I am applying one query where I need to either get results for single department or all department.
PersonID PersonName
1 'Abc'
2 'CDE'
3 'xyz'
DepartmentID DepartmentName
1 'Accounts'
2 'Finance'
HirarchyID personID DepartmentID
1 1 1
2 1 1
3 2 1
Now I want that in my sql query I have a parameter which pass as 1 = 'Accounts', 2='Finance' and 0 = 'Both'
How would I apply this #department parameter in my query ?
I tried applying with case but it will just allow me either accounts or finance.. but not both.
select * from persons p join
Hierarchy h on h.PersonID = p.PersonID JOIN
Department d on d.DepartmentID = h.DepartmentID
where case ???
My sample where clause in my query goes something like this :
WHERE (sa.Area in (case when #myMode = 1 THEN 'abc Mode'
when #myMode = 2 THEN 'XYZ Mode'
ELSE
'abc Mode,xyz Mode'
END))
Invert the condition by supplying the variable as the left hand side of an in():
select * from mytable
where #department in (DepartmentID, 0)
#DepartmentID is parameter that you are passing as "DepartmentID"
If(#DepartmentID=1)
begin
--your code
select * from Department where DepartmentID =1
end
else if(#DepartmentID=2)
begin
--your code
select * from Department where DepartmentID =2
end
else if(#DepartmentID=0)
begin
select * from Department where DepartmentID in(1,2)
end
I hope this will help....
Try this:
-- populate a temp table for demo purposes only
select *
into #departments
from (
select 1 as DepartmentId, 'Accounts' as DepartmentName
union all
select 2 as DepartmentId, 'Finance' as DepartmentName
) as q1
declare #deptName nvarchar(50) = 'Accounts';
declare #deptId int = coalesce((
select DepartmentId
from #departments
where DepartmentName = #deptName
),0);
select *
from #departments -- or dbo.someOtherTable ... which would make more sense
where #deptId in(DepartmentId,0)
go
This will return records for Accounts department only.
Conversely, if you want all departments, change this line of code as follows:
declare #deptName nvarchar(50) = '';
try this
SELECT person_table.*
FROM person_table ,
department_table ,
heirarchy_table
WHERE person_table.person_id = heirarchy_table.person_id
AND department_table.department_id = heirarchy_table.department_id
AND department_table.department_id = CASE WHEN (:PASSEDPARM = '0') THEN department_table.department_id
ELSE :PASSEDPARM
END;
db2 syntax used
Related
I have a table called Student and field name called StudentNumber
Student Table
StudentNumber
-------------
1
2
3
4
5
8
10
Expecting output
6
7
9
I tried like below
Declare #trans int;
set #trans = 1;
while(#trans <=50000)
BEGIN
if((select StudentNumber from [Student] where StudentNumber = #trans) != #trans)
BEGIN
print #trans;
END
END
set #trans = #trans + 1;
You could use (SQL Server 2016 and above):
SELECT Number
FROM (select cast([key] as int) +
(SELECT MIN(StudentNumber) FROM Students) as number
from OPENJSON( '[1'
+ replicate(',1',(SELECT MAX(StudentNumber) FROM Students)-
(SELECT MIN(StudentNumber) FROM Students))+']')) n
LEFT JOIN Students s
ON n.number = s.StudentNumber
WHERE s.StudentNumber IS NULL;
DBFiddle Demo
Note: You could exchange first subquery with any other tally number generator.
