I have a table containing Remarks as a column. Now i have to display the data inside remarks as 0 if the row is blank i.e empty but not Null. Please give me a query that will solve my problem in MS SQL server 2005.
Use SELECT ... CASE
SELECT remarksDisplay = CASE remarks WHEN '' THEN '0' ELSE remarks END
FROM tableName;
use a case statement in your SQL i.e
select (case when Remarks = '' then '0' else Remarks end) as Remarks from RemarksTable
You can further extend this to handle null values too if you want i.e
select (case when isnull(Remarks, '') = '' then '0' else Remarks end) as Remarks from RemarksTable
SELECT
case column1
when '' then 'unknown' /*empty*/
when ' ' then 'unknown' /*empty with space*/
end
FROM table
Related
In this project I'm currently working on (I'm building a bridge between a desktop app and a new e-shop) there is a products table that has some spare columns defined that can be used for whatever reason the end user might need some custom data to be stored into.
So, the user needed to set a true/false flag to determine whether the products would appear in three different sliders... Unfortunately, the person who implemented this, didn't even use the same type of spare columns... So,
Slider1's flag is stored in a varchar(50) column
Slider2's flag is stored in a float column
Slider3's flag is stored in a float column
Additionally I ran a SELECT DISTINCT <column> for each one of them to get an idea of the actual data stored in each column and got the following results:
The varchar column has the following data stored in it:
FLDSTRING1
NULL
''
0
1
194276400456
The float column has the following data stored:
FLDFLOAT5
NULL
0
1
And the other float column has this:
FLDFLOAT6
NULL
1
Also, I ran the following query to find the different combinations of the data stored for each column:
SELECT FLDSTRING1, FLDFLOAT5, FLDFLOAT6
FROM MATERIAL
GROUP BY FLDSTRING1, FLDFLOAT5, FLDFLOAT6
and got the following combinations...
FLDSTRING1
FLDFLOAT5
FLDFLOAT6
NULL
NULL
NULL
NULL
NULL
1
NULL
0
NULL
NULL
1
NULL
NULL
1
1
''
NULL
NULL
''
NULL
1
0
NULL
NULL
0
0
NULL
1
NULL
NULL
1
NULL
1
1
0
NULL
1
1
NULL
1
1
1
194276400456
0
NULL
What I need after all this introduction...
I want a concatenated string of three comma-separated values like this
NEWPROD for when FLDSTRING1 would evaluate to true - anything not NULL, 0, or ''
CUSTOM1 for when FLDFLOAT5 would evaluate to true - basically the value 1
CUSTOM2 for when FLDFLOAT6 would evaluate to true - again value 1
After some trial and error I managed to bring this to a point that it kind of works, in the sense that it brings the correct values, not comma-separated though...
SELECT
FLDSTRING1, FLDFLOAT5, FLDFLOAT6,
CONCAT(CASE WHEN ISNULL(FLDSTRING1, '') = '' THEN '' ELSE 'NEWPROD' END,
CASE WHEN ISNULL(FLDFLOAT5, '') = '' THEN '' ELSE 'CUSTOM1' END,
CASE WHEN ISNULL(FLDFLOAT6, '') = '' THEN '' ELSE 'CUSTOM2' END) AS TAGS
FROM
MATERIAL
GROUP BY
FLDSTRING1, FLDFLOAT5, FLDFLOAT6;
FLDSTRING1
FLDFLOAT5
FLDFLOAT6
TAGS
NULL
NULL
NULL
NULL
NULL
1
CUSTOM2
NULL
0
NULL
NULL
1
NULL
CUSTOM1
NULL
1
1
CUSTOM1CUSTOM2
''
NULL
NULL
''
NULL
1
CUSTOM2
0
NULL
NULL
NEWPROD
0
0
NULL
NEWPROD
1
NULL
NULL
NEWPROD
1
NULL
1
NEWPRODCUSTOM2
1
0
NULL
NEWPROD
1
1
NULL
NEWPRODCUSTOM1
1
1
1
NEWPRODCUSTOM1CUSTOM2
194276400456
0
NULL
NEWPROD
Problem #1 is I don't quite understand how this works... I mean, value 0 isn't '', but still for the combination of NULL 0 NULL I get an empty value, which is what I wanted... But how does it do that?
