Select specific or all columns
select * from 表名
select * from Student
select 列名，列名... from 表名
select name,age,email from Student
Distinct rows
select distinct 列名 from 表名
select distinct name from Student
Filtering with where clause(子句)
select * from Student where age>18
Wild Cards in SQL Server
Joining multiple conditions using AND and OR operators
select * from Student where age>18 and name like 'gester%' or gender=1
Sorting rows using order by
select name,email from Student
order by name
Selecting top n or top n percentage of rows
select top 10 * from Student
