Problem Statement
There is a custom function (UDF in javascript) written in snowflake.
This custom statement operates over a table with the window function over (partition by col name order by col name)
GET_TEST1() is the name custom function
Syntax:
select GET_TEST1(Col1, Col2) over (partition BY col3,col4 order by col6+col7, col8 DESC) from table name WHERE IND='Y'
Error:
SQL compilation error: Invalid function type [???] for window function.
I am stuck with this, I went through multiple articles but am not able to resolve it can some one help me.
UPDATES
I have gone through multiple articles and all of them convey
over(partition by....order by....) will not work on custom functions.
But the same query works in Netezza but not in Snowflake. Can some one guide me how to resolve this issue.
Related
I am using the following query to compute a running balance for my credit card. My bank does not provide running balance column on its website, so I am using a SQL query to compute it myself. This code works for me, except my IDE shows the following warning message, "Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'".
SET #running_sum = 100;
SELECT
post_date,
category,
amount,
(#running_sum := #running_sum + amount) AS running_total
FROM credit_card;
I also noticed the following statement under MySQL version 8 section 9.4 User-Defined Variables, "Previous releases of MySQL made it possible to assign a value to a user variable in statements other than SET. This functionality is supported in MySQL 8.0 for backward compatibility but is subject to removal in a future release of MySQL".
From these messages it appears to me that MySQL does not like that I am using this expression within my query (#running_sum := #running_sum + amount). However, I can't fully understand how am I supposed to re-write this query, so I can achieve the same result of computing running balance, and comply with MySQL version 8 code style.
Thank you in advance for your response.
Without ORDER BY the order of the result set is unspecified and your query could return different results on each execution.
Assuming that the result set should be sorted by post_date and the sum should start at 0 (and not at 100) the following query based on window functions yields the same result set:
SELECT
`post_date`,
`category`,
`amount`,
SUM(`amount`) OVER (ORDER BY `post_date` ASC) AS `running_total`
FROM `credit_card`;
Why the functionality was deprecated:
Important Change: Setting user variables in statements other than SET
is now deprecated due to issues that included those listed here:
The order of evaluation for expressions involving user variables was
undefined.
The default result type of a variable is based on its type at the
beginning of the statement, which could have unintended effects when a
variable holding a value of one type at the beginning of a statement
was assigned a new value of a different type in the same statement.
HAVING, GROUP BY, and ORDER BY clauses, when referring to a variable
that was assigned a value in the select expression list, did not work
as expected because the expression was evaluated on the client and so
it was possible for stale column values from a previous row to be
used.
I'm working of generating sql request by parsing Excel-like formulas.
So for a given formula, I get this request :
SELECT IF(COL1='Y', SUM(EXPR),NULL)
FROM Table
I don't get the results I want. If I manually rewrite the request like this it works :
SELECT SUM(IF(COL1='Y', EXPR, NULL))
FROM Table
Also, the first request produces the right value if I add a GROUP BY statement, for COL1='Y' row :
SELECT IF(COL1='Y', SUM(EXPR),NULL)
FROM Table
GROUP BY COL1
Is there a way to keep the first syntax IF(COND, SUM(EXPR), NULL) and slightly edit it to make it works without a GROUP BY statement ?
You have to use GROUP BY since you are using SUM - otherwise SQL engine is not able to tell how do you want to summarize the column.
Alternatively you could summarize this column only:
SELECT SUM(EXPR)
FROM Table
WHERE COL1='Y'
But then you would have to run separate query for each such column, read: not recommended for performance reasons.
When I do that on access, SELECT RMonturesImp.N°Fac
FROM RMonturesImp, Rpartielun
WHERE NOT (RMonturesImp.N°Fac IN (1,2,5))
GROUP BY RMonturesImp.N°Fac;
but when I do this
SELECT RMonturesImp.N°Fac
FROM RMonturesImp, Rpartielun
WHERE NOT (RMonturesImp.N°Fac IN Requête2)
GROUP BY RMonturesImp.N°Fac;
it doesn't work (it shows 1,2,5 indeed) although the result of Requête2 (which is a query) is also (1,2,5). I can't understand this!
Thanks in advance
It's quite easy. The IN (1,2,5)) must be explicit as SQL will not evaluate an expression not to say a function to obtain the values for IN.
So build your SQL in code creating the string, or pull the values from a (temp) table.
Try this:
SELECT RMonturesImp.N°Fac
FROM RMonturesImp, Rpartielun
WHERE RMonturesImp.N°Fac NOT IN (Select N°Fac From Requête2)
GROUP BY RMonturesImp.N°Fac;
I am writing code within SQL server 2012 to transfer into the query designer of Report Builder 3.0.
My code works perfect within Management studio, and it works within the actualy query designer, but once I press Okay within the query designer, it throws me the error:
"Could not update a list of fields for the query. Verify that you can connect to the data source and that your query syntax is correct"
Under details:
"An item with the same key has already been added"
This is the code I am using:
Select *
from
(Select distinct srt.Name,
percentile_disc(.5) WITHIN GROUP(ORDER BY (sr.price)) OVER(PARTITION BY srt.Name) AS MedianSpend
from ServiceReq sr inner join ServiceReqTemplate srt
on srt.RecId = sr.SvcReqTmplLink_RecID Where Name like '%') medQuery
inner join
(select distinct srt.Name,
cast(sum(sr.price) as int) as AvgCost,cast(sum(sr.cost) as int) as
AvgTransCost,cast(avg(sr.TotalTimeSpent) as int) as TotalTimeSpent
from ServiceReq sr, ServiceReqTemplate srt
where sr.SvcReqTmplLink_RecID = srt.RecId
group by srt.Name) avgQuery
on medQuery.Name LIKE avgQuery.Name
I think that the problem is there would be two columns both called "Name" in one table, which is not allowed. I was thinking I could add another column in the same table, and call it "Name_2" and then copy and paste all the data from the "Name" table into "Name_2" and then use it. Would this be the easiest way of successfully implementing this code into Report Builder?
You add AS Name2 to the 2nd query and then call it after avgQuery at the end.
In my table I have a field with data such as 1,61,34, and I need to see if a variable is in that.
So far I have this
SELECT id, name FROM siv_forms WHERE LOCATE(TheVariable, siteIds) > 0
Which works, with the exception that if the siteIds were 2,61,53, and TheVariable was 1, it would return the row as there is a 1 in 61. Is there anyway around this using native MySql, or would I need to just loop the results in PHP and filter the siteIds that way?
I've looked through the list of string functions in MySql and can't see anything that would do what I'm after.
Try with find_in_set function.
SELECT id, name FROM siv_forms WHERE find_in_set(TheVariable, siteIds);
Check Manual for find_in_set function.