Conditional Where Clause W/ Case Statement Possible?
Sep 25, 2007
Greetings,
After many hours search many forums and many failed experiments, I figure it's time to turn to the experts.
I need to execute a query that changes the returned data based upon a parameter's value. In my example below, the lob field contains both text values and nulls.
SELECT uniqueID, lob, xdate
FROM mytable
WHERE
CASE WHEN @myparam = 'ALL'
THEN
xdate >= '2007-09-01'
ELSE
xdate >= '2007-09-01' or
lob = @myparm
END
I've experimented with various forms of the LIKE function, checking for null/not null and keep coming up blank.
I thought about using an IF statement and creating different versions of the entire statement, however, in real-life I need to do this with four fields using four parameters (one for each field). The permutations are a little too much.
Any ideas?
Rob
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Mar 26, 2012
I'm trying to use a conditional statement in the where clause.
Here is my table
UID Amount ID PID Amount2
1 30000 8064 NULL NULL
2 30000 8042 8064 30000
What I'm trying to achieve:
If Amount = Amount2 for UID 2 then show UID 1
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Jul 20, 2005
Hi,I'm trying to do calculations in a SQL statement, but depending on onevariable (a.type in example) I'll need to pull another variable fromseperate tables.Here is my code thus far:select a.DeptCode DeptCode,a.Type Type,(a.ExpenseUnit / (select volume from TargetData b where b.type =a.type)) ExpenseFromcalc1 aThe problem... a.Type can be FYTD, Budget, or Target... and dependingon which one it is, I need to make b either FYTDData, TargetData, orBudgetData. I'm thinking a case statement might do the trick, but Ican't find any syntax on how to use Case in an MS SQL statement. EvenIf statements will work (if that's possible), though case would beless messy.Any suggestions would be much appriciative. Thanks...Alex.
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Jan 22, 2007
I need a SQL statement that selects a specific year (@yr type int) in the "createddate" column...if this @yr is equal to 0 then I want to select ALL columns regardless of the year...This is what I have so far, but it doesnt work...SELECT * FROM tblUsersWHERE year(CreatedDate)=CASEWHEN @yr<>'0' THEN @yrELSE NOT NULLEND
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Oct 3, 2007
Hi!I want to make search engine and I have problem with query for this search. User can write username to search or text to search or both. So at first I made query for each event individually: ALTER PROCEDURE [dbo].[Show_Search_Topics]
@username varchar(200),
@search_text varchar(200),
@days int
AS
DECLARE @date DATETIME
SET @date = DATEADD(day,@days,GETDATE())
IF @username IS NOT NULL AND @search_text IS NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (dbo.aspnet_Users.UserName = @username) AND (forum_topics_1.post_current_date >= @date)
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
ELSE
IF @username IS NULL AND @search_text IS NOT NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (forum_topics_1.post_current_date >= @date) AND (forum_topics_1.post_title LIKE '%' + @search_text + '%')
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
ELSE
IF @username IS NOT NULL AND @search_text IS NOT NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (forum_topics_1.post_current_date >= @date) AND (forum_topics_1.post_title LIKE '%' + @search_text + '%') AND
(dbo.aspnet_Users.UserName = @username)
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
RETURN This 3 queries are different only by Having clause. So I want to put If/Case in Having clause, but I have problem. Can anyone help me?Also I want to make paging from SQL level, so if anyone will be so helpful and make working this query with this: ALTER PROCEDURE [dbo].[Show_Search_Topics]
@username varchar(200),
@search_text varchar(200),
@days int,
@page int,
@page_size int
AS
WITH Results As
(
//QUERY)
)
SELECT * FROM Results
WHERE RowNumber BETWEEN (@page_size * @page + 1) AND (@page_size * (@page + 1))
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
RETURN I will be grateful :-)
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Feb 21, 2008
Hi,
I need help to use CASE Statement within my WHERE Clause. I want to change the WHERE Clause based on my condition as following:
SELECT ...
FROM ...
WHERE (condition)
AND (condition)
AND (condition)
AND (
CASE Table.Category
WHEN 'Drinks' THEN
Table1.Field1 = 1 -- Problem line
ELSE
Table1.Field1 = 1 AND Table1.Field2 = 1 -- Problem line
END
)
In the above case, my WHERE Clause is dependent on one of the fields in a table. If it has a certain value then only Table1.Field1 is used otherwise Table1.Field1 & Field2 come into action.
I am getting error on the mentioned line (Problem Line). Since CASE is an expression and does not execute a statement, can anyone help me to get my WHERE Clause working...
