#Sql語句 創建一表格 create table user3(id int(11),name varchar(32),age int (3),sex char(1));#添加語句 insert into user3(id ,name,age,sex)values(1,'張三',99,'男'); insert into user3 values(4,'王五',21,'男'); #刪除 delete from user3;#user3中所有數據全刪 delete from user3 where name='張三'; delete from user3 where name='張三' and age=99;#and 出現在條件與條件之間 delete from user3 where name='張三' & age=99;#？？？為何沒效果 &最好不用，Java中轉義字符 #修改 update user3 set sex='女' where name='李四' and age=22; update user3 set sex='女',age=2 where name='李四' and age=22;#同時改多個 #查詢 select name,id,age,sex from user3;#查詢所有 select * from user3;#查詢所有 順序 select name from user3;#查詢所有姓名 select id,name,age,sex from user3 where name='李四' and age=2; select id,name,age,sex from user3 where name='李四' or age=2;select * from user3 order by id asc;#按id 升序排列 select * from user3 order by id desc;#按id 降序排列

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轉載于:https://www.cnblogs.com/kimsimple/p/5697096.html

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