Oracle SQL: Use sequence in insert with Select Statement(Oracle SQL:在插入中使用序列与 Select 语句)
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,因为此处不允许序列号"SQL 错误.我怎样才能写这个让 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键之前对数据进行分组,听起来你想要类似的东西
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)
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本文标题为:Oracle SQL:在插入中使用序列与 Select 语句
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