Thanks in advance...
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Aug 13, 2003
can i use case statement in where clause.
The scenario is as follow
declare @param int
select
*
from
table1
where
column1 = 'asdf'
column2= @param
In the above sql, if @param is '' then i don't want to include it in the where clause.I can use "like" statement for that, but i want exact value not partial value.
can i use case in where clause so that if @param is '' then i will not include in the where clause
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Apr 7, 2006
Can I do the following? Keep getting an error stopping at the first < of the where clause.
declare @mon as int, @yr as int, @myDate as varChar(20)
set @yr=2006
set @mon=1
set @mydate='01/31/2006 23:59:59'
select 0 as DTAP, 0 as DT, 0 as TD, 0 as HIB, 0 as IPV, 0 as MMR, 0 as HEPB, 0 as _VAR, count(v.procedureKey) as FLU, 0 as PPV23, 0 as PCV7, v.chartID, max(rs1.dateService) as dateService from dbo.tbl1 v,
(select distinct dateService, chartID, procedureKey from fhc.dbo.tbl1 where (datePart(year,dateService)=@yr and datePart(month,dateService)=@mon) and (procedureKey='90657' or procedureKey='90658')) as rs1
where (v.chartID=rs1.chartID) and (v.procedureKey=rs1.procedureKey) and
(case when @mon=1 then dateDiff(month,dateService,@myDate)< 216
when @mon=2 then dateDiff(month,dateService,@myDate)<244
when @mon=3 then dateDiff(month,dateService,@myDate)<275
when @mon=4 then dateDiff(month,dateService,@myDate)<305
when @mon=5 then dateDiff(month,dateService,@myDate)<336
when @mon=6 then dateDiff(month,dateService,@myDate)<366
when @mon=7 then dateDiff(month,dateService,@myDate)<32
when @mon=8 then dateDiff(month,dateService,@myDate)<63
when @mon=9 then dateDiff(month,dateService,@myDate)<93
when @mon=10 then dateDiff(month,dateService,@myDate)<124
when @mon=11 then dateDiff(month,dateService,@myDate)<154
when @mon=12 then dateDiff(month,dateService,@myDate)<185
end) group by v.chartID, rs1.procedureKey
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Aug 10, 2004
Hello
I want to put a case statement into a where clause but it's not working. Can anybody help, or tell me a better way of doing this
Thanks very much
declare @param varchar (100)
select @param = 'mytext
select
colA
,colB
,colC
from
mytable
where
(case
when @param is null then colA = 'group'
else colA = 'single'
end)
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Mar 15, 2007
i have wrote a query which compares two tables, returning anywhere the qty is not the same in each table:
(simple ex)
Select order_no
from table1
inner join table2
on table1.order_no = table2.order_no
group by order_no
having table1.Qty<> table2.Qty
BUT... I need to add a table3, where there maybe (or may not be enters - thus a left join). If there is an entry in table3 then use qty in table3 and not table1... so having becomes:
CASE WHEN table1.Qty<> table3.Qty
THEN table3.Qty<> table2.Qty
ELSE table1.Qty<> table2.Qty END
but how do i actually write this?
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Apr 17, 2008
I need to have a CASE statement inside a WHERE clause. Is this possible? Here is my WEHRE clause. Any suggestions are appreciated:
WHERE
--r.pBOM_ID=d.fEngr_BOM_ID and
r.fItem_ID=a.pEngr_Item_ID and
r.level<=@v_level+1 and
case when @v_showrootlevel=1 then r.level>1 else r.level>1 end
order by r.pID
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May 8, 2008
I am trying to create a condition if the value of a parameter is null then pass a certain WHERE condition to my query. I keep on getting this error:
Line 15: Incorrect syntax near '='.
this is my query that lies on a PROC:
SELECT count(a.pEngr_Item_ID) as assembly_count FROM Engr_Item a
INNER JOIN Engr_BOM_Control b
ON a.pEngr_Item_ID=b.fEngr_Item_ID
WHERE
b.Bill_Type=@v_Bill_Type and
a.Item_No=@v_Item_No and
case when @v_Rev_Lett is not null then a.Item_No=@v_Rev_Lett else a.Item_No=@v_Rev_Lett end
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Oct 13, 2006
If you could help me with my syntax i would really appreciateit. I'm trying to change the where clause on the fly, but it'sgiving me a syntax error.Hopefully from what I have below you can tell what i'm afterthe first part should evaluate a boolean expression, then if true,search using one field, otherwisesearch using a different fieldWHERECase WHEN @myCompany = 933THEN tblClient.companycode = 933 --problem lineELSEtblCase.clientcode = @myClient --problem lineENDAnd tblCase.status = 'Active'thank you!!
