This question already has answers here:
I need to pass column names using variable in select statement in Store Procedure but i cannot use dynamic query
(3 answers)
Where can parameters be used in SQL statements?
(2 answers)
Using SQL parameters to DROP INDEX in C#
(2 answers)
Closed 5 years ago.
How can I pass variable in Group BY expression.Here is my code.
and from #Varientsku I want to pass column name
Create Proc spIsUnique
#varientsku nvarchar(max) output
As
Begin
select #varientsku,
IIf (count(*)>1,'Dublicate','True') as Total from product group by
#varientsku
End.
and I get this error.
Each GROUP BY expression must contain at least one column that is not an outer reference.
Help me to solve this
You need dynamic sql
EXEC ('select '+#varientsku+',
IIf (count(*)>1,''Duplicate'',''True'') as Total
from product
group by '+#varientsku)
Note : Make sure #varientsku is sanitized, this code is vulnerable to sql injection
Related
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Possible to store value of one select column and use it for the next one?
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How to use a calculated column to calculate another column in the same query using a subquery
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SQL Server Reference a Calculated Column
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Using CASE on a Calculated Column in SQL Server 2012
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Closed 6 months ago.
I am trying to calculate the date difference and keep getting a column name error. I am new to SQL and learning from books and YouTube. Any assistance would be appreciated. I commented out the code not working
declare #rpDT datetime
set #rpDT = getdate()
SELECT [OrgKey]
,[visID]
,[visPatID]
,[visInternal]
,[visName]
,[visAssignedNS]
,[visAssignedRoom]
,[visAssignedBed]
,[visAdmitDT]
,isnull([visDischargeDT],#rpDT)as disDT
,datediff(day,[visAdmitDT],disDT) as Pt_days
FROM [MH_Pharmacy_Hub].[MC].[dbo_Visits]
SQL Server and most of the RDBMS do not allow to reference column at the same level. The closest equivalent to achieve similar effect is CROSS APPLY:
declare #rpDT datetime = getdate();
SELECT [OrgKey]
,[visID]
,[visPatID]
,[visInternal]
,[visName]
,[visAssignedNS]
,[visAssignedRoom]
,[visAssignedBed]
,[visAdmitDT]
,s.disDT
,datediff(day,[visAdmitDT],s.disDT) as Pt_days
FROM [MH_Pharmacy_Hub].[MC].[dbo_Visits]
CROSS APPLY (SELECT COALESCE([visDischargeDT],#rpDT)) AS s(disDT);
This question already has answers here:
A SQL Query to select a string between two known strings
(18 answers)
Closed 2 years ago.
I have a string like
https:\/\/www.abc.ca\/v3\/homes\/190135717\/responses\/bulk?page=5&per_page=100
I want everything after the equal sign = and before &, i.e the number 5 in SQL Server
Try this below logic using SUBSTRING and CHARINDEX:
Demo Here
DECLARE #T VARCHAR(200) = 'https:\/\/www.abc.ca\/v3\/homes\/190135717\/responses\/bulk?page=5&per_page=100'
SELECT SUBSTRING(#T,CHARINDEX('=',#T,0)+1,CHARINDEX('&',#T,0)-CHARINDEX('=',#T,0)-1)
This question already has answers here:
sql server 2008 management studio not checking the syntax of my query
(2 answers)
Closed 8 years ago.
As you see from these images, the ROSHEADERID column is invalid and when I execute the first one it returns a meaningful message. But when I use this query in where clause as a subquery. It executes and deletes all of the records without warning or aborting the operation.
How can this be ?
The subquery has access to columns in outer query, thus column ROSHEADERID you ask for is effectively taken from EXM_REVIEWOFSYSTEMS (not from EXM_REVIEWOFSYSTEMSHEADER), thus deleting all records in outer table.
This should clarify a bit on what's going on behind the scenes:
http://sqlfiddle.com/#!2/623c7/3
More information here: http://technet.microsoft.com/en-us/library/ms187638(v=sql.105).aspx
Use Alias Names for tables to avoid conflict:
BEGIN TRAN
DELETE FROM EXM_REVIEWOFSYSTEMS
WHERE ROSHEADERID IN ( SELECT rsh.ROSHEADERID
FROM EXM_REVIEWOFSYSTEMSHEADER rsh
WHERE rsh.PATIENTID = '' )
ROLLBACK TRAN
This question already has answers here:
getting all chars before space in SQL SERVER
(2 answers)
Closed 8 years ago.
I want to extract a certain part of a row. if there is something like this ..." abcd - productA", " zas1234 - productC", how do I extract everything before the dash(-)?
I tried a left(column name,'-') it didnt work. I am on SQL Server 2012.
The column from which I am trying to extract is a varchar column.
It would be great if someone could help me.
Try this,
select SUBSTRING(column_name, 1, CHARINDEX('-', column_name)-1) from table_name;
DECLARE #varStr VARCHAR(MAX)
SET #varStr='abcd - productA'
SELECT CHARINDEX('-',#varStr)
SELECT LEFT(#varStr,CHARINDEX('-',#varStr)-1)
This question already has answers here:
A table name as a variable
(10 answers)
Closed 9 years ago.
I have try to use statement below in my SQL. Is it possible by any means to dynamically select table form database. (For example select table name from Comobox and then display data from selected table)
SET #var1 = 'test';
SELECT * From #var1
Dynamic SQL requires that you create a string consisting of the sql statement, and then you execute the string. Dynamic t-sql quotes in string