说明：几个简单的基本的sql语句 　　选择：select from table1 where 范围 　　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 　　查找：select from table1 where field1 like '%value1%' ---like的语法很精妙，查资料! 　　排序：select from table1 order by field1,field2 [desc] 　　总数：select count as totalcount from table1 　　求和：select sum(field1) as sumvalue from table1 　　平均：select avg(field1) as avgvalue from table1 　　最大：select max(field1) as maxvalue from table1 　　最小：select min(field1) as minvalue from table1