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Jul 20, 2005
Can anyone tell me if it's possible to use a Case statement in a Whereclause, and if so, the proper syntax?J.R.Largo SQL ToolsThe Finest Collection of SQL Tools Availablehttp://www.largosqltools.com
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May 16, 2006
Is it possible to use CASE within a WHERE?
I have a query which is something like this, but it returns an error:
SELECT * FROM tablex
WHERE
CASE WHEN 'sexec' IS NOT NULL THEN
dm_marque = 'foo' AND year(dm_date) LIKE 'pyear' AND dm_month LIKE 'pmonth' AND dm_weekno LIKE 'pweek' and dm_sexec LIKE 'sexec' ELSE
dm_marque = 'foo' AND year(dm_date) LIKE 'pyear' AND dm_month LIKE 'pmonth' AND dm_weekno LIKE 'pweek' END
GROUP BY dm_marque
In this case sexec is a form parameter, if something is passed then I need to include it in the where statement, if it isn't I need to include something else. I am using CASE because there are three of these parameters and I want it to stop evaluating as soon as it matches as more than one may match but I only want to apply one.
Many thanks
Karen
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Aug 8, 2006
Hi all,
I am passing in a variable into a CASE statement. Based on the value, I want to return a set of values in an IN clause. Here is an example:
(The where clause will use a field called 'Location')
DECLARE @strTest as Varchar(50)
SET @strTest = 'HI'
SELECT * FROM [SomeTable]
WHERE
CASE @strTest
WHEN 'HI' THEN Location IN('1', '2', '3')
END
ORDER BY Location
Is this possible to do?
Sanctos
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Mar 13, 2008
Hi
I've been trying to put a simple case statement into my 'where' clause but having no luck, is there another way to do the following?
DECLARE @searchCriteria Int
SET @searchCriteria = 2
SELECT column1, column2 FROM TABLE WHERE
CASE @searchCriteria
WHEN 1 THEN (column3 = 1000100)
WHEN 2 THEN (column3 = 1000101)
END CASE
...cheers
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Jun 5, 2015
I have a population split between two vendors. One gets last names between A and R, the other the rest. Now, on a given date vendor 1 gets everybody.
I can accomplish this with a case statement on the upper range (R or Z), but it seems I should be able to do this without testing at all after the turnover date.
A small bit of the code:
declare @get_date datetime = convert(char(10),getdate(),101)
select top 10 pt.pt_id, pt.last_name
fromsmsmir.mir_acct a join smsmir.mir_pt pt on (a.src_sys_id = pt.src_sys_id
and a.pt_id = pt.pt_id
and a.from_file_ind = pt.from_file_ind
[Code] ....
Seems I should be able to not test the last name after the turnover date, but I can't figure out how.
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Jun 3, 2008
I am working on a Function that takes multiple parameters. I have a query that populates a temporary table, and then it processes some logic. My question is, if the parameter is passed as null, I dont want the query to be affected by this null value. Rather, I would like to not pass it at all to the query. So if the parameter is NULL, dont pass it through the query. I have the following but its not compiling right:
SELECT bom.pEngr_BOM_ID , bom.fEngr_Item_ID, det.pEngr_BOM_Detail_ID, 1, bom.Bill_Type, bom.Rev_Ltr, bom.Series_Ltr
FROM dbo.Engr_BOM_Control bom WITH (nolock)
INNER JOIN dbo.Engr_BOM_Detail det WITH (nolock)
ON det.fEngr_BOM_ID=bom.pEngr_BOM_ID
WHERE bom.pEngr_BOM_ID=@v_pEngr_BOM_ID
AND det.fEngr_BOM_ID=@v_pEngr_BOM_ID
CASE WHEN @v_Bill_Type IS NOT NULL THEN
AND bom.Bill_Type=@v_Bill_Type
END
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Jun 4, 2015
I have used the below update query. However, its updating only the first value. Like its updating AB with volume when c.Type = ABC, similarly for CD. Its not updating based on the 2nd or the next case condition.