More info: SQL, Auxiliary table of numbers
it should be like below
Declare #trans int;
set #trans = 1;
while(#trans <=50000)
BEGIN
if NOT EXISTS (select StudentNumber from [Student] where StudentNumber = #trans)
BEGIN
print #trans;
END
END
set #trans = #trans + 1;
You can do the following
;with report as(
select 1 as missing
union all
select missing + 1
from report
where missing < #max
)
select *
from report m
where not exists ( select 1 from student s where s.id = m.missing)
option (maxrecursion 0);
Here a working demo
Result
missing
6
7
9
Hope that this will help you
I know you try to solve it iterative, just for sports
an idea how to achieve the same using recursive CTE
with missingstudents (StudentNumber)
as (
select StudentNumber-1 from Students s
where not exists (
select StudentNumber from Students s2
where s.StudentNumber-1 = s2.StudentNumber)
UNION ALL
select StudentNumber-1 from missingstudents s
where not exists (
select StudentNumber from Students s2
where s.StudentNumber-1 = s2.StudentNumber)
)
select * from missingstudents
You can try this:
select m.number from
(select min(StudentNumber) a,max(StudentNumber) b from Students) c ,master..spt_values M
where c.a <= m.number
and c.b > = m.number
and type ='P'
and m.number not in (select StudentNumber from Students)
Try like this;
declare #id int
declare #maxStudentNumber int
set #id = 1
select #maxStudentNumber = max(StudentNumber) from Student
create table #MissingIds
(
id int
)
while #id < #maxStudentNumber
begin
insert into #MissingIds values(#id)
set #id = #id + 1
end
select m.id
from #MissingIds m
left join Student s
on m.id = s.StudentNumber
where s.StudentNumber is null
drop table #MissingIds
Example table structure:
EmployeeId TeamleaderId TopTeamleaderId LEVEL ParentTree CompanyId
1 0 0 0 NULL 1
2 1 1 1 2>1 1
3 2 1 2 3>2>1 1
TeamleaderId is foreignKey reference to EmployeeId in the same table
Goal:
Whenever a row is inserted in the table with EmployeeId, TeamleaderId, CompanyId automatically populate TopTeamleaderId, LEVEL and ParentTree with AFTER INSERT trigger
Code:
WITH CTE AS (
SELECT EmployeeId, TeamleaderId,0 AS [Level], CAST(EmployeeId AS varchar(100)) AS Heirarchy, TopTeamleaderId
FROM dbo.Employee
WHERE EmployeeId IN (SELECT EmployeeId FROM Employee WHERE TeamleaderId IS NULL
AND CompanyId IN(SELECT DISTINCT CompanyId FROM INSERTED))
UNION ALL
SELECT mgr.EmployeeId, mgr.TeamleaderId, CTE.[Level] +1 AS [Level],
CAST(( CAST(mgr.EmployeeId AS VARCHAR(100)) + '>' + CTE.Heirarchy) AS varchar(100)) AS Heirarchy, CTE.TopTeamleaderId
FROM CTE
INNER JOIN dbo.Employee AS mgr
ON TaskCTE.EmployeeId = mgr.ParentTeamleaderId
)
UPDATE Employee SET [LEVEL] = TC.[LEVEL], ParentTree = TC.Heirarchy, TopTeamleaderId = TC.TopTeamleaderId
FROM dbo.Employee AS Employee
JOIN (SELECT * FROM CTE WHERE EmployeeId IN(SELECT DISTINCT EmployeeId FROM INSERTED) AND ParentTeamleaderId IS NOT NULL) TC
ON
Employee.EmployeeId = TC.EmployeeId
Problem:
Imagine there are like 1000000 employees in a company, this query would take a long time to execute. How to optimize it so that only the parents of the inserted row are taken in to account?
Recursive CTE's are great, but as you can see the perfomance can suffer with larger hierarchies. It is my firm belief that there is no shame in temp tables.
The following will generate a 200K point hierarchy in 0.784 seconds.
Example
Select EmployeeId
,TeamleaderId
,Lvl=1
,TopTeamleaderId = 0
,ParentTree=cast(EmployeeId as varchar(500))
,CompanyID
Into #TempBld
From Employee
Where TeamleaderId is null
Declare #Cnt int=1
While #Cnt<=30 --<< Set Your Max Level
Begin
Insert Into #TempBld
Select A.EmployeeId
,A.TeamleaderId
,B.Lvl+1
,IIF(B.Lvl=1,B.EmployeeId,B.TopTeamleaderId)
,concat(A.EmployeeId,'>',B.ParentTree)
,A.CompanyID
From Employee A
Join #TempBld B on (B.Lvl=#Cnt and A.TeamleaderId=B.EmployeeId)
Set #Cnt=#Cnt+1
End
--Select * from #TempBld Order by ParentTree
Returns
I have many tables but for instance let's consider 2 tables i.e. Employees and FileEntries. I am picking these fields from both tables EmployeeID,FileStatus,FileName,EmployeeName.
