I want to do an update statement according to a result of a subquery
For example :
Update TABLE1
set A= (Select Count(*) from TABLE2 )
if the value of count is 0 then Update the value of A to be 0 Else set A = 1;
So could you please advice me how can I do it?
I tried the following but I got a syntax error :
SELECT count(*) as TC
CASE
WHEN TC > 0
THEN '1'
ELSE '0'
END AS dum
FROM Event E where E.Type= 'CANCELLING';
CASE is perfectly suitable:
UPDATE TABLE1
SET A =
CASE
WHEN (SELECT count(*) FROM TABLE2) > 0 THEN 1
ELSE 0
END
declare #count int
set #count=Select Count(*) from TABLE2
if #count=0
BEGIN
Update TABLE1
set A=0
end
else
Update TABLE1
set A=1
Related
how to SET return value to new query ?
query like :
DECLARE #count;
SELECT COUNT(*) FROM a WHERE x = 1;
SET #count = //result_last_query
SELECT * FROM b WHERE z = #count;
As simple as :
SELECT * FROM b
where z=(select count(*) FROM a FROM a WHERE x = 1;)}
You dont even require any variable declaration
thanks good solution
I modified the code of answers
SELECT *
FROM B
WHERE id IN (
SELECT COUNT(*) AS count
FROM A
WHERE x = 1
)
If you want get the resultset of the select query and want to access the row count in next statement you could use ##rowcount
Example Usage:
Select top 10 * from SomeTable
SELECT ##rowcount
First query in above script will return 10 rows and the second query will return 10.
You are almost done. You can set in query as the below:
DECLARE #count INT
SELECT #count = COUNT(*) FROM a WHERE x = 1
SELECT * FROM b WHERE z = #count
All you need to do is to put the variable in the query itself, in order to set the variable's value with the row count.
Then you can use the variable's value in the next query.
DECLARE #count;
SELECT #count = COUNT(*) FROM a WHERE x = 1;
SELECT * FROM b WHERE z = #count;
But, be careful that the variable will only be visible during execution so you need to execute this entire script all at once in order for the #count variable to work for the last query.
I have parameters like these
declare #Phl1_descr varchar(50)
SET #Phl1_descr = 'Greece'
declare #Phl2_descr varchar(50)
SET #Phl2_descr = 'Coffee & Beverages'
I want to join two tables with the above parameters (if they are not null), so I tried to do something like below in the "ON" keyword of my JOIN
ON
(CASE WHEN LEN(#Phl1_descr) > 0 THEN A.Phl1_descr ELSE B.Phl1_descr END) = B.Phl1_descr AND
(CASE WHEN LEN(#Phl2_descr) > 0 THEN A.Phl2_descr ELSE B.Phl2_descr END) = B.Phl2_descr
However if I send one of the parameters like as '', it doesn't work. Any simpler idea?
Is it posible to use simpler solution? Like:
IF #Phl1_descr IS NOT NULL AND #Phl2_descr IS NOT NULL
BEGIN
SELECT *
FROM Table1 as A
LEFT JOIN Table2 as B on A.Phl1_descr=B.Phl1_descr and A.Phl2_descr=B.Phl2_descr
END
ELSE IF #Phl1_descr IS NOT NULL AND #Phl2_descr IS NULL
BEGIN
SELECT *
FROM Table1 as A
LEFT JOIN Table2 as B on A.Phl1_descr=B.Phl1_descr
END
ELSE IF #Phl1_descr IS NULL AND #Phl2_descr IS NOT NULL
BEGIN
SELECT *
FROM Table1 as A
LEFT JOIN Table2 as B on A.Phl2_descr=B.Phl2_descr
END
So you will get a simpler execution plans and simpler logic.
