仅是只能使用等于
感谢您的光临，如果我有写的不对的地方，欢迎帮我找出来，谢谢！