These both tables have 1 common field i.e. EmployeeID. FileEntries can have EmployeeID being present even if it's not in Employees table. So i want to pick all records from both tables but a new field should show 'NotRegistered' if it is not in Employees table.
)
#EmployeeID int
)
Alter PROCEDURE [dbo].[Modify_RejectedFiles] -- '2015-01-06 07:41:00', '2015-01-06 07:41:00',1,3,'','20001018783815'
(
#FromDate SMALLDATETIME,
#ToDate SMALLDATETIME,
#OfficeID INT=0, --it represents id of a company/branch/organization being logged in
#Type INT=0, --it represents type of a user being logged in i.e. 1=orgranization, 2=company, 3=branch
#EmployerUniqueID VARCHAR(15)='',
#EmployeeUniqueID VARCHAR(15)=''
)
AS
BEGIN
DECLARE #Branches TABLE
(
BranchID INT
)
IF #Type = 1 --Organization
BEGIN
INSERT INTO #Branches
SELECT BranchID From vw_OrganizationTree WHERE OrganizationID = #OfficeID --inserts 3 always because we got only 1 organization i.e. 3
END
IF #Type = 2 --Company
BEGIN
INSERT INTO #Branches
SELECT BranchID From vw_OrganizationTree WHERE CompanyID = #OfficeID --inserts 3 always because we got only 1 company i.e. 3
END
IF #Type = 3 -- i.e. Branch
BEGIN
INSERT INTO #Branches
SELECT BranchID From vw_OrganizationTree WHERE BranchID = #OfficeID
END
Declare #IsRegistered varchar(20)= 'Registered'
If ((Select count(*) from RegisteredEmployees where EmployeeUniqueID= #EmployeeUniqueID) <1)
Begin
Set #IsRegistered = 'Not Yet'
End
Select distinct FE.EmployeeUniqueID, RE.EmployeeName, Empr.EmployerName, Br.BranchName,
FE.IsRejected, FE.RejectedFileCreationDateTime
From
File_EDREntries FE
left Join
RegisteredEmployees RE
ON FE.EmployeeUniqueID = RE.EmployeeUniqueID
left Join Employers Empr
ON RE.Employer_ID = Empr.ID
left Join Branches Br
ON Br.BranchID = Empr.Branch_ID
WHERE
FE.IsRejected = 1 --20017128203780
AND Empr.Branch_ID in (Select BranchID from #Branches)
Use Case when RE.EmployeeUniqueID is null then 'Not Yet' else 'Registered' End in your final select Query
Given the following table:
Chain Name
123 Company 1
124 Other Company 1
123 Whatever Company
125 This One
126 That One
125 Another One
127 Last One
I get the following results when I do a Count on the Chain column:
123 2
124 1
125 2
126 1
127 1
Is it possible to group Chain 123 and 124 so they're counted together? Also group 125 and 126? The modified results would look like this:
123/124 3
125/126 3
127 1
My SQL looks like this:
SELECT Table1.Chain, Count(*) as [Count]
FROM Table1 LEFT JOIN Table2 on Table1.Chain = Table2.Chain
WHERE (((Table1.Chain) IN (Table2.Chain)))
GROUP BY Table1.Chain
ORDER BY Table1.Chain;
Thank you!
Depending upon your needs, this might be a bit of a hack, but I would probably add a table to store the Chain and ChainGroup that you are seeking. Something like this:
Chain ChainGroup
123 123/124
124 123/124
125 125/126
126 125/126
127 127/128
Then, in the query, I would join to this table and instead of grouping by Chain I would group by ChainGroup.
I would prefer this over something like a nested IIF statement as those get pretty difficult to debug, and odds are you'll have additional groupings in the future which would be trivial to add to the table and have the new grouping automatically appear in the query.
