用SQL查詢出每門成績都大于80分的學生姓名?
代碼如下:select name from stu group by name having min(fs)>=80。還有這些簡單語句。簡單基本的sql語句更新:
update table1 set field1=value1 where 范圍查找:
select * from table1 where field1 like ’%value1%’ (所有包含‘value1’這個模式的字符串)
排序:
select * from table1 order by field1,field2 [desc]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[separator]