常用的sql语句
增加一个列
Alter table tabname add column col type
?
插入：insert into table1(field1,field2) values(value1,value2)
?
删除：delete from table1 where 范围
?
更新：update table1 set field1=value1 where 范围
?
排序：select * from table1 order by field1,field2 [desc]