And also, can someone update my final query to comma-separate the calculated TAGS column? Problem #2 is that I don't want it to contain just two commas, like ,,, when the combination wouldn't justify any of the three values to appear... It should work like PHP's implode() works...
To help you help me with this, I'm including a fiddle with the setup of the scenario I describe here... Thanks in advance!
Since you are using SQL Server 2014, instead of CONCAT_WS you may try STUFF as shown below. By prepending the delimiter , before all strings ,the STUFF will remove the first comma found.
SELECT
FLDSTRING1,
FLDFLOAT5,
FLDFLOAT6,
STUFF(
CONCAT(
CASE WHEN FLDSTRING1 IS NULL OR FLDSTRING1 IN ('0','') THEN '' THEN '' ELSE ',NEWPROD' END,
CASE WHEN FLDFLOAT5 IS NULL THEN '' ELSE ',CUSTOM1' END,
CASE WHEN FLDFLOAT6 IS NULL THEN '' ELSE ',CUSTOM2' END
),
1,1,''
) AS TAGS
FROM #MATERIAL
GROUP BY FLDSTRING1, FLDFLOAT5, FLDFLOAT6;
View working demo db fiddle
Let me know if this works for you.
Use the CONCAT_WS() function to concat values into a comma (or other separator) separated list, which ignores nulls.
To use CONCAT_WS(), you want to pass it a true NULL if the value is "blank" (by your definition), otherwise your custom label:
SELECT DISTINCT
FLDSTRING1,
FLDFLOAT5,
FLDFLOAT6,
CONCAT_WS(',',
CASE WHEN FLDSTRING1 IS NULL OR FLDSTRING1 = '' OR FLDSTRING1 = '0' THEN NULL ELSE 'NEWPROD' END,
CASE WHEN FLDFLOAT5 IS NULL OR FLDFLOAT5 = 0 THEN NULL ELSE 'CUSTOM1' END,
CASE WHEN FLDFLOAT6 IS NULL OR FLDFLOAT6 = 0 THEN NULL ELSE 'CUSTOM2' END) AS TAGS
FROM MATERIAL
Replaced GROUP BY with DISTINCT because it's simpler and (here) achieves the same thing.
If CONCAT_WS is not available:
SELECT DISTINCT
FLDSTRING1,
FLDFLOAT5,
FLDFLOAT6,
REPLACE(REPLACE(REPLACE(CONCAT(
CASE WHEN FLDSTRING1 IS NULL OR FLDSTRING1 = '' OR FLDSTRING1 = '0' THEN 'X' ELSE 'NEWPROD' END,
',',
CASE WHEN FLDFLOAT5 IS NULL OR FLDFLOAT5 = 0 THEN 'X' ELSE 'CUSTOM1' END,
',',
CASE WHEN FLDFLOAT6 IS NULL OR FLDFLOAT6 = 0 THEN 'X' ELSE 'CUSTOM2' END
), ',X', ''), 'X,', ''), 'X', '') AS TAGS
FROM MATERIAL
See dbfiddle.
I have list of string like ('222','333','43242','3242') which I have to used in a table dummy, let say my table dummy has only two values from this list ('222','333'), the data should be show as
dummyID dummyStatus
222 Available
333 Available
43242 Not Available
3242 Not Available
I have tried all possible query like
select dummyId, case when dummyId is null 'Available' else 'Not Available' end
from dummy
where dummyId in ('222','333','43242','3242')
but this doesn't work.
demo on db<>fiddle
You Case When ... Then End syntax is incorrect
You should use Desired table values like below
select v1.value,
case when dummyId is not null then 'Available' else 'Not Available' end as dummyStatus
from (
values('222'),('333'),('43242'),('3242')
)v1(value)
left join (
values('222'),('333') -- Let's say your table here
)dummy(dummyId) on v1.value = dummy.dummyId
Updated (Param is '(222,333,43242,3242)')
Demo on db<>fiddle
Let's say we have a strSplit function to help us split from string to table, then you can achieve in this way
declare #str varchar(200) = '(222,333,43242,3242)'
set #str = REPLACE(REPLACE(#str,'(', ''), ')', '')
select v1.val,
case when dummyId is not null then 'Available' else 'Not Available' end as dummyStatus
from strSplit(#str, ',')v1
left join (
values('222'),('333') -- Let's say your table here
)dummy(dummyId) on v1.val = dummy.dummyId
Note: SQL Server 2016 and later have STRING_SPLIT Then You just do like this, demo on db<>fiddle
declare #str varchar(200) = '(222,333,43242,3242)'
set #str = REPLACE(REPLACE(#str,'(', ''), ')', '')
select v1.value,
case when dummyId is not null then 'Available' else 'Not Available' end as dummyStatus
from STRING_SPLIT(#str, ',')v1
left join (
values('222'),('333') -- Let's say your table here
)dummy(dummyId) on v1.value = dummy.dummyId
Output
I have a query where i used case when to KNOWN_AS column stating when its null then 'null' else 'not null' end as known_as2. Now in where clause i want to bring rows which only contain 'Not null' .
SELECT i.individual_ref, 0, 'KNOWNAS', i.FORENAMES, i.KNOWN_AS,
case when KNOWN_AS is null then 'Null' else ' Not null' end as known_as
FROM TestDatabase.dbo.INDIVIDUAL I
JOIN TestDatabase.dbo.MEMBER M ON M.INDIVIDUAL_REF=I.INDIVIDUAL_REF
WHERE m.member_status IN(33,1316)
AND i.KNOWN_AS IS null or i.KNOWN_AS=''
and m.MEMBER_STATUS in (33,1316)
and LEN(i.FORENAMES) > '1' and i.FORENAMES !=''
AND i.FORENAMES IS NOT NULL
Reason i'm want help is :-
I have a table which contain Forename, surname and known_as field.
I want to get members who's known_as field is blank/null and forename is not null or blank and forename length is >1 . How can i achieve it. the member status is from another table call member where i want member who are in active and pending status hence i said WHERE m.member_status IN (33,1316). Any solution please.
Finally I have solved it using
SELECT i.individual_ref,0,'KNOWNAS',
case when KNOWN_AS is null then 'Null' else ' Not null' end as knownas2
FROM TestDatabase.dbo.INDIVIDUAL I
JOIN TestDatabase.dbo.MEMBER M ON M.INDIVIDUAL_REF=I.INDIVIDUAL_REF
WHERE m.member_status IN(33,1316)
and len(i.forenames)>2 and
(IsNull(i.forenames, '') <> '') and (i.known_as is null or i.known_as='')
I had to take len(i.forenames, '')>2 instead of 1 because some members also has forename by mistakenly updated as Mr.
Now in where clause i want to bring rows which only contain 'Not null' .
Just modify your WHERE clause with IS NOT NULL as :
SELECT i.individual_ref, 0, 'KNOWNAS', i.FORENAMES, i.KNOWN_AS
FROM DiTestDatabase.dbo.INDIVIDUAL I JOIN
DiTestDatabase.dbo.MEMBER M
ON M.INDIVIDUAL_REF = I.INDIVIDUAL_REF
WHERE m.member_status IN (33,1316) AND
LEN(i.FORENAMES) > 1 AND i.FORENAMES != '' AND
i.FORENAMES IS NOT NULL AND i.KNOWN_AS IS NOT NULL;
Note :
LEN() will return INT type. So, you don't need to use ''.
Might be below query will help you.
SELECT i.individual_ref, 0, 'KNOWNAS', i.FORENAMES, i.KNOWN_AS
,CASE WHEN i.KNOWN_AS IS NULL THEN 'null'
ELSE 'Not null' END AS KNOWN_AS2
FROM DiTestDatabase.dbo.INDIVIDUAL I JOIN
DiTestDatabase.dbo.MEMBER M
ON M.INDIVIDUAL_REF = I.INDIVIDUAL_REF
WHERE m.member_status IN (33,1316) AND
LEN(i.FORENAMES) > 1 AND i.FORENAMES != '' AND
i.FORENAMES IS NOT NULL AND i.KNOWN_AS IS NOT NULL;
this way we can get solution
SELECT * FROM (
SELECT i.individual_ref, 0, 'KNOWNAS', i.FORENAMES, i.KNOWN_AS,
case when KNOWN_AS is null then 'Null' else 'Not null' end as known_as
FROM DiTestDatabase.dbo.INDIVIDUAL I
JOIN DiTestDatabase.dbo.MEMBER M ON M.INDIVIDUAL_REF=I.INDIVIDUAL_REF
WHERE m.member_status IN(33,1316)
AND i.KNOWN_AS IS null or i.KNOWN_AS=''
and m.MEMBER_STATUS in (33,1316)
and LEN(i.FORENAMES) > 1 and i.FORENAMES !=''
AND i.FORENAMES IS NOT NULL) t
WHERE t.known_as='Not null'
I have a case inside my stored procedure which I use before executing the data.
DECLARE #Setup nvarchar(50)
SELECT
#ZipCode = CASE
WHEN REPLACE(#ZipCode, '0', '') = ''
THEN NULL ELSE #ZipCode
END,
#ZipCodeEND = CASE
WHEN REPLACE(#ZipCodeEND, '0', '') = ''
THEN NULL ELSE #ZipCodeEND
END,
SELECT
#Setup = CASE WHEN (LEN(ISNULL(#ZipCode, ''))) > 0 THEN '1' ELSE '0' END +
CASE WHEN (LEN(ISNULL(#ZipCodeEND,''))) > 0 THEN '1' ELSE '0' END
IF ISNULL(#ID, 0) = 0
BEGIN
INSERT INTO dbo.MapToStaticValuesTable(ZipCode, ZipCodeEND, Setup)
VALUES(#ZipCode, #ZipCodeEND, #Setup)
END
The problem here is even if zipcode and zipcodeEnd are empty and set to null after being saved into the table I keep getting the value "11" instead of getting "00".
Now if I do the same example with nvarchar values it would work, but since ZipCode and ZipCodeEnd are set to int it's acting weird.
It is acting weird because you are using string functions on integers. Not sure what you are trying to achieve with your code but I'm sure it can be done just by checking the values as integers.
I guess this could be what you are looking for.
select case when nullif(#ZipCode, 0) is null then '0' else '1' end +
case when nullif(#ZipCodeEND, 0) is null then '0' else '1' end
One example of weird
select isNull(#ZipCode, '')
return 0 if #ZipCode is null.
Execute where clause depending on the column value
Hi, so here's my problem.
I need to have a query with a where clause bu the condition is depending on the value of a certain field.
Heres the structure:
ID NAME CUSTOMERTYPE STUDENTNO
basically here;s the lofic:
SELECT * FROM TRANSACTTABLE WHERE ID <> ''AND(NAME <> ''
--CASE WHEN CUSTOMERTYPE='STUDENT' THEN EXCEUTE THIS QUERY:
AND STUDENTNO <> '')
--ELSE WHEN CUSTOMERTYPE <> 'STUDENT' THEN EXECUTE JUST THIS:
)
PLEASE HELP. THANKS
Your query is showing some strange design - ID and CUSTOMERTYPE of type 'string', are you sure that it should be done this way?
SELECT *
FROM TRANSACTTABLE
WHERE ID <> '' AND
NAME <> '' AND
(CUSTOMERTYPE <> 'STUDENT' OR STUDENTNO <> '')
In MySQL you can use the IF function like this
SELECT * FROM TRANSACTTABLE
WHERE ID <> '' AND IF(CUSTOMERTYPE='STUDENT',STUDENTNO <> '',1=1)