SQL Server 2012 :: Filtering Query Using CASE Statement Within WHERE Clause
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?
i was tasked to created an UPDATE statement for 6 tables , i would like to update 4 columns within the 6 tables , they all contains the same column names. the table gets its information from the source table, however the data that is transferd to the 6 tables are sometimes incorrect , i need to write a UPDATE statement that will automatically correct the data. the Update statement should also contact a where clause
the columns are [No] , [Salesperson Code], [Country Code] and [Country Name]
i was thinking of doing
Update [tablename] SET [No] = CASE WHEN [No] ='AF01' THEN 'Country Code' = 'ZA7' AND 'Country Name' = 'South Africa' ELSE 'Null' END
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
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 :-)
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...
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
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
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
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
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
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!!
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
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.
I have a two tables each having a uniqueidentifier column person_id
I am trying to a select statement where I want a list of the person_id's in one table that are not in another table.
-- insert into wch_needed those who need checked
insert into #wch_needed (person_id, rendered_by ) select distinct e.person_id, e.rendered_by from #wch_who o, encounter e where o.person_id not in (select distinct person_id from #wch_have ) and o.person_id = e.person_id
the where conditional
where o.person_id not in (select distinct person_id from #wch_have )
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.
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.
Below is the scenario which I have currently in my query. I need to write this query without any hardcode values , so that it will work til n number of years without modifications.
Startdate = CASE WHEN Trandate between '06-04-2013' and '05-04-2014' then '06-04-2013' Trandate between '06-04-2012' and '05-04-2013' then '06-04-2012' Trandate between '06-04-2011' and '05-04-2012' then '06-04-2011' Trandate between '06-04-2010' and '05-04-2011' then '06-04-2010' Trandate between '06-04-2009' and '05-04-2010' then '06-04-2009' Trandate between '06-04-2008' and '05-04-2019' then '06-04-2008' END
I have a bit of trouble getting values into one alias field, my code is below. I am trying to get values into the alias extension, Agent_ID is sometimes null, and so is agent_id2, however sometimes they both have values in them, and then only one of the values is every returned. When in the example below only Agent_ID (11111) is ever returned by I want both of them returned.
Agent_ID Agent_ID2 11111 22222 <code> SELECT DISTINCT CASE WHEN [AGENT_ID] is not null then AGENT_ID when agent_id2 is not null then agent_id2 end as extension FROM [AA_Helper].[dbo].[tblEmpData] </code>
1. I have a simple JOIN statement between A and B, e.g. Cities A JOIN Countries B:
SELECT A.City_Name, B.Country_Code, B.Country_Area FROM Cities A JOIN Countries B ON B.Country_Id = A.Country_Id WHERE B.Country_Type='ABC';
That statement works absolutely fine, very fast (less than a second) and returns me 2 records
2. I need to replace Country Area column with 1 for Europe and 0 for all the rest. I implement so in the following way:
SELECT A.City_Name, B.Country_Code, CASE B.Country_Area WHEN 'EUR' THEN 1 ELSE 0 AS Country_Area FROM Cities A JOIN Countries B ON B.Country_Id = A.Country_Id WHERE B.Country_Type='ABC';
Now to get the same two records it takes 03:55 minutes (!)
I have looked into Estimated Execution Plan, but couldn't spot any difference - all straight forward.
It is SQL 2012 SP1 with compatibility level set to 110
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
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.
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".
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.
I have a stored proc that contains an update which utilizes a case statement to populate values in a particular column in a table, based on values found in other columns within the same table. The existing update looks like this (object names and values have been changed to protect the innocent):
UPDATE dbo.target_table set target_column = case when source_column_1= 'ABC'then 'XYZ' when source_column_2= '123'then 'PDQ'
[Code] ....
The powers that be would like to replace this case statement with some sort of table-driven structure, so that the mapping rules defined above can be maintained in the database by the business owner, rather than having it embedded in code and thus requiring developer intervention to perform changes/additions to the rules.
The rules defined in the case statement are in a pre-defined sequence which reflects the order of precedence in which the rules are to be applied (in other words, if a matching value in source_column_1 is found, this trumps a conflicting matching value in source_column_2, etc). A case statement handles this nicely, of course, because the case statement will stop when it finds the first "hit" amongst the WHEN clauses, testing each in the order in which they are coded in the proc logic.
What I'm struggling with is how to replicate this using a lookup table of some sort and joins from the target table to the lookup to replace the above case statement. I'm thinking that I would need a lookup table that has column name/value pairings, with a sequence number on each row that designates the row's placement in the precedence hierarchy. I'd then join to the lookup table somehow based on column names and values and return the match with the lowest sequence number, or something to that effect.
how SQL 2012 would treat a literal string for a comparison similar to below. I want to ensure that the server isn't implicitly converting the value as it runs the SQL, so I'd rather change the data type in one of my tables, as unicode isn't required.
Declare @T Table (S varchar(2)) Declare @S nvarchar(255) Insert into @T Values ('AR'), ('AT'), ('AW') Set @S = 'Auto Repairs' Select * from @T T where case @S when 'Auto Repairs' then 'AR' when 'Auto Target' then 'AT' when 'Auto Wash' then 'AW' end = T.STo summarise
in the above would AR, AT and AW in the case statement be treated as a nvarchar, as that's the field the case is wrapped around, or would it be treated as a varchar, as that's what I'm comparing it to.
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.
I have an Address column that I need to Substring. I want to remove part of the string after either, or both of the following characters i.e ',' OR '*'
Example Record 1. Elland **REQUIRES BOOKING IN*** Example Record 2. Theale, Nr Reading, Berkshire Example Record 3. Stockport
How do I achieve this in a CASE Statement?
The following two case statements return the correct results, but I some how need to combine them into a single Statement?
,LEFT(Address ,CASE WHEN CHARINDEX(',',Address) =0 THEN LEN(Address ) ELSE CHARINDEX(',' ,Address ) -1 END) AS 'Town Test'
,LEFT(Address ,CASE WHEN CHARINDEX('*',Address ) =0 THEN LEN(Address) ELSE CHARINDEX('*' ,Address ) -1 END) AS 'Town Test2'
