如何在单个表中添加22,000,000个记录时增加oracle查询？

Question

我在Windows Server 2003上安装了oracle 10g.我在单个表中有22,000,000条记录,这是一个事务表,
增加了同一个表中的记录.每月50,000.

我的问题是,每当我对它运行查询时,我的查询总是太慢.有没有什么方法可以提高查询的性能,比如分区表还是其他方法？

查询是

select a.prd_code
       , a.br_code||'-'||br_title
       , a.size_code||'-'||size_title
       ,size_in_gms
       , a.var_code||'-'||var_title
      , a.form_code||'-'||form_title
      , a.pack_code||'-'||pack_title
      , a.pack_type_code||'-'||pack_type_title
      , start_date
      , end_date
      , a.price
from   prices a
       , brand br
       ,  (select distinct prd_code
                 , br_code
                 ,  size_code
                 , var_code
                 , form_code
                 ,packing_code
                 ,  pack_type_code 
            from cphistory 
            where prd_code = '01' 
            and flag = 'Y'  
            and project_yy = '2009' and '01' and '10') cp
       , (select prd_code
                , br_code
                , size_code
                , size_in_gms
          from sizes 
          where prd_code = '01' 
          and end_date = '31-dec-2050' 
          and flag = 'Y') sz
        ,  (select prd_code
                   , br_code
                   , var_code
                   , var_title 
              from varient) vt
          , (select prd_code
                    , br_code
                    , form_code
                    , form_title 
             from form) fm
          ,  (select prd_code
                     , pack_title 
               from package) pc
          ,    (select prd_code
                       , pack_type_title
                 from pakck_type) pt
where a.prd_code = br.prd_code 
and   a.br_code  = br_br_code
and   a.prd_code = sz.prd_code
and   a.br_code  = sz.br_code
and   a.size_code = sz.size_code
and   a.prd_code  = vt.prd_code
and   a.br_code   = vt.br_code
and   a.var_code  = vt.var_code
and   a.prd_code  = fm.prd_code
and   a.br_code   = fm.br_code
and   a.form_code = fm.form_code
and   a.prd_code  = pc.prd_code
and   a.br_code   = pc.br_code
and   a.pack_code = pc.pack_code
and   a.prd_code  = pt.prd_code
and   a.pack_type_code = pt.pack_type_code
and   end_date = '2009'
and   prd_code = '01'
order by a.prd_code
         , a.br_code
         , a.size_code
         , a.var_code
         , a.pack_code
         , a.form_code

此查询中使用的表是:

prices    : has more than 2.1M rows
cphistory : has more than 2.2M rows
sizes     : has more than 5000 rows
brand     : has more than 1200 rows
varient   : has more than 1800 rows
package   : has more than 200 rows
pack_type : has more than 150 rows

Answer 1

1. 检查索引.确保您有一个主键.备用候选键应具有唯一约束和索引.
2. 对查询运行EXPLAIN PLAN,并查看优化程序如何运行它们.如果看到TABLE SCAN,请添加索引.
3. 确保优化程序使用统计信息使其工作更轻松.
4. 如果必须,将历史数据移动到仓库中.

22M的记录并不是那么大.