max varchar http mysql tom 數據 details 準備 from

源 https://blog.csdn.net/apple001100/article/details/75451999

目的：為了了解mysql單表分區方法，特此作為學習筆記記錄一下。

一。準備表，創建一個學生表，包含主鍵sid和名稱sname字段

create table students(
sid int(5) primary key,
sname varchar(24)
);

二。準備數據

insert into students(sid,sname) values(10003,‘tom‘);
insert into students(sid,sname) values(10005,‘jerry‘);
insert into students(sid,sname) values(10006,‘hengte‘);

insert into students(sid,sname) values(10007,‘weilian‘);
insert into students(sid,sname) values(10000,‘tom1‘);
insert into students(sid,sname) values(10001,‘jerry2‘);
insert into students(sid,sname) values(10002,‘hengte3‘);
insert into students(sid,sname) values(10004,‘weilian4‘);

三。查詢結果

select * from sutdents

四。建立分區，按照主鍵ID的值進行設定分區規則如下：

alter table students partition by range(sid)
(
partition p0 values less than (10001),
partition p1 values less than (10003),
partition p2 values less than (10005),
partition p3 values less than maxvalue
);

五。查詢結果，可以看到查詢結果分布到不同的分區裏

select * from students partition (p0);

select * from students partition (p1);

select * from students partition (p2);

select * from students partition (p3);

六。驗證新插入數據

insert into students(sid,sname) values(10011,‘tom12‘);
insert into students(sid,sname) values(10012,‘jerry13‘);
insert into students(sid,sname) values(10013,‘hengte14‘);
insert into students(sid,sname) values(10014,‘weilian15‘);
insert into students(sid,sname) values(10015,‘tom116‘);
insert into students(sid,sname) values(10016,‘jerry22‘);
insert into students(sid,sname) values(10017,‘hengte32‘);
insert into students(sid,sname) values(10018,‘weilian42‘);

七。再次查詢分區數據，會看到新插入的數據按照分區規則劃分到對應的分區裏了

select * from students partition (p0);

select * from students partition (p1);

select * from students partition (p2);

select * from students partition (p3);

mysql單表分區