yes, you can:
SELECT min(Table1.Chain) & '/' & max(Table1.Chain) as chain, Count(*) as [Count]
FROM Table1 LEFT JOIN Table2 on Table1.Chain = Table2.Chain
WHERE (((Table1.Chain) IN (Table2.Chain)))
GROUP BY int((Table1.Chain-1)/2)
ORDER BY min(Table1.Chain);
You can use a nested Iif statement. Hopefully I've got all my parentheses right below! :-)
SELECT Iif(Table1.Chain="123", "123/124",
Iif(Table1.Chain="124", "123/124",
Iif(Table1.Chain="125", "125/126",
Iif(Table1.Chain="126", "125/126", Table1.Chain)))) as [Chain]
, Count(*) as [Count]
FROM Table1 LEFT JOIN Table2 on Table1.Chain = Table2.Chain
WHERE (((Table1.Chain) IN (Table2.Chain)))
GROUP BY Iif(Table1.Chain="123", "123/124",
Iif(Table1.Chain="124", "123/124",
Iif(Table1.Chain="125", "125/126",
Iif(Table1.Chain="126", "125/126", Table1.Chain))))
ORDER BY Table1.Chain;
You could also move the case statement into a subquery in your from clause or a common table expression if you don't want to write it twice in your query.
consider something like:
SELECT
chain_group, COUNT(*) FROM (
SELECT
Table1.Chain,
switch(Table1.Chain IN("123","124"), "123/124",
Table1.Chain IN("125","126"),"125/126",
Table1.Chain) AS chain_group
FROM
Table1 INNER JOIN
Table2 ON
Table1.Chain = Table2.Chain) t
GROUP BY chain_group
ORDER BY chain_group
You can see the below example
----- Make main Table
CREATE TABLE #test
( id int , Name varchar(100))
INSERT #test(id,Name)
values (123,'Company 1'),
(124,'Other Company 1'),
(123, 'Whatever Company'),
(125, 'This One'),
(126 , 'That One'),
(125, 'Another One'),
(127, 'Last One')
CREATE TABLE #temp
(rowID INT IDENTITY(1,1) , ID INT ,cnt INT )
CREATE TABLE #tempResult
(ID VARCHAR(20) ,cnt INT )
INSERT INTO #temp(ID,cnt)
SELECT ID ,COUNT(1) cnt FROM #test GROUP BY ID
DECLARE #rowCnt INT , #TotalCnt INT , #even INT , #odd INT ,
#idNum VARCHAR(20) , #valueCnt INT , #inStart INT = 1
SET #rowCnt = 1
SET #even = 1
SET #odd = 2
SELECT #TotalCnt = COUNT(1) FROM #temp
WHILE #rowCnt <= #TotalCnt
BEGIN
SET #inStart = 1
SET #odd = #rowCnt
SET #even = #rowCnt + 1
SET #idNum = ''
SET #valueCnt = 0
WHILE #inStart <= 2
BEGIN
IF #inStart = 1
Begin
SELECT #idNum = Convert(VARCHAR(5),ID) , #valueCnt = cnt
FROM #temp WHERE rowID = #odd
End
ELSE
BEGIN
SELECT #idNum = #idNum + '/' + Convert(VARCHAR(5),ID) , #valueCnt = #valueCnt + cnt
FROM #temp WHERE rowID = #even
END
SET #inStart = #inStart + 1
END
INSERT INTO #tempResult (ID, Cnt)
VALUES (#idNum,#valueCnt)
SET #rowCnt = #rowCnt + 2
END
SELECT *
FROM #tempResult
I tried searching around, but I couldn't find anything that would help me out.
I'm trying to do this in SQL:
declare #locationType varchar(50);
declare #locationID int;
SELECT column1, column2
FROM viewWhatever
WHERE
CASE #locationType
WHEN 'location' THEN account_location = #locationID
WHEN 'area' THEN xxx_location_area = #locationID
WHEN 'division' THEN xxx_location_division = #locationID
I know that I shouldn't have to put '= #locationID' at the end of each one, but I can't get the syntax even close to being correct. SQL keeps complaining about my '=' on the first WHEN line...
How can I do this?
declare #locationType varchar(50);
declare #locationID int;
SELECT column1, column2
FROM viewWhatever
WHERE
#locationID =
CASE #locationType
WHEN 'location' THEN account_location
WHEN 'area' THEN xxx_location_area
WHEN 'division' THEN xxx_location_division
END
without a case statement...
SELECT column1, column2
FROM viewWhatever
WHERE
(#locationType = 'location' AND account_location = #locationID)
OR
(#locationType = 'area' AND xxx_location_area = #locationID)
OR
(#locationType = 'division' AND xxx_location_division = #locationID)
Here you go.
