I'm trying to solve the following problem:
I would like to make a select, when the result is empty it should be replaced with 'empty'
Else the result should be there.
That is my try:
select case (count*)
when 0 then 'empty'
ELSE
THEVALUEOFTHECOLUM
END AS RESULT
from Database.table where CarID = 12;
Thanks for every comment.
This should work, but you might have to convert the second occurrence of COUNT(*) to VARCHAR depending on the database used:
SELECT
CASE WHEN COUNT(*) = 0
THEN 'empty'
ELSE COUNT(*) -- CONVERT, TO_CHAR, ...
END AS result
FROM Database.table where CarID = 12;
SELECT
CASE
WHEN Q.countvalue = 0 THEN 'Empty'
ELSE CONVERT(NVARCHAR(10), Q.countvalue)
END AS RESULT
FROM
(
SELECT COUNT(*) AS countvalue
FROM Database.table WHERE CarID = 12
) AS Q
This feels hacky to me, but it will return the column data.
It is not one query, but it's still setwise.
declare #tmp table (id int)
declare #cnt int
insert into #tmp select col from table
select #cnt = count(*) from #tmp
if(#cnt = 0)
begin
select 'empty'
end
else
begin
select * from #tmp
end
Is it possible to code it with one query?
If there are no results -> no result found
else
Show all results, not only one
declare #tmp table (id int)
declare #cnt int
insert into #tmp select col from table
select #cnt = count(*) from #tmp
if(#cnt = 0)
begin
select 'empty'
end
else
begin
select * from #tmp
end
Related
declare #varID as INT = 2
insert into table1
(
ID
,varName
)
select
ID
,**#####**
from table2
I want value of varName based on #varID. How can I do that?
What should be in place of #####?
Statement that replicate IF #varname = 2 then 'P' else 'I'.
You are very close. Just mention the variable in the SELECT clause. Like this.
declare #varID as INT = 2
insert into table1 (ID ,varName)
select ID,
CASE WHEN #varID = 2 THEN 'P' ELSE 'I' END
from table2
Maybe a CASE WHEN THEN ELSE END statement like below
declare #varID as INT = 2
insert into table1
(
ID
,varName
)
select
ID
,CASE WHEN #varID=2 THEN 'P' ELSE 'I' END
from table2
i Have the following table like-
column_no count_no
------------------------
1 2
2 2
3 2
if find all count_no value is same i want to return a custom message using strored procedure.
You can try this:
SET NOCOUNT ON
declare #msg varchar(500) = 'your custom message'
Create table #temp
(
column_no int ,
count_no int
)
insert into #temp
values
(1,2),
(2,2),
(3,2)
IF (select count(*)
from
(select distinct count_no from #temp ) as diff) <> 1
BEGIN
select 1 where 1<>1 --select nothing
END
ELSE
BEGIN
print #msg
END
drop table #temp
I'm not sure what you want to return if there are any differences, but something like this returns a result set with 0 or one rows:
select 'All same'
from t
having min(count_no) = max(count_no);
If you want to print the result:
if (not exists (select 1 from t having min(count_no) <> max(count_no)))
begin
print 'All same'
end;
At the very end of the Stored procedure a SELECT statement is made to display the contents of the Table including function that will simultaneously populate fields in the table.
Here is the Select Statement:
IF #type = 'SH'
SELECT DISTINCT *
FROM #History
ORDER BY 1, 2, 3, 4, 5
ELSE
SELECT DISTINCT AmhazName
,Activity
,ServiceName
,Sarid
,PerformedDate
,UserRole
,Details
,dbo.ufn_SarHistoryActionText(sarid, status, performeddate) AS [ActionText]
,FullName
,CategoryDescription
,StatusDescription
,ActionPerformed
,Case
when Details like '%ProjManagerId%'
Then dbo.ufn_GetUserForHistoryReport (PerformedDate, SarId, '%ProjManagerId%')
Else
--when Details like '%UserId%'
dbo.ufn_GetUserForHistoryReport (PerformedDate, SarId, '%UserId%')
--(select 'no user') as [AssignedUser]
End as [AssignedUser]
--,dbo.ufn_GetPMForHistoryReport(PerformedDate, SarId) as [AssignedUser]
FROM #history
ORDER BY 1, 2, 3, 4, 5
DROP TABLE #Historyw
Here is the function I believe is causing problems:
ALTER FUNCTION [dbo].[ufn_SarHistoryActionText]
(
-- Add the parameters for the function here
#sarID int
, #status varchar(6)
, #statusDate datetime
)
RETURNS varchar(100)
AS
BEGIN
-- Declare the return variable here
DECLARE #Result varchar(100)
set #Result = (
SELECT C.ActionText
from LuStatusChange as C
WHERE C.FromStatus = dbo.ufn_SarHistoryPriorStatus(#sarID,#status,#statusDate)
AND C.ToStatus = #status
)
-- Return the result of the function
RETURN #Result
END
GO
As I debug and walk through loads of values, I haven't come across anything that resulted in multiple values. maybe I'm missing something.
