The following SQL works in 11g but not in TimesTen
This is a simple test on hs.sales table in oracle 11g. You can easily do it yourself
Created sales table in TimesTen in the image of hs.sales as follows:
Command> desc sales;
Table HR.SALES:
Columns:
PROD_ID NUMBER NOT NULL
CUST_ID NUMBER NOT NULL
TIME_ID DATE NOT NULL
CHANNEL_ID NUMBER NOT NULL
PROMO_ID NUMBER NOT NULL
QUANTITY_SOLD NUMBER (10,2) NOT NULL
AMOUNT_SOLD NUMBER (10,2) NOT NULL
Spooled out rows (comma separated) from 11g to a flat file and used ttbulkcp to import them into TimesTen
ttbulkcp -i -s "," DSN=ttdemo1 SALES /var/tmp/abc.log
So far so good
Command> select count(1) from sales;
< 918843 >
Run the following code in Oracle 11g
select cust_id "Customer ID",
2 count(amount_sold) "Number of orders",
3 sum(amount_sold) "Total customer's amount",
4 avg(amount_sold) "Average order",
5 stddev(amount_sold) "Standard deviation"
6 from sales
7 group by cust_id
8 having sum(amount_sold) > 94000
9 and avg(amount_sold) < stddev(amount_sold)
10 order by 3 desc
11 ;
Customer ID Number of orders Total customer's amount Average order Standard deviation
11407 248 103412.66 416.986532 623.479751
10747 256 99578.09 388.976914 601.938312
42167 266 98585.96 370.62391 592.079099
4974 235 98006.16 417.047489 625.670115
12783 240 97573.55 406.556458 591.6785
6395 268 97010.48 361.979403 577.991448
2994 227 94862.61 417.89696 624.53793
429 231 94819.41 410.473636 615.038404
1743 238 94786.13 398.26105 582.26845
9 rows selected.
The same code in TimesTen fails
Command> select cust_id "Customer ID",
count(amount_sold) "Number of orders",
sum(amount_sold) "Total customer's amount",
avg(amount_sold) "Average order",
stddev(amount_sold) "Standard deviation"
from sales
group by cust_id
having sum(amount_sold) > 94000
and avg(amount_sold) < stddev(amount_sold)
order by 3 desc;
*2811: Not a group by expression*
The command failed.
Any ideas what is causing this problem?
Thanks
I suppose we can write our own user defined function to work out STDDEV in TT.
Command> select sqrt((sum(power(AMOUNT_SOLD * 1.0, 2)) - (COUNT(1) * POWER(AVG(AMOUNT_SOLD * 1.0), 2)))/(COUNT(1) -1)) FROM SALES;
< 273.172955207024629817079833788659174255 >
1 row found.
In Oracle 11g on the same table (1 million rows) it returns
[email protected]> set timing off
[email protected]> set numwidth 20
[email protected]> select sqrt((sum(power(AMOUNT_SOLD * 1.0, 2)) - (COUNT(1) * POWER(AVG(AMOUNT_SOLD * 1.0), 2)))/(COUNT(1) -1)) FROM SALES;
SQRT((SUM(POWER(AMOUNT_SOLD*1.0,2))-(COUNT(1)*POWER(AVG(AMOUNT_SOLD*1.0),2)))/(COUNT(1)-1))
273.1729552070246298
[email protected]> select STDDEV(AMOUNT_SOLD) from SALES;
STDDEV(AMOUNT_SOLD)
273.1729552070246298
Any volunteers to write this user defined function?
Cheers
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