Update XYZ Set AB = a.Amt * (CASE WHEN c.Type = 'ABC' THEN (c.volume)
WHEN c.TYPE = 'DEF' THEN (c.volume)
WHEN c.Type = 'GHI' THEN (c.volume)
Else 0
END),
CD = CASE WHEN c.Type = 'MARGIN' THEN '4105.31'
WHEN c.Type = 'ABC' THEN '123.1'
WHEN c.Type = 'DEF' THEN '234.2'
WHEN c.Type = 'GHI' THEN '567.1'
END
from table1 a join table2 b
on a.Cust = b.Customer
join table3 c
on b.account = c.account and b.channel =c.channel
Why its not working properly? But if i use Select statement instead of update query its working properly.
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May 20, 2004
When I created a CASE statement (This is at work, Pat:)) it is about 30-40 lines long. I gave it a name and set the name = to the case statement:
ie,
SELECT fieldname1 =
CASE
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
ELSE thisandthat
END
, fieldname2
, fieldname3
FROM tablename1
GROUP BY CASE
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
ELSE thisandthat
END, , fieldname2, fieldname3
etc.
The long CASE statement in my GROUP BY is awkward to me. Is this the only way to do it? I tried using the fieldname1 but it comes back as an invalid field name and asks for the "expression".
Regards,
Dave
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Aug 10, 2006
I am fairly new with SQL and still learning. I have used a case statemtent for a column in my select list and want to use the results of that statement's field in my WHERE clause but it is not working for me. Here is the code I have so far:
SELECT
l.loanid,
p.investorid,
l.duedate,
case when pc.duedate >= l.duedate then pc.duedate end as RateDueDate,
pc.interestrate
FROM loan l
inner join participation p on p.loanid = l.loanid
inner join paymentchange pc on pc.loanid = l.loanid
where p.investorid = '12345' and RateDueDate is not null
order by l.loanid, pc.duedate
I want to put the results of this case statment in my where clause like highlighted above but it is not working because RateDueDate is not an actual column in the table. Any help would be greatly appreciated.
Thanks!
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Aug 21, 2014
How I am using a CASE statement within a WHERE clause to filter data:
CREATE PROCEDURE dbo.GetSomeStuff
@filter1 varchar(100) = '',
@filter2 varchar(100) = ''
AS
BEGIN
SELECT
[Code] .
What I want, is to be able to pass in a single value to filter the table, or if I pass in (at the moment a blank) for no filter to be applied to the table.
Is this a good way to accomplish that, or is there a better way? Also, down the line I'm probably going to want to have multiple filter items for a single filter, what would be the best way to implement that?
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Nov 16, 2015
I have scenario where i have to pick one particular value from where condition. Here is the example:A store can have different types i-e A or B , A and B or either A or B.
Store Type Sales
11 A 1000
23 A 1980
23 B 50
5 B 560
I want to filter the store in "where clause" where
1)- if the store has type A and B, then assign only A
2)- if the store has type A associated with it then assign A
3)- if the store has type B associated with it, then assign B.
Select Store, sum(sales), Type
from table1
where (TYPE]= (case when [TYPE] in ('A','B') then 'A'
when [TYPE]='A' then 'A' else 'B'end))
GROUP BY [store], [TYPE]
The above statement is not working for when store has only Type B associated with it.
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May 8, 2006
Hi,
[SQL 2005 Express]
I would like a DropDownList to be populated differently depending on the selected value in a FormView.
If the FormView's selected value (CompanyID) is 2, then the DropDownList should show all Advisers from the relevant Company. Otherwise, the DropDownList should show all Advisers from the relevant Company where the TypeID field is 3.
Here is the SQL for case 1:
SELECT AdviserID, AdviserName FROM Advisers WHERE (CompanyID = @CompanyID).
Here's the SQL for case 2:
SELECT AdviserID, AdviserName FROM Advisers WHERE (CompanyID = @CompanyID) AND (TypeID = 3).
Here's my best (failed) attempt to get what I want:
SELECT AdviserID, AdviserName FROM Advisers WHERE IF @CompanyID = 2 THEN BEGIN (CompanyID = @CompanyID) END ELSE BEGIN (CompanyID = @CompanyID) AND (TypeID = 3) END
I've also tried:
SELECT AdviserID, AdviserName FROM Advisers WHERE CASE @CompanyID WHEN 2 THEN (CompanyID = @CompanyID) ELSE (CompanyID = @CompanyID) AND (TypeID = 3) END
and
SELECT AdviserID, AdviserName FROM Advisers WHERE CASE WHEN (@CompanyID = 2) THEN (CompanyID = @CompanyID) ELSE (CompanyID = @CompanyID) AND (TypeID = 3) END
I'd be very grateul to know (a) what the correct syntax for this is and (b) if it can be achieved using a parametised query, rather than a stored procedure.
