mysql分区partition

创建实例：
    CREATE TABLE HASH_EMP (
        tid int,
        tname char(255)
    )
    PARTITION BY HASH (tid) PARTITIONS 8;

查看：
select partition_name,partition_expression,partition_description,table_rows from information_schema.partitions where table_schema = schema() and table_name = 'ib_origin';

https://www.cnblogs.com/shibazi/p/3832852.html

另外有几个结论：

空间差不多

无索引，分区>>不分区

有索引，分区>不分区