T-SQL (SS2K8) :: XQuery Syntax To Evaluate Math Formula
Feb 25, 2015
I want to evaluate a math formula inside of a function, so I can't use dynamic SQL.
I found that the query on an XML-variable with a literal works well.
DECLARE @sParsedFormula varchar(200);
DECLARE @xFormula xml;
SET @xFormula = '';
SET @sParsedFormula = '1+2';
SELECT @xFormula.query('3+3') , @xFormula.query('sql:variable("@sParsedFormula")')Output (1st value is correctly evaluated, 2nd not):
"6", "1+2"
I can't directly pass @sParsedFormula to the query otherwise I get "The argument 1 of the XML data type method "query" must be a string literal". What is the correct XQuery-syntax to evaluate the SQL:variable?
All I want to do is create a UDF that will evaluate these strings as math formula and return the value depending on the values of the other columns in the row.
Bear in mind that there may not be a string formula at all for some rows, in which case the value of teh Hours column alone should be the result.
I can do this in vb using the 'Replace' function but am having difficulty in translating it over to T-SQL.
Here is the vb version i use in Ms Access...
getFormula(strDutyType As String, dblTotalNumber As Double, dblWeightingAs Double, dblHours As Double, dblMinutes As String, strFormula As Variant)
If IsNull(strFormula) Or strFormula = "" Then getFormula = dblHours Exit Function End If
Entity Value A 2424053.500000 B 1151425.412500 C 484810.700000 Table 2 contains
Entity Formula A (2100*(1-0.0668)*24*mday*10) B (1000*(1-0.0575)*24*mday*10) C (1260*(1-0.09)*24*mday*10)
Where mday is number of days taken from user
I need to calculate the output of value/formula for each entity can you provide me the query for the same
The datatype for formula column is varchar
I do not have the liberty to use cursors or loops.mday will be a input fromt the user say 'mday = 31' ..i need to divide the value in the first table with the computed value of the formula after replacement
I am having 4 Columns Qty decimal(12,3),CF1 Decimal(12,3),CF2 Decimal(12,3),Flag TinyInt.
I want to perform following without using case if it is possible.
When value of Flag is 0 then Qty*(CF2/CF1) When value of Flag is 1 then Qty
And i Don't want to use any functions like isnull,NullIf,IIF even not union or union all.How to do this calculation without using any function.
Actually i am having more then 100000 rows in table and if i use functions then my index might not be called.,that why want to avoid cases and functions.
I have a column which needs to be 9 digits long. The first four digits are independent from the other digits. The following digits need to be 5 and I have to add leading zeros if they're less than 5. This is an awful design and I'd love to change it but I can't.
[code = "sql"]CREATE TRIGGER Trigger_20321 ON FACT_CUST_GRP_ICM_MO AFTER DELETE AS /* DELETE trigger on FACT_CUST_GRP_ICM_MO */ /* default body for Trigger_20321 */
[Code]...
Msg 102, Level 15, State 1, Procedure Trigger_20321, Line 21 Incorrect syntax near ')'.
This query is the first time I am using the Unpivot syntax and I am coming across a problem. When I try to unpivot my data, I get the following statement:
"Msg 4104, Level 16, State 1, Line 2 The multi-part identifier "Table3.DocketId" could not be bound."
What is the cause of this issue?
Select Table3.DocketId, UP.AssignmentType, Up.AssignedStaff From ( Select distinct Table2.DocketId,
Does anyone know why this works: SELECT [MyXmlColumn].query('/root') FROM [MyDatabase].[dbo].[MyTable] But this produces an error: SELECT [MyDatabase].[dbo].[MyTable].[MyXmlColumn].query('/root') FROM [MyDatabase].[dbo].[MyTable]
System.Data.SqlClient.SqlException: Invalid column name 'MyXmlColumn'.
I have the following XML in an XML column in a SQL 2005 Database.<DeliveryList xmlns="http://schemas.adventure-works.com/DeliverySchedule"><Delivery SalesOrderID="43659"><CustomerName>Steve Schmidt</CustomerName><Address>6126 North Sixth Street, Rockhampton</Address></Delivery><Delivery SalesOrderID="43660"><CustomerName>Tony Lopez</CustomerName><Address>6445 Cashew Street, Rockhampton</Address></Delivery></DeliveryList>I need to query that column using the value method to retreive the addressof the first delivery. I come up with this,SELECTDeliveryList.value('data((/DeliveryList/Delivery/Address)[1])','nvarchar(100)')DeliveryAddressFROM Sales.DeliverySchedulebut it tells meXQuery [Sales.DeliverySchedule.DeliveryList.value()]: There is no elementnamed 'DeliveryList'I have tried every permutation of the path and I can not seem to get it towork? Any ideas?
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This querySELECT DeliveryList.query('declare default element namespacehttp://schemas.adventure-works.com/DeliverySchedule;<DeliveryRoute><RouteNo>{ sql:column("D.DeliveryRoute") }</RouteNo>for a$ in /DeliveryList/Delivery/Addressreturn<Address>a$</Address></DeliveryRoute>')as ResultFROM Sales.DeliverySchedule DReturns this XML<DeliveryRoute xmlns="http://schemas.adventure-works.com/DeliverySchedule"><RouteNo>3</RouteNo>for a$ in /DeliveryList/Delivery/Addressreturn<Address>a$</Address></DeliveryRoute>I need it to return this XML<DeliveryRoute xmlns="http://schemas.adventure-works.com/DeliverySchedule><RouteNo<3>/RouteNo><Address>6126 North Sixth Street, Rockhampton</Address><Address>6445 Cashew Street, Rockhampton</Address></DeiveryRoute>What am I doing wrong? Any ideas? All help is appreciated.TIA, ~CK
UPDATE Sales.DeliveryScheduleSET DeliveryList.modify('declare namespacedf=http://schemas.adventure-works.com/DeliverySchedule;replace value of (df:DeliveryList/df:Delivery/df:Address)[1]' with "7194Fourth St., Rockhampton"')WHERE Sales.DeliverySchedule.ScheduleID = 1This query gives me the following errorXQuery [Sales.DeliverySchedule.DeliveryList.modify()]: Invalid sourcecharacter 0x2019Any ideas? What am I doing wrong here? Thanks for any advice.TIA,~CK
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Hope this makes sense, a tutorial or any suggestions would be great!