Thanks very much.
Regards
Gary
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Dec 14, 2007
Hi all,
I have a table QT defined as
CREATE TABLE [dbo].[QT](
[Query] [nvarchar](50) NULL,
[Frequency] [int] NULL
) ON [PRIMARY]
Now based on a parameter I want to include a predicate in the select statement.
Basically I am trying to write something similar to the one below but possible only usinf one select statement.
if @queryString is null then
select query ,sum(frequency)
from qt
group by query
else
select query ,sum(frequency)
from qt
group by query
where query = @queryString.
Now is there a way to achieve this thing without using two separate select? The actual code I am trying to write is much bigger and I am trying to see if there is more compact way of expressing things.
Thanks
Aye.
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Jun 11, 2007
Is it possible to use a conditional statements in a where clause?
IE: I have 3 paramaters that may or may not be filled.
I would like to do something along the lines of...
Select * From (tables)
WHERE
If @param1 has value
Begin
'run this where statement
if @Param2 has value
'add this to the where clause
if @param3 has value
'add this to the where cluase
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Oct 8, 2007
Can I use "CASE WHEN ... THEN ... ELSE ... END" in the where clause of a SQL statement? I have sucessfully used it in the select portion of my statment but I would also like to use conditional criteria in the WHERE portion. Any advice is greatly appreciated.
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May 15, 2007
I have a store procedure where i need to use conditionel where clause
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Jul 20, 2005
hiI need to write a stored procedure that takes input parameters,andaccording to these parameters the retrieved fields in a selectstatement are chosen.what i need to know is how to make the fields of the select statementconditional,taking in consideration that it is more than one fieldaddedfor exampleSQLStmt="select"if param1 thenSQLStmt=SQLStmt+ field1end ifif param2 thenSQLStmt=SQLStmt+ field2end if
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Jan 25, 2008
Consider the following two functionally identical example queries:Query 1:DECLARE @Name VARCHAR(32)SET @Name = 'Bob'SELECT * FROM EmployeesWHERE [Name] = CASE WHEN @Name IS NULL THEN [Name] ELSE @Name ENDQuery 2:SELECT * FROM Employees WHERE [Name] = 'Bob'I would expect SQL Server to construct an identical QEP under the hoodfor these two queries, and that they would require essentially thesame amount of time to execute. However, Query 1 takes much longer torun on my indexed table of ~300,000 rows. By "longer", I mean thatQuery 1 takes about two seconds, while Query 2 returns almostinstantly.Is there a way to implement a conditional WHERE clause withoutsuffering this performance hit? I want to avoid using the IF...THENmethod because I frequently require several optional parameters in theWHERE clause.Thanks!Jared
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Jul 14, 2015
My source table has two columns... Policynum and PolicyStartdate and data looks like..
.
Policynum PolicyStartdate
123G 01/01/2012
456D 02/16/2012
789A 01/21/2012
163J 05/25/2012
Now my output should return based on 3 parameters..
First two parameters are date range... let say @fromdt and @todt
Third parameter is @policynum
Scenario-1: Enter dates in date range param and leave policynum param blank
Ex: policystartdate between '01/01/2012 and '01/31/2012'.... It returns 1st and 3rd rows from above in the output
Scenario-2: enter policy num in policynum param and don't select any dates
Ex: policynum ='456D' It returns 2nd row in the output
Scenario-3: Select dates in date range param and enter policynum in param
Ex: policystartdate between '01/01/2012 and '01/31/2012' and policynum
='163J'. it should return only 4th row even though dates were selected(Override date range when policynum is entered in param and just return specified policynum row in the output)
I need t-sql code to get above results.
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May 5, 2008
I am trying to merge 2 pieces( i.e procedures , or stored proc) of sql together.
My simple QueryA
SELECT colA, colB, colC, colD
FROM tableA
WHERE
colD IS NOT NULL
My simple QueryB
SELECT colA, colB, colC, colD
FROM tableA
WHERE
colC IS NOT NULL
I am trying to merge these 2 pieces if sql together by passing a input parameter which will decide which query to run. So if I pass an input parameter QueryA , it will run QueryA. If I pass an imput parameter QueryB, it will run QueryB.
Essentially both my queries are the same besides the where condition. Is there a way to merge it into one query (and not use if conditions and make my storedproc long) and apply the where condition depending on what input parameter is passed in ?
I know it can be done using dynamic SQL construction. But any other ways ?
Also can someone also give in the solution in PL/SQL.
Thanks a bunch.
Jaffery.
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