I need binary value in dynamic SQL but I am getting an error
The data types nvarchar and binary are incompatible in the add operator
I need help.
DECLARE #MaxSeqValue binary(10)=NULL
DECLARE #script varchar(max)
-- I have incremental binary values in my table,which I can sort it.
SELECT
#MaxSeqValue = MAX(seqvalue)
FROM [dbr].[DBA_CDClog]-- this my log table
WHERE TableName = #TableName2
set #script = 'Select seq value, tablename
from table X
where SeqValue >'+#MaxSeqValue+'
'
You have to cast #MaxSeqValue to nvarchar.
set #script ='
Select seq value,
tablename
from table X
where SeqValue >' + cast(#MaxSeqValue as nvarchar(max))
This answer is worked for me. CAST option didnt workout.
WHERE SeqValue >0x'+CONVERT(nvarchar(max),#MaxSeqValue,2)+'
Related
I have the following stored procedure that takes one parameter and I need to use that in my IN clause, but that does not work. I get this error when trying.
Conversion failed when converting the varchar value '1,2' to data type int
Here is my stored procedure..
CREATE PROCEDURE [dbo].[p_GetSegment]
#SegmentIds nVarChar(20)
AS
BEGIN
SET NOCOUNT ON;
SELECT dbo.Segment.Name
FROM dbo.tbl_Category
INNER JOIN dbo.Segment ON dbo.tbl_Category.SegmentId
WHERE (dbo.Segment.Id IN (#SegmentIds))
I pass in "1,2". How can I make this work?
In SQL Server 2016+, you can use string_split():
WHERE dbo.Segment.Id IN (SELECT value FROM STRING_SPLIT(#SegmentIds, ','))
You can use any string split function for this purpose. You can also just use `like:
where ',' + #SegmentIds + ',' like '%,' + convert(varchar(255), dbo.Segment.Id) + ',%'
I am working on a dynamic SQL query for a MsSQL stored procedure.
There is a table search.ProfileFields that contains the actual column names in a table I need to query.
My goal is to have the SQL select the specific column in the table, dynamically from its parent query..
A little confusing, heres an example:
DECLARE #sql nvarchar(max)
SELECT #sql = '
SELECT
pfs.SectionID,
pfs.SectionName,
pfs.Link,
(
SELECT
pf.FieldID,
pf.FieldTitle,
pf.FieldSQL,
pf.Restricted,
pf.Optional,
(
SELECT
pf.FieldSQL
FROM
Resources.emp.EmployeeComplete as e
WHERE
e.QID = #QID
) as Value
FROM
search.ProfileFields as pf
WHERE
pf.SectionID = pfs.SectionID
ORDER BY
pf.[Order]
FOR XML PATH (''field''), ELEMENTS, TYPE, ROOT (''fields'')
)
FROM
search.ProfileFieldSections as pfs
WHERE
pfs.Status = 1
FOR XML PATH (''data''), ELEMENTS, TYPE, ROOT (''root'')'
PRINT #sql
EXECUTE sp_executesql #sql, N'#QID varchar(10)', #QID = #QID
In the inner most select. I am querying pf.FieldSQL. I am looking for the actual value that was received by the parent select.
search.ProfileFields has a column called FieldSQL with a few results such as Name, Age, Location.
That is what I am trying to get my inner most select to do.
SELECT Name FROM ... - Name in this case comes from the value of pf.FieldSQL.
How can I go about querying a dynamic column name in this situation?
Have a look at this answer for a couple of suggestions. If your table definition is complex or changes occasionally you probably should use pivot. Here's one that might work for you, so long as column names in the FieldSQL column are well defined, there are not too many of them, and they don't ever change or get added to:
DECLARE #sql nvarchar(max)
SELECT #sql = '
SELECT
pfs.SectionID,
pfs.SectionName,
pfs.Link,
(
SELECT
pf.FieldID,
pf.FieldTitle,
pf.FieldSQL,
pf.Restricted,
pf.Optional,
(
SELECT case pf.FieldSQL
when 'Name' then e.Name
when 'DOB' then convert(nvarchar(10), e.DOB, 126)
-- ... etc.
-- NOTE: may need to aggregated depending on uniqueness of QID:
-- when 'Name' then min(e.Name)
-- when 'DOB' then convert(nvarchar(10), min(e.DOB), 126)
end
FROM
Resources.emp.EmployeeComplete as e
WHERE
e.QID = #QID
) as Value
FROM
search.ProfileFields as pf
WHERE
pf.SectionID = pfs.SectionID
ORDER BY
pf.[Order]
FOR XML PATH (''field''), ELEMENTS, TYPE, ROOT (''fields'')
)
FROM
search.ProfileFieldSections as pfs
WHERE
pfs.Status = 1
FOR XML PATH (''data''), ELEMENTS, TYPE, ROOT (''root'')'
PRINT #sql
EXECUTE sp_executesql #sql, N'#QID varchar(10)', #QID = #QID
Take a look at "PIVOT" operators here PIVOT
Thisshould give you some ideas how to use them.
I am inserting table A to table B. The problematic column looks like -$25.2. I first replaced the $ and tried insert. Got this error
Error converting data type nvarchar to float.
I then checked by
SELECT *
FROM B
WHERE ISNUMERIC([Col Name]) <> 1
and no results were returned.
This is odd. It is supposed to return something.
What should I check next?
I also tried something like
CAST(REPLACE([Col Name], '-$', '') AS FLOAT)
Try using this
DECLARE #Text nvarchar(100)
SET #Text = '-$1234.567'
SET #Text = Replace(#Text,'$', '')
Select CONVERT(float, #Text) AS ColumnValue
Select ABS(CONVERT(float, #Text)) AS ColumnValue
While the 'money' data type isn't great for doing calculations, in this scenario you can use it as an intermediary.
declare #a nvarchar(10)
set #a = '-$25.2'
select
#a,
cast(cast(#a as money) as float)
Only use this though if your data only goes to a max of 4 decimal places, otherwise you will lose precision in the conversion.
I need to write a procedure where I have to sum an unknown column name.
The only information I have access to is the column position.
I am able to get the column name using the following:
SELECT #colName = (SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='TABLENAME' AND ORDINAL_POSITION=#colNum)
I then have the following:
SELECT #sum = (SELECT SUM(#colName) FROM TABLENAME)
I then receive the following error:
Operand data type varchar is invalid for sum operator
I am confused about how to make this work. I have seen many posts on convert and cast, but I cannot cast to an float, numeric, etc because this is a name.
I would appreciate any help.
Thank you
This is not possible. You will have to assemble the SQL query and then execute it. Something like this:
SET #sqlquery = 'SELECT SUM(' + #colName + ') FROM TABLENAME'
EXECUTE ( #sqlquery )
Adjust accordingly.
How do I evaluate a character expression to resolve to a valid column name in a SELECT statement that would return column row values? Eg valid column name = Customer_1 == 'Customer_'+'1'
You need to use dynamic SQL. An example
DECLARE #DynSQL nvarchar(max)
DECLARE #Suffix int = 1
SET #DynSQL = N'SELECT Customer_' + CAST(#Suffix as nvarchar(10)) +
N' FROM YourTable WHERE foo = #foo'
EXEC sp_executesql #DynSQL, N'#foo int', #foo=1
As always with dynamic SQL you need to consider SQL injection if any of the inputs to the process will be user supplied.
How do I evaluate a character expression to resolve to a valid column name in a SELECT statement that would return column row values? Eg valid column name = Customer_1 == 'Customer_'+'1'
You're probably doing something wrong if you need to do this, but if you have to: build the column names as rows and then pivot.