You can also use ... CASE WHEN #Phl1_descr IS NULL THEN ... to check NULL values
Interesting but
B.Phl1_descr = B.Phl1_descr
not working but
ISNULL(B.Phl1_descr,'-1') = ISNULL(B.Phl1_descr,'-1')
works,
So just a simple change in the below code work it out
(CASE WHEN LEN(#Phl1_descr) > 1 THEN A.Phl1_descr ELSE ISNULL(B.Phl1_descr,'-1') END) = ISNULL(B.Phl1_descr,'-1') AND
(CASE WHEN LEN(#Phl2_descr) > 1 THEN A.Phl2_descr ELSE ISNULL(B.Phl2_descr,'-1') END) = ISNULL(B.Phl2_descr,'-1') AND
I am using this query to update a column with ascending values:
DECLARE #counter NUMERIC(10, 0)
SET #counter = 1400000
UPDATE SomeTable
SET #counter = SomeColumn = #counter + 1
Question is, how can I not put duplicates there? For example the column already has 1400002 as value. Normally it has NULLs, but sometimes it doesnt. I could add
where SomeColumn is null
but this would not avoid duplicates. Any ideas?
Thanks
I am not sure that this will help or not but you can put your existing data into temp table and then use that temp table to remove duplicates like:
WHERE (#counter + 1) not in ( select SomeColumn from #temp)
If above is not correct then please explain your question a little more.
This worked for me in SQL Server 2008:
DECLARE #StartNumber int, #EndNumber int;
SET #StartNumber = 100;
SELECT #EndNumber = #StartNumber + COUNT(*) - 1 FROM SomeTable;
WITH numbers AS (
SELECT #StartNumber AS Value
UNION ALL
SELECT
Value + 1
FROM numbers
WHERE Value < #EndNumber
),
validnumbers AS (
SELECT
n.Value,
rownum = ROW_NUMBER() OVER (ORDER BY n.Value)
FROM numbers n
LEFT JOIN SomeTable t ON n.Value = t.Value
WHERE t.Value IS NULL
),
RowsToUpdate AS (
SELECT
Value,
rownum = ROW_NUMBER() OVER (ORDER BY Value)
FROM SomeTable
WHERE Value IS NULL
OR Value NOT IN (SELECT Value FROM numbers)
)
UPDATE r
SET Value = v.Value
FROM RowsToUpdate r
INNER JOIN validnumbers v ON v.rownum = r.rownum;
Basically, it implements the following steps:
Create a number table.
Exclude the numbers present in SomeTable.
Rank the rest of the rows.
Exclude the values from SomeTable that are present in the number table.
Rank the rest of the rows.
Update the ranked rows of SomeTable from the ranked number list.
Not sure how good this solution would be for big tables, though...
I am trying to establish upper / lower bound in my stored procedure
below and am having some problems at the end (I am getting no results
where, without the temp table inner join i get the expected results).
I need some help where I am trying to join the columns in my temp table #PageIndexForUsers
to the rest of my join statement and I am mucking something up with
this statement:
INNER JOIN
#PageIndexForUsers ON ( dbo.aspnet_Users.UserId =
#PageIndexForUsers.UserId AND #PageIndexForUsers.IndexId >= #PageLowerBound AND
#PageIndexForUsers.IndexId <= #PageUpperBound )
I could use feedback at this point - and, any advice on how to improve
my procedure's logic (if you see anything else that needs improvement) is also appreciated.
Thanks in advance...