Add TOP 1 in the select inside the function:
SELECT TOP 1 C.ActionText
Can you replace
set #Result = (
SELECT C.ActionText
from LuStatusChange as C
WHERE C.FromStatus = dbo.ufn_SarHistoryPriorStatus(#sarID,#status,#statusDate)
AND C.ToStatus = #status
)
as below:
#Result ***IN*** (
SELECT C.ActionText
from LuStatusChange as C
WHERE C.FromStatus = dbo.ufn_SarHistoryPriorStatus(#sarID,#status,#statusDate)
AND C.ToStatus = #status
)
If functionally your query should not written more than 1 row, something is wrong with your query.
I have this query (something like a case statement which I can use and fix it)
select *
from mytable
where 1=1
and (isNull(ID, 0) = 0 OR UtilityID IN (9,40))
I also want to add another statement
select *
from mytable
where 1=1
and UtilityID NOT IN (9,40)
Everything is happening in a procedure, so want to use a variable like declare #something so if that is passed as 1, use the first statement and the if 0 is passed, use the latter one.
While I appreciate the genius in Dale's answer I find this more readable:
IF #something = 0
BEGIN
select *
from mytable
where ID IS NULL OR ID = 0 OR UtilityID IN (9,40);
END
IF #something = 1
BEGIN
select *
from mytable
where UtilityID NOT IN (9,40);
END
It's procedure code, so use IF to direct the control flow. Also expanded and simplified your where clauses
I think I understand your logic, ignoring the 1=1 (which does nothing) you want to only allow id = 0 when #something = 1. This should do it:
declare #something bit = 0;
declare #mytable table (ID int, UtilityID int);
insert into #mytable (ID, UtilityID)
select 0, 1 union all
select 1, 2 union all
select 2, 9 union all
select 3, 40;
select *
from #mytable
where (
(#something = 1 and (isnull(ID, 0) = 0 or UtilityID in (9,40)))
or (#something = 0 and (UtilityID not in (9,40)))
);
A more performant approach for a larger query could be:
select *
from #mytable
where (#something = 1 and (isnull(ID, 0) = 0 or UtilityID in (9,40)))
union all
select *
from #mytable
where (#something = 0 and (UtilityID not in (9,40)));
PS: Hopefully your ID cannot ever by null - it should have a constraint on it.
i have this procedure and i want insert list of value into table,and i want check duplicate value and return this but i get this error
ERROR:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
ALTER PROCEDURE [dbo].[insertData]
#Value insertTbl READONLY,
#Result INT OUTPUT
AS
BEGIN
BEGIN TRY
IF (SELECT COUNT(Id)
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])) = 0
BEGIN
INSERT INTO dbo.username ( Id, NAME )
SELECT Id,
NAME
FROM #Values
WHERE Id NOT IN (SELECT Id
FROM [dbo].[username])
SELECT #Result = 101
END
ELSE
SELECT #Result = (
SELECT Id
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])
)
END TRY
BEGIN CATCH
SELECT ERROR_MESSAGE()
END CATCH
END
Please try this.
I have changed the return type to VARCHAR. That would return a CSV (e.g. 1,3,9...)
The other option is to return a result set. For this replace SELECT #Result = to INSERT INTO #Result...
Hope this helps.
ALTER PROCEDURE [dbo].[insertData]
#Value insertTbl READONLY,
#Result VARCHAR(500) OUTPUT
AS
BEGIN
BEGIN TRY
IF (SELECT COUNT(Id)
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])
) = 0
BEGIN
INSERT INTO dbo.username (Id,NAME)
SELECT Id,
NAME
FROM #Values
WHERE Id NOT IN (SELECT Id
FROM [dbo].[username])
SELECT #Result = 101
END
ELSE
BEGIN
SELECT #Result = (SELECT STUFF((SELECT ', ' + CAST(ID AS VARCHAR(5))
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])
ORDER BY Id FOR XML PATH('')),1,2,''))
END
END TRY
BEGIN CATCH
SELECT ERROR_MESSAGE()
END CATCH
END
Probably this line
SELECT #Result=(SELECT Id FROM #Values WHERE Id IN (SELECT Id FROM [dbo].[username]))
return more than one row. You should change the query to return only one value as below
SELECT #Result=(SELECT top 1 Id FROM #Values WHERE Id IN (SELECT Id FROM [dbo].[username]))
or you should change your logic. Alternative way is to use temprary table to return listo of ID. Try below solution
-- create temporary table before (!) creating procedure
create table #Resulttab
(
Result int
)
go
ALTER PROCEDURE [dbo].[insertData]
#Value insertTbl READONLY,
#Result INT OUTPUT -- in this solution I think you don't need this parameter
AS
BEGIN
BEGIN TRY
IF (SELECT COUNT(Id)
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])) = 0
BEGIN
INSERT INTO dbo.username ( Id, NAME )
SELECT Id,
NAME
FROM #Values
WHERE Id NOT IN (SELECT Id
FROM [dbo].[username])
SELECT #Result = 101
END
ELSE
insert into #Resulttab
SELECT Id
FROM #Values
WHERE Id IN (SELECT Id
FROM [dbo].[username])
END TRY
BEGIN CATCH
SELECT ERROR_MESSAGE()
END CATCH
END
go
You can use it that way:
-- create temporary table before run procedure
create table #Resulttab
(
Result int
)
-- run procedure with parameters
exec insertData ...
--after run procedure you can check list of your IDs
select Result from #Resulttab