I'm trying to create a Scalar-valued user defined function to substitute my original codes. Basically, I intend to calculate the percentage of 2022 "nnooftickets" data out of the 2020 data for each period, there are 13 period in a year. Unfortunately, my user defined function codes do not work and I'm struggling spotting the issue.
The following are the original codes that works fine:
SELECT
setperiod,
SUM(nnooftickets) AS sumnnoofticketsp,
CASE
WHEN setperiod like '2023%' THEN SUM(nnooftickets) *1.00 / LAG(SUM(nnooftickets),13*(2023-2020)) OVER(ORDER BY setperiod) ELSE null
END AS nnoofticketspyoy
FROM rdg.Sales
GROUP BY setperiod
Then I created a scalar function try to replace the case statement, the codes for the scalar function is as follows:
CREATE FUNCTION [rdg].[getyoy]
(
#var BIGINT, #currentyear SMALLINT, #compareyear SMALLINT, #orderbyperiod VARCHAR, #multiplygap SMALLINT
)
RETURNS DECIMAL(18,4)
AS
BEGIN
DECLARE #YOY AS DECIMAL(18,4)
SELECT #YOY = CASE WHEN #orderbyperiod like '2023%' THEN #Var*1.00 / LAG(#Var, #multiplygap*(#currentyear - #compareyear)) OVER (ORDER BY #orderbyperiod) ELSE null END
RETURN #YOY
END
GO
Finally, I call the function using the codes below:
SELECT
setperiod,
SUM(nnooftickets) AS sumnnoofticketsp,
rdg.getyoy(SUM(nnooftickets), 2023, 2020, setperiod, 13) AS ngrosspyoy
FROM rdg.Sales
GROUP BY setperiod
However, after using the scalar function, there's no output figure (i.e. receive all NULL values) for column ngrosspyoy.
Could anyone help please?
I have prices coming in my source file like below -
78-22¼,
78-18⅝
I need to calculate these price. For example for first case result should be 78-22.25. I searched a lot but found that SQL supports few of these characters only. Is there anyway to make sure we are able to calculate for whatever value we are getting. Solution in either SQL or PowerShell could work.
You could write a PowerShell function to convert the fractions to decimals:
PS ~> ConvertTo-Decimal '18⅝'
18.625
To do so, we'll need to write a function that:
Uses regex to identify and extract the integer and fraction parts
Uses [char]::GetNumericValue() to get the decimal representation of the fraction
Outputs the sum of the two
function ConvertTo-Decimal {
param(
[Parameter(Mandatory)]
[string]$InputObject
)
if($InputObject -match '^(-?)(\d+)(\p{No})?$'){
$baseValue = +$Matches[2]
if($Matches[3]){
$baseValue += [char]::GetNumericValue($Matches[3])
}
if($Matches[1] -eq '-'){
$baseValue *= -1
}
return $baseValue
}
return 0
}
Hoo this one was fun.
If you want to do it purley in TSQL give this a tug:
DECLARE #table TABLE (Glyph NVARCHAR(2), Dec DECIMAL(8,6))
INSERT INTO #table (Glyph, Dec) VALUES
(N'¼', 1.0/4),(N'½', 1.0/2),(N'¾', 3.0/4),(N'⅐', 1.0/7),
(N'⅑', 1.0/8),(N'⅒',1.0/10),(N'⅓', 1.0/3),(N'⅔', 2.0/3),
(N'⅕', 1.0/5),(N'⅖', 2.0/5),(N'⅗', 3.0/5),(N'⅘', 4.0/5),
(N'⅙', 1.0/6),(N'⅚', 5.0/6),(N'⅛', 1.0/8),(N'⅜', 3.0/8),
(N'⅝', 5.0/8),(N'⅞', 7.0/8),(N'⅟', 1.0/1)
DECLARE #values TABLE (ID INT IDENTITY, value NVARCHAR(20))
INSERT INTO #values (value) VALUES
(N'78-22¼'),(N'78-18⅝'),(N'10+1')
;WITH sort AS (
SELECT v.*, t.*,
CASE WHEN m.value = v.value THEN
CASE WHEN t.Dec IS NOT NULL THEN REPLACE(p.value,t.Glyph,'')+dec
ELSE p.value
END
ELSE
CASE WHEN t.Dec IS NOT NULL THEN REPLACE(m.value,t.Glyph,'')+dec
ELSE m.value
END
END AS v,
CASE WHEN m.value = v.value THEN '+'
ELSE '-' END AS op,
ROW_NUMBER() OVER (PARTITION BY v.value ORDER BY CASE WHEN m.value = v.value THEN CHARINDEX(m.value,v.value) ELSE CHARINDEX(p.value,v.value) END) AS subID
FROM #values v
OUTER APPLY STRING_SPLIT(v.value,'-') m
OUTER APPLY STRING_SPLIT(v.value,'+') p
LEFT OUTER JOIN #table t
ON RIGHT(CASE WHEN m.value = v.value THEN p.value ELSE m.value END,1) = t.Glyph
)
SELECT ID, value, SUM(v * CASE WHEN subId = 1 THEN 1 WHEN op = '+' THEN 1 ELSE -1 END) AS v
FROM sort
GROUP BY ID, value
ID value v
---------------------
1 78-22¼ 55.750000
2 78-18⅝ 59.375000
3 10+1 11.000000
#values replaces your table.