ALTER PROCEDURE dbo.wb_Membership_GetAllUsers
#ApplicationName nvarchar(256),
#sortOrderId smallint = 0,
#PageIndex int,
#PageSize int
AS
BEGIN
DECLARE #ApplicationId uniqueidentifier
SELECT #ApplicationId = NULL
SELECT #ApplicationId = ApplicationId FROM dbo.aspnet_Applications WHERE LOWER(#ApplicationName) = LoweredApplicationName
IF (#ApplicationId IS NULL)
RETURN 0
-- Set the page bounds
DECLARE #PageLowerBound int
DECLARE #PageUpperBound int
DECLARE #TotalRecords int
SET #PageLowerBound = #PageSize * #PageIndex
SET #PageUpperBound = #PageSize - 1 + #PageLowerBound
BEGIN TRY
-- Create a temp table TO store the select results
CREATE TABLE #PageIndexForUsers
(
IndexId int IDENTITY (0, 1) NOT NULL,
UserId uniqueidentifier
)
-- Insert into our temp table
INSERT INTO #PageIndexForUsers (UserId)
SELECT u.UserId
FROM dbo.aspnet_Membership m, dbo.aspnet_Users u
WHERE u.ApplicationId = #ApplicationId AND u.UserId = m.UserId
ORDER BY u.UserName
SELECT #TotalRecords = ##ROWCOUNT
SELECT dbo.wb_Profiles.profileid, dbo.wb_ProfileData.firstname, dbo.wb_ProfileData.lastname, dbo.wb_Email.emailaddress, dbo.wb_Email.isconfirmed, dbo.wb_Email.emaildomain, dbo.wb_Address.streetname, dbo.wb_Address.cityorprovince, dbo.wb_Address.state, dbo.wb_Address.postalorzip, dbo.wb_Address.country, dbo.wb_ProfileAddress.addresstype,dbo.wb_ProfileData.birthday, dbo.wb_ProfileData.gender, dbo.wb_Session.sessionid, dbo.wb_Session.lastactivitydate, dbo.aspnet_Membership.userid, dbo.aspnet_Membership.password, dbo.aspnet_Membership.passwordquestion, dbo.aspnet_Membership.passwordanswer, dbo.aspnet_Membership.createdate
FROM dbo.wb_Profiles
INNER JOIN dbo.wb_ProfileAddress
ON
(
dbo.wb_Profiles.profileid = dbo.wb_ProfileAddress.profileid
AND dbo.wb_ProfileAddress.addresstype = 'home'
)
INNER JOIN dbo.wb_Address
ON dbo.wb_ProfileAddress.addressid = dbo.wb_Address.addressid
INNER JOIN dbo.wb_ProfileData
ON dbo.wb_Profiles.profileid = dbo.wb_ProfileData.profileid
INNER JOIN dbo.wb_Email
ON
(
dbo.wb_Profiles.profileid = dbo.wb_Email.profileid
AND dbo.wb_Email.isprimary = 1
)
INNER JOIN dbo.wb_Session
ON dbo.wb_Profiles.profileid = dbo.wb_Session.profileid
INNER JOIN
dbo.aspnet_Membership
ON dbo.wb_Profiles.userid = dbo.aspnet_Membership.userid
INNER JOIN
dbo.aspnet_Users
ON dbo.aspnet_Membership.UserId = dbo.aspnet_Users.UserId
INNER JOIN
dbo.aspnet_Applications
ON dbo.aspnet_Users.ApplicationId = dbo.aspnet_Applications.ApplicationId
INNER JOIN
#PageIndexForUsers ON ( dbo.aspnet_Users.UserId =
#PageIndexForUsers.UserId AND #PageIndexForUsers.IndexId >= #PageLowerBound AND
#PageIndexForUsers.IndexId <= #PageUpperBound )
ORDER BY CASE #sortOrderId
WHEN 1 THEN dbo.wb_ProfileData.lastname
WHEN 2 THEN dbo.wb_Profiles.username
WHEN 3 THEN dbo.wb_Address.postalorzip
WHEN 4 THEN dbo.wb_Address.state
END
END TRY
BEGIN CATCH
IF ##TRANCOUNT > 0 ROLLBACK TRAN
EXEC wb_ErrorHandler
RETURN 55555
END CATCH
RETURN #TotalRecords
END
GO
You don't have enough rows in #PageIndexForUsers, no?
If #PageSize = 50 and you want #PageIndex 2, then you are looking for rows 100 to 149 from #PageIndexForUsers. Do you have this many rows?