SELECT
column1,
column2
FROM
viewWhatever
WHERE
CASE
WHEN #locationType = 'location' AND account_location = #locationID THEN 1
WHEN #locationType = 'area' AND xxx_location_area = #locationID THEN 1
WHEN #locationType = 'division' AND xxx_location_division = #locationID THEN 1
ELSE 0
END = 1
I'd say this is an indicator of a flawed table structure. Perhaps the different location types should be separated in different tables, enabling you to do much richer querying and also avoid having superfluous columns around.
If you're unable to change the structure, something like the below might work:
SELECT
*
FROM
Test
WHERE
Account_Location = (
CASE LocationType
WHEN 'location' THEN #locationID
ELSE Account_Location
END
)
AND
Account_Location_Area = (
CASE LocationType
WHEN 'area' THEN #locationID
ELSE Account_Location_Area
END
)
And so forth... We can't change the structure of the query on the fly, but we can override it by making the predicates equal themselves out.
EDIT: The above suggestions are of course much better, just ignore mine.
The problem with this is that when the SQL engine goes to evaluate the expression, it checks the FROM portion to pull the proper tables, and then the WHERE portion to provide some base criteria, so it cannot properly evaluate a dynamic condition on which column to check against.
You can use a WHERE clause when you're checking the WHERE criteria in the predicate, such as
WHERE account_location = CASE #locationType
WHEN 'business' THEN 45
WHEN 'area' THEN 52
END
so in your particular case, you're going to need put the query into a stored procedure or create three separate queries.
OR operator can be alternative of case when in where condition
ALTER PROCEDURE [dbo].[RPT_340bClinicDrugInventorySummary]
-- Add the parameters for the stored procedure here
#ClinicId BIGINT = 0,
#selecttype int,
#selectedValue varchar (50)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
SELECT
drugstock_drugname.n_cur_bal,drugname.cdrugname,clinic.cclinicname
FROM drugstock_drugname
INNER JOIN drugname ON drugstock_drugname.drugnameid_FK = drugname.drugnameid_PK
INNER JOIN drugstock_drugndc ON drugname.drugnameid_PK = drugstock_drugndc.drugnameid_FK
INNER JOIN drugndc ON drugstock_drugndc.drugndcid_FK = drugndc.drugid_PK
LEFT JOIN clinic ON drugstock_drugname.clinicid_FK = clinic.clinicid_PK
WHERE (#ClinicId = 0 AND 1 = 1)
OR (#ClinicId != 0 AND drugstock_drugname.clinicid_FK = #ClinicId)
-- Alternative Case When You can use OR
AND ((#selecttype = 1 AND 1 = 1)
OR (#selecttype = 2 AND drugname.drugnameid_PK = #selectedValue)
OR (#selecttype = 3 AND drugndc.drugid_PK = #selectedValue)
OR (#selecttype = 4 AND drugname.cdrugclass = 'C2')
OR (#selecttype = 5 AND LEFT(drugname.cdrugclass, 1) = 'C'))
ORDER BY clinic.cclinicname, drugname.cdrugname
END
Please try this query.
Answer To above post:
select #msgID, account_id
from viewMailAccountsHeirachy
where
CASE #smartLocationType
WHEN 'store' THEN account_location
WHEN 'area' THEN xxx_location_area
WHEN 'division' THEN xxx_location_division
WHEN 'company' THEN xxx_location_company
END = #smartLocation
Try this:
WHERE (
#smartLocationType IS NULL
OR account_location = (
CASE
WHEN #smartLocationType IS NOT NULL
THEN #smartLocationType
ELSE account_location
END
)
)
CREATE PROCEDURE [dbo].[Temp_Proc_Select_City]
#StateId INT
AS
BEGIN
SELECT * FROM tbl_City
WHERE
#StateID = CASE WHEN ISNULL(#StateId,0) = 0 THEN 0 ELSE StateId END ORDER BY CityName
END
Try this query, it's very easy and useful: Its ready to execute!
