Mysql分表之后的聚合统计
Posted yanximin
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对于分表数目比较少的情况，直接用union all 就行
select ring_token , sum(a.sum_partition) as total from (
select ring_token, count(1) as sum_partition from table_0 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_1 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_2 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_3 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_4 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_5 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_6 group by ring_token
union all
select ring_token, count(1) as sum_partition from table_7 group by ring_token
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