The row filter should be applied over the larger dataset that starts FROM dbo.wb_Profiles
A UI (before the report shows) shows a look up (Combo) that has
(ID = 0).All Organization Units
(ID =4).HR
(ID = 5).DEV
I need to:
Be able to show data of (4) + (5) if
(0) is selected.
Only (4) OR (5) if either HR or DEV is selected.
Lookup combo code (Selected Feeds the parameter in the below query.)
Select 0 AS ID,'All Org' AS Name from DP_ORG_OrganizationUnit
where DP_ORG_OrganizationUnit.Code IN {AccessData}
Union
SELECT
DP_ORG_OrganizationUnit.ID,
DP_ORG_OrganizationUnit.Name
FROM DP_ORG_OrganizationUnit where DP_ORG_OrganizationUnit.Code IN ('HR','DEV')
Report data row query
SET CONCAT_NULL_YIELDS_NULL OFF
DECLARE #EmpID as int;
DECLARE #OrganizationUnit as int;
DECLARE #StartDate as datetime;
DECLARE #EndDate as datetime;
SET #EmpID = ?;
SET #StartDate = ?;
SET #EndDate = ?;
SET #OrganizationUnit = ?;
SELECT
Employee.Code,
Employee.Name1+' '+Employee.Name2+' '+Employee.Name3+' '+Employee.Name4+' '+Employee.Name5 AS FullName,
Employee.OrganizationUnit,
ContractType.Name,
EmployeeContract.StartDate,
EmployeeContract.EndDate
FROM Employee INNER JOIN (ContractType INNER JOIN EmployeeContract
ON ContractType.ID = EmployeeContract.ContractType)
ON Employee.ID = EmployeeContract.Employee
WHERE (Employee.ID = #EmpID OR #EmpID=0)
AND
(Employee.OrganizationUnit = #OrganizationUnit OR #OrganizationUnit=0)
AND NOT((EndDate < #StartDate or StartDate > #EndDate));
Any way I can achieve it from the looks of it? 0=0 would show all the data from other
departments too..
Anybody :-o?
First off, your lookup combo code could be tightened up a bit:
-- the FROM clause was superfluous
SELECT 0 AS ID,'All Org' AS Name
UNION ALL
-- the two-part identifiers were superfluous (only one table)
SELECT ID, Name
FROM DP_ORG_OrganizationUnit
WHERE Code IN ('HR','DEV')
For the report query, the simplest form would be:
WHERE
((#OrganizationUnit > 0 AND Employee.OrganizationUnit = #OrganizationUnit) OR
(#OrganizationUnit = 0 AND Employee.OrganizationUnit IN (4,5)))
something like this should work
Where (Employee.OrganizationUnit = case when #OrganizationUnit=0 then 4 else #OrganizationUnit end OR case when #OrganizationUnit=0 then 5 else #OrganizationUnit end)
Try this, which should use indexes on your query...
DECALRE #FilterValues (FilterValue int not null primary key)
IF #Param=0
BEGIN
INSERT INTO #FilterValues VALUES (4)
INSERT INTO #FilterValues VALUES (5)
END
ELSE ID #PAram IS NOT NULL
BEGIN
INSERT INTO #FilterValues VALUES (#Param)
END
SELECT
....
FROM YourTable y
INNER JOIN #FilterValues f ON y.Value=f.Value
WHERE .....
KM's version will work, but this query does not need a temp table...
SELECT *
FROM Employee
WHERE (
#OrganizationUnit = 0
OR
(
#OrganizationUnit <> 0
AND
Employee.OrganizationUnit = #OrganizationUnit
)
)
How about
WHERE (Employee.ID = #EmpID OR #EmpID=0)
AND
(Employee.OrganizationUnit BETWEEN ISNULL(NULLIF(#OrganizationUnit,0),0) AND ISNULL(NULLIF(#OrganizationUnit,0),99))
AND NOT((EndDate < #StartDate or StartDate > #EndDate));