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77 lines
1.9 KiB
77 lines
1.9 KiB
CREATE TABLE test_table
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(
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id INT NOT NULL,
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fname VARCHAR(30),
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job_code INT NOT NULL,
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store_id INT NOT NULL,
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PRIMARY KEY (`id`,`store_id`)
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)
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PARTITION BY RANGE (store_id)
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(
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PARTITION p0 VALUES LESS THAN (6),
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PARTITION p1 VALUES LESS THAN (11),
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PARTITION p2 VALUES LESS THAN (16),
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PARTITION p3 VALUES LESS THAN MAXVALUE
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);
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##说明当 store_id < 6 时数据放到p0 以此类推
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CREATE TABLE test_table
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(
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id INT UNSIGNED NOT NULL AUTO_INCREMENT,
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action VARCHAR(20) NOT NULL,
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timestamp TIMESTAMP NOT NULL,
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PRIMARY KEY (id, timestamp)
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)
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PARTITION BY RANGE (UNIX_TIMESTAMP(timestamp))
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(
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PARTITION p0 VALUES LESS THAN (UNIX_TIMESTAMP('2014-08-01 00:00:00')),
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PARTITION p1 VALUES LESS THAN (UNIX_TIMESTAMP('2014-11-01 00:00:00')),
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PARTITION p2 VALUES LESS THAN (UNIX_TIMESTAMP('2015-01-01 00:00:00')),
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PARTITION p3 VALUES LESS THAN (UNIX_TIMESTAMP('2015-02-01 00:00:00'))
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);
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##说明当 timestamp < 2014-08-01 00:00:00 时数据放到p0 以此类推
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CREATE TABLE test_table
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(
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id INT UNSIGNED NOT NULL AUTO_INCREMENT,
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action VARCHAR(20) NOT NULL,
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timestamp DATETIME NOT NULL,
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PRIMARY KEY (id, timestamp)
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)
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PARTITION BY RANGE (YEAR(timestamp))
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(
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PARTITION p0 VALUES LESS THAN (2013),
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PARTITION p1 VALUES LESS THAN (2014),
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PARTITION p2 VALUES LESS THAN (2015),
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PARTITION p3 VALUES LESS THAN (2016),
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PARTITION p4 VALUES LESS THAN MAXVALUE
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);
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##说明当 timestamp < 2013 时数据放到p0 以此类推
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##查看分区表中有哪些分区
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SELECT
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TABLE_NAME,
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PARTITION_NAME
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FROM
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information_schema.PARTITIONS
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WHERE
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table_schema = DATABASE ()
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AND table_name = 'test_table'
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##查看分区中有哪些数据
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SELECT * FROM test_table PARTITION (p1);
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##利用 EXPLAIN 可以看到只需搜对应的区，不会搜索所有分区
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EXPLAIN
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select * from employees where store_id=8;
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##如果分区，分区字段的值必须要在分区规则内，否则报错。
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