1.測試添加分區和刪除分區 ###添加刪除range分區 (1)建立一個分區: CREATE TABLE titles ( emp_no INT NOT NULL, title VARCHAR(50) NOT NULL, from_date DATE NOT NULL, to_date DATE, KEY (emp_no), PRIMARY KEY (emp_no,title, from_date) ) partition by range columns(from_date) (partition p01 values less than ('1985-12-31'), partition p02 values less than ('1990-12-31'), partition p03 values less than ('1995-12-31'), partition p04 values less than ('2000-12-31'), partition p05 values less than ('2005-12-31'), partition p06 values less than ('2010-12-31'), partition p07 values less than ('2015-12-31'), partition p08 values less than ('2020-12-31'), partition p09 values less than ('2025-12-31'), partition p10 values less than ('2030-12-31') ); 導入數據 mysql> source titles.sql (2)添加分區: 備註:不能超過p04的範圍,嚴格遞增每一個分區,即最小不能小於前一個分區 下面新曾了兩個分區n01和n02 alter table titles reorganize partition p04 into( partition n01 values less than('1997-12-31'), partition n02 values less than('1998-12-31'), partition p04 values less than('2000-12-31') ); (3)刪除分區: 刪除分區即刪除數據。 mysql> select count(*) from titles where from_date<'1985-12-31'; +----------+ | count(*) | +----------+ | 18238 | +----------+ 1 row in set (0.09 sec) mysql> alter table titles drop partition p01; Query OK, 0 rows affected (0.05 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> select count(*) from titles where from_date<'1985-12-31'; +----------+ | count(*) | +----------+ | 0 | +----------+ 1 row in set (0.04 sec) ###添加刪除list分區 (1)建立list分區 CREATE TABLE titles ( emp_no INT NOT NULL, title VARCHAR(50) NOT NULL, from_date DATE NOT NULL, to_date DATE, KEY (emp_no), PRIMARY KEY (emp_no,title, from_date) ) partition by list columns(title) ( partition p0 values in ('Assistant Engineer'), partition p1 values in ('Engineer'), partition p2 values in ('Manager'), partition p3 values in ('Senior Engineer'), partition p4 values in ('Senior Staff'), partition p5 values in ('Staff'), partition p6 values in ('Technique Leader') ); 導入數據 titles.sql 是employees數據庫導出的數據 mysql> source titles.sql (2)添加分區 mysql> alter table titles add partition(partition p7 values in('CEO')); Query OK, 0 rows affected (0.07 sec) Records: 0 Duplicates: 0 Warnings: 0 (3)刪除分區: mysql> alter table titles drop partition p0; Query OK, 0 rows affected (0.04 sec) Records: 0 Duplicates: 0 Warnings: 0 ###添加刪除hash分區 (1)建立hash分區 CREATE TABLE titles ( emp_no INT NOT NULL, title VARCHAR(50) NOT NULL, from_date DATE NOT NULL, to_date DATE, KEY (emp_no), PRIMARY KEY (emp_no,title, from_date) ) partition by hash(emp_no) partitions 4; 導入數據: mysql> source titles.sql (2)刪除hash分區 4個分區減小到兩個,4-2=2 mysql> alter table titles coalesce partition 2; Query OK, 443308 rows affected (12.41 sec) Records: 443308 Duplicates: 0 Warnings: 0 (3)添加hash分區 增長到5個,2+3=5 mysql> alter table titles add partition partitions 3; Query OK, 443308 rows affected (11.54 sec) Records: 443308 Duplicates: 0 Warnings: 0 ###添加刪除key分區 (1)建立key分區 CREATE TABLE titles ( emp_no INT NOT NULL, title VARCHAR(50) NOT NULL, from_date DATE NOT NULL, to_date DATE, KEY (emp_no), PRIMARY KEY (emp_no,title, from_date) ) partition by key(emp_no) partitions 4; 導入數據 mysql> source titles.sql (2)刪除分區,同hash mysql> alter table titles coalesce partition 2; Query OK, 443308 rows affected (7.86 sec) Records: 443308 Duplicates: 0 Warnings: 0 (3)添加分區,同hash mysql> alter table titles add partition partitions 3; Query OK, 443308 rows affected (6.17 sec) Records: 443308 Duplicates: 0 Warnings: 0