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insert into students (name, gender) values ("小乔", 2);
# 插入两条数据
insert into students (name, gender) values("小乔", 2),("大乔", 2);
insert into 表1(字段1,字段2,字段3)select * from 表2;
update students set gender=1; # --全部修改
update students set gender=1 where name="小李飞刀"; # --只要name是小李飞刀的,全部修改
update students set gender=1, age=22 where id=3; # -- 只要id是3的进行修改
delete from students where id=3;
update students set isdelete=1 where id=3;
delete from students where id=3;
truncate table students;
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