问题描述

基本上我想运行以下查询:

Basically I want to run the following query:

INSERT INTO historical_car_stats (historical_car_stats_id, year, month, make, model, region, avg_msrp, count)
  SELECT
    my_seq.nextval,
    '2010',
    '12',
    'ALL',
    'ALL',
    region,
    sum(avg_msrp * count) / sum(count),
    sum(count)
  FROM historical_car_stats
  WHERE year = '2010'
        AND month = '12'
        AND make != 'ALL'
  GROUP BY region;

它不起作用，因为此处不允许使用序列号"SQL 错误.我怎么写才能让 Oracle 让我做我想做的事?

It doesn't work because "sequence number not allowed here" SQL error. How can I write this so Oracle will let me do what I want to do?

推荐答案

假设你想在用序列生成key之前对数据进行分组，听起来你想要像

Assuming that you want to group the data before you generate the key with the sequence, it sounds like you want something like

INSERT INTO HISTORICAL_CAR_STATS (
    HISTORICAL_CAR_STATS_ID, 
    YEAR,
    MONTH, 
    MAKE,
    MODEL,
    REGION,
    AVG_MSRP,
    CNT) 
SELECT MY_SEQ.nextval,
       year,
       month,
       make,
       model,
       region,
       avg_msrp,
       cnt
  FROM (SELECT '2010' year,
               '12' month,
               'ALL' make,
               'ALL' model,
               REGION,
               sum(AVG_MSRP*COUNT)/sum(COUNT) avg_msrp,
               sum(cnt) cnt
          FROM HISTORICAL_CAR_STATS
         WHERE YEAR = '2010' 
           AND MONTH = '12'
           AND MAKE != 'ALL' 
         GROUP BY REGION)

这篇关于Oracle SQL:在带有 Select 语句的插入中使用序列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！