disclaimer: this works, it'll probably perform like hot garbage, but it works :P
In T-SQL you could write a function like this that takes a vulgar fraction and replaces it with its decimal equivalent (this is not completely exhaustive, but handles the most common fractions, and makes a guess about whether you want .666 or .667 or something else for ⅔):
CREATE FUNCTION dbo.FractionToDecimal(#str nvarchar(255))
RETURNS TABLE
AS
RETURN
(
SELECT str = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
REPLACE(REPLACE(REPLACE(REPLACE(#str, N'¼','.25'),
N'½','.5'), N'¾','.75'), N'⅓','.333'), N'⅔','.666'),
N'⅛','.125'), N'⅜','.375'), N'⅝','.625'), N'⅞','.875')
);
Sample usage:
DECLARE #x table(str nvarchar(255));
INSERT #x VALUES(N'78-22¼'),(N'78-18⅝');
SELECT [input] = i.str, [output] = o.str
FROM #x AS i
CROSS APPLY dbo.FractionToDecimal(str) AS o;
Output:
input
output
78-22¼
78-22.25
78-18⅝
78-18.625
Working example in this fiddle.
Note there are only so many fraction codes available that you could be pulling in ... so you could add any to the above e.g. from this set but it isn't the case that you would have to handle any possible fraction, only the ones that are represented by these specific symbols. If someone passes in plain text 9/10 or 31/33 that is a completely different problem space than what you have outlined in the question.
I need a little help to understand understanding a SUM(CASE issue, mainly this section: THEN c.quantity * dbo.Get_Qty_Sum(c.Schedule_ref, c.Schedule_Line, c.master_part) END).
Here's the query :
SUM(CASE WHEN c.component LIKE '52-%' THEN c.quantity * dbo.Get_Qty_Sum(c.Schedule_ref, c.Schedule_Line, c.master_part) END) AS Ref_Qty
The scalar function, dbo.Get_Qty_Sum expects 3 parameters to be passed (c.Schedule_ref, c.Schedule_Line, c.master_part). The 3 values are taken in and then a single value is returned as shown in the example below:
CREATE FUNCTION [dbo].[Get_Qty_Sum]( #schedule_ref int, #schedule_line int, #master_part )
RETURNS INT
AS
BEGIN
RETURN #schedule_ref + #schedule_line + #master_part
END
I'm hoping that what I have paints a clear enough picture of what I am trying to accomplish:
SELECT [Date]
,[ChargeCode]
,[ChargeDescription]
,[HHY_Qty]
,[PatPrice]
, IF ISNUMERIC(HHY_Qty) AND ISNUMERIC(PatPrice)
BEGIN
CAST(HHY_Qty AS INT) * CAST(PatPrice AS INT) AS ExtAmt
END
ELSE
0 AS ExtAmt
END
FROM [dbo].[ChargeDetails]
WHERE PatientNumber = '1271'
HHY_Qty and PatPrice are both VARCHAR types in a MSSQL database. They were created with a BULK INSERT from a very very very dirty CSV from an AS400 export. Here, I am trying to do some multiplication IF the fields are numeric values, otherwise ExtAmt should be 0. Is that possible? If not,, is there a workaround?
Use a CASE statement:
CASE WHEN ISNUMERIC(HHY_Qty) = 1 AND ISNUMERIC(PatPrice) = 1 THEN CAST(HHY_Qty AS INT) * CAST(PatPrice AS INT) ELSE 0 END AS ExtAmt
I'm trying to turn this XML string into a select
I have #Schedule XML = '<days><day enabled="0">0</day><day enabled="1">1</day><day enabled="1">2</day><day enabled="1">3</day><day enabled="1">4</day><day enabled="1">5</day><day enabled="0">6</day></days>'
What I'm trying to see at the end is..
DayNumber DayEnabled
0 0
1 1
2 1
3 1
4 1
5 1
6 0
I've tried a few ways, so far nothing is working right.. I am handling this as an XML data type, I'd prefer not to use a function as this will just be in a stored procedure..
Update: Maybe I didn't explain it correctly..
I have a stored procedure, XML is one of the parameters passed to it, I need to send it to a table to be inserted, so I'm trying to do the following..
INSERT INTO tblDays (DayNumber, DayEnabled)
SELECT #XMLParsedOrTempTableWithResults
I just can't figure out how to parsed the parameter
DECLARE #myXML as XML = '<days><day enabled="0">0</day><day enabled="1">1</day><day enabled="1">2</day><day enabled="1">3</day><day enabled="1">4</day><day enabled="1">5</day><day enabled="0">6</day></days>'
DECLARE #XMLDataTable table
(
DayNumber int
,DayEnabled int
)
INSERT INTO #XMLDataTable
SELECT d.value('text()[1]','int') AS [DayNumber]
,d.value('(#enabled)[1]','int') AS [DayEnabled]
FROM #myXML.nodes('/days/*') ds(d)
SELECT * FROM #XMLDataTable
Refer:
http://beyondrelational.com/modules/2/blogs/28/posts/10279/xquery-labs-a-collection-of-xquery-sample-scripts.aspx
The XMLTABLE function is how most XML-enabled DBMSes shred an XML document into a relational result set.
This example uses DB2's syntax for XMLTABLE and an input parameter passed into a stored procedure:
INSERT INTO tblDays (DayNumber, DayEnabled)
SELECT X.* FROM
XMLTABLE ('$d/days/day' PASSING XMLPARSE( DOCUMENT SPinputParm ) as "d"
COLUMNS
dayNumber INTEGER PATH '.',
dayEnabled SMALLINT PATH '#enabled'
) AS X
;