USE tempdb
GO
IF NOT OBJECT_ID('Tempdb..Contacts') IS NULL
DROP TABLE Contacts
CREATE TABLE Contacts(ID INT, FirstName VARCHAR(100), LastName VARCHAR(100))
INSERT INTO Contacts (ID, FirstName, LastName)
SELECT 1, 'Omid', 'Karami'
UNION ALL
SELECT 2, 'Alen', 'Fars'
UNION ALL
SELECT 3, 'Sharon', 'b'
UNION ALL
SELECT 4, 'Poja', 'Kar'
UNION ALL
SELECT 5, 'Ryan', 'Lasr'
GO
DECLARE #FirstName VARCHAR(100)
SET #FirstName = 'Omid'
DECLARE #LastName VARCHAR(100)
SET #LastName = ''
SELECT FirstName, LastName
FROM Contacts
WHERE
FirstName = CASE
WHEN LEN(#FirstName) > 0 THEN #FirstName
ELSE FirstName
END
AND
LastName = CASE
WHEN LEN(#LastName) > 0 THEN #LastName
ELSE LastName
END
GO
In general you can manage case of different where conditions in this way
SELECT *
FROM viewWhatever
WHERE 1=(CASE <case column or variable>
WHEN '<value1>' THEN IIF(<where condition 1>,1,0)
WHEN '<value2>' THEN IIF(<where condition 2>,1,0)
ELSE IIF(<else condition>,1,0)
END)
Case Statement in SQL Server Example
Syntax
CASE [ expression ]
WHEN condition_1 THEN result_1
WHEN condition_2 THEN result_2
...
WHEN condition_n THEN result_n
ELSE result
END
Example
SELECT contact_id,
CASE website_id
WHEN 1 THEN 'TechOnTheNet.com'
WHEN 2 THEN 'CheckYourMath.com'
ELSE 'BigActivities.com'
END
FROM contacts;
OR
SELECT contact_id,
CASE
WHEN website_id = 1 THEN 'TechOnTheNet.com'
WHEN website_id = 2 THEN 'CheckYourMath.com'
ELSE 'BigActivities.com'
END
FROM contacts;
This worked for me.
CREATE TABLE PER_CAL ( CAL_YEAR INT, CAL_PER INT )
INSERT INTO PER_CAL( CAL_YEAR, CAL_PER ) VALUES ( 20,1 ), ( 20,2 ), ( 20,3 ), ( 20,4 ), ( 20,5 ), ( 20,6 ), ( 20,7 ), ( 20,8 ), ( 20,9 ), ( 20,10 ), ( 20,11 ), ( 20,12 ),
( 99,1 ), ( 99,2 ), ( 99,3 ), ( 99,4 ), ( 99,5 ), ( 99,6 ), ( 99,7 ), ( 99,8 ), ( 99,9 ), ( 99,10 ), ( 99,11 ), ( 99,12 )
The 4 digit century is determined by the rule, if the year is 50 or more, the century is 1900, otherwise 2000.
Given two 6 digit periods that mark the start and end period, like a quarter, return the rows that fall in that range.
-- 1st quarter of 2020
SELECT * FROM PER_CAL WHERE (( CASE WHEN CAL_YEAR > 50 THEN 1900 ELSE 2000 END + CAL_YEAR ) * 100 + CAL_PER ) BETWEEN 202001 AND 202003
-- 4th quarter of 1999
SELECT * FROM PER_CAL WHERE (( CASE WHEN CAL_YEAR > 50 THEN 1900 ELSE 2000 END + CAL_YEAR ) * 100 + CAL_PER ) BETWEEN 199910 AND 199912
Try this query. Its very easy to understand:
CREATE TABLE PersonsDetail(FirstName nvarchar(20), LastName nvarchar(20), GenderID int);
GO
INSERT INTO PersonsDetail VALUES(N'Gourav', N'Bhatia', 2),
(N'Ramesh', N'Kumar', 1),
(N'Ram', N'Lal', 2),
(N'Sunil', N'Kumar', 3),
(N'Sunny', N'Sehgal', 1),
(N'Malkeet', N'Shaoul', 3),
(N'Jassy', N'Sohal', 2);
GO
SELECT FirstName, LastName, Gender =
CASE GenderID
WHEN 1 THEN 'Male'
WHEN 2 THEN 'Female'
ELSE 'Unknown'
END
FROM PersonsDetail