mysql表分割槽語句記錄
阿新 • • 發佈：2019-01-28
建立分割槽表
CREATE TABLE realtable ( id int(10)unsigned NOT NULL COMMENT'表主鍵', pid int(10)unsigned NOT NULL COMMENT'產品ID', price decimal(15,2)NOT NULL COMMENT'單價', num int(11)NOT NULL COMMENT'購買數量', uid int(10)unsigned NOT NULL COMMENT'客戶ID', atime datetime NOT NULL COMMENT'下單時間', utime int(10)unsigned NOT NULL DEFAULT 0 COMMENT'修改時間', PRIMARY KEY( id , atime ) ) PARTITION BY RANGE COLUMNS(atime)( PARTITION p24 VALUES LESS THAN('2018-01-01'), PARTITION p25 VALUES LESS THAN('2018-02-01'), PARTITION p26 VALUES LESS THAN('2018-03-01'), PARTITION p27 VALUES LESS THAN('2018-04-01'), PARTITION p28 VALUES LESS THAN('2018-05-01'), PARTITION p29 VALUES LESS THAN('2018-06-01'), PARTITION p30 VALUES LESS THAN('2018-07-01'), PARTITION p31 VALUES LESS THAN('2018-08-01'), PARTITION p32 VALUES LESS THAN('2018-09-01'), PARTITION p33 VALUES LESS THAN('2018-10-01'), PARTITION p34 VALUES LESS THAN('2018-11-01'), PARTITION p35 VALUES LESS THAN('2018-12-01'), PARTITION p36 VALUES LESS THAN MAXVALUE );
建立子分割槽表
CREATE TABLE realtable ( id int(10)unsigned NOT NULL COMMENT'表主鍵', pid int(10)unsigned NOT NULL COMMENT'產品ID', price decimal(15,2)NOT NULL COMMENT'單價', num int(11)NOT NULL COMMENT'購買數量', uid int(10)unsigned NOT NULL COMMENT'客戶ID', atime datetime NOT NULL COMMENT'下單時間', utime int(10)unsigned NOT NULL DEFAULT 0 COMMENT'修改時間', PRIMARY KEY( id , atime ) ) PARTITION BY RANGE COLUMNS(atime)( PARTITION p24 VALUES LESS THAN('2018-01-01') ( SUBPARTITION s0 DATA DIRECTORY = '/disk0/data' INDEX DIRECTORY = '/disk0/idx', SUBPARTITION s1 DATA DIRECTORY = '/disk1/data' INDEX DIRECTORY = '/disk1/idx' ), PARTITION p25 VALUES LESS THAN('2018-02-01'), PARTITION p26 VALUES LESS THAN('2018-03-01'), PARTITION p27 VALUES LESS THAN('2018-04-01'), PARTITION p28 VALUES LESS THAN('2018-05-01'), PARTITION p29 VALUES LESS THAN('2018-06-01'), PARTITION p30 VALUES LESS THAN('2018-07-01'), PARTITION p31 VALUES LESS THAN('2018-08-01'), PARTITION p32 VALUES LESS THAN('2018-09-01'), PARTITION p33 VALUES LESS THAN('2018-10-01'), PARTITION p34 VALUES LESS THAN('2018-11-01'), PARTITION p35 VALUES LESS THAN('2018-12-01'), PARTITION p36 VALUES LESS THAN MAXVALUE );
查詢某張表的分割槽資訊
SELECT
partition_name part,
partition_expression expr,
partition_description descr,
table_rows
FROM
INFORMATION_SCHEMA.partitions
WHERE
TABLE_SCHEMA = schema()
AND TABLE_NAME='table';
檢視某個分割槽資料量
SELECT * FROM table PARTITION (partitionName);