I am trying to build a distinct string in a query, which works unless one of the values is NULL. I've tested removing LOCATION_ADDR_LINE_2, and the query will work just fine. When I do not SELECT DISTINCT, I find that LOCATION_ADDR_LINE_2 values are NULL. How can I gather these values in the SELECT DISTINCT even if NULL?
SELECT DISTINCT(LOCATION_ADDR_LINE_1 + ', ' + LOCATION_ADDR_LINE_2 + ', ' + LOCATION_CITY + ', ' + LOCATION_WORK_STATE) AS Addresses
FROM OracleReport
WHERE (LOCATION_ADDR_LINE_1 LIKE '%1135 Auto%' OR LOCATION_ADDR_LINE_1 LIKE '%199 Easy%')
Returns:
Addresses
NULL
SELECT DISTINCT(LOCATION_ADDR_LINE_1 + ', ' + LOCATION_CITY + ', ' + LOCATION_WORK_STATE) AS Addresses
FROM [OperationReport].[dbo].[OracleReport]
WHERE (LOCATION_ADDR_LINE_1 LIKE '%1135 Auto%' OR LOCATION_ADDR_LINE_1 LIKE '%199 Easy%')
Returns:
Addresses
1135 Auto...
189-199 Easy...
Assuming you don't mind text,,text,... (empty string) when a value is NULL...
SELECT DISTINCT(coalesce(LOCATION_ADDR_LINE_1,'') + ', ' +
coalesce(LOCATION_ADDR_LINE_2,'') + ', ' +
coalesce(LOCATION_CITY,'') + ', ' +
coalesce(LOCATION_WORK_STATE,'')) AS Addresses
FROM OracleReport
WHERE (LOCATION_ADDR_LINE_1 LIKE '%1135 Auto%'
OR LOCATION_ADDR_LINE_1 LIKE '%199 Easy%')
Coalesce will take the first non-null value and return it. It requires consistent data types and will early exit once the first non-null value in a series is encountered. (more details Oracle Differences between NVL and Coalesce)
Related
I'm looking to remove a value that I define if a row returns NULL within a CONCAT function.
I'm not entirely sure how to go about it..
CONCAT('Floor:', ' ', l1.floor, ' ', 'Unit:', ' ', l1.unit_number, ' ', 'Buzzer:', ' ', l1.buzzer) as R_ADDRESS2,
I'd like each instance of values to be blank if the row is NULL.
So if l1.floor returns NULL then 'Floor:', ' ' don't showup in the column for R_ADDRESS2 either.
Same for l1.unit_number, and l1.buzzer.
How would I do that?
EDIT:
Here is how it is showing up currently:
r_address2
Floor: 10 Unit: Buzzer:
Floor: 2 Unit: 200 Buzzer:
Floor: Unit: Buzzer:
Use CONCAT_WS():
CONCAT_WS(' ',
('Floor: ' || l1.floor),
('Unit: ' || l1.unit_number),
('Buzzer: ' || l1.buzzer)
) as R_ADDRESS2,
|| returns NULL if any argument is NULL. However, CONCAT_WS() ignores NULL arguments, so the combination does what you want.
Here is a db<>fiddle.
concat function ignores nulls, "usual" concatenation does't. Use both of them.
CONCAT('Floor: ' + l1.floor + ' ', -- or cast(l1.floor as varchar) if it is int
'Unit: ' + l1.unit_number + ' ',
'Buzzer: ' + l1.buzzer) as R_ADDRESS2,
I am looking to subtract two string columns from another string column.
I have acheived this in the past in Oracle using the below
SELECT
C.MANUFACTURER,
C.MODEL_GROUP,
REGEXP_REPLACE(C.VARIANT, '^'||C.MANUFACTURER || ' +' || C.MODEL_GROUP) "VAR DESC",
C.VARIANT
FROM STD_BI.RL2_CONTRACTS_VW C
I now need to acheive the same in MS SQL any suggestions would be appreciated.
"Subtract" is surely a misnomer here. The OP appears to want to remove a string at the beginning of another string.
From this point on, I am assuming that MANUFACTURER and MODEL_GROUP do not contain any regular expression wildcard characters.
There is a challenge with multiple spaces. If there are not too many, then you can do. For instance, this handles one or two spaces:
SELECT C.MANUFACTURER, C.MODEL_GROUP,
(CASE WHEN C.VARIANT LIKE C.MANUFACTURER + ' ' + C.MODEL_GROUP + '%'
THEN STUFF(C.VARIANT, 1, LEN(C.MANUFACTURER + ' ' + C.MODEL_GROUP), '')
WHEN C.VARIANT LIKE C.MANUFACTURER + ' ' + C.MODEL_GROUP + '%' AND
THEN STUFF(C.VARIANT, 1, LEN(C.MANUFACTURER + ' ' + C.MODEL_GROUP), '')
ELSE C.VARIANT
END) as [VAR DESC],
C.VARIANT
FROM STD_BI.RL2_CONTRACTS_VW C;
EDIT:
Here is a more complete solution:
SELECT C.MANUFACTURER, C.MODEL_GROUP,
(CASE WHEN C.VARIANT LIKE C.MANUFACTURER + ' %' + C.MODEL_GROUP + '%' AND
C.VARIANT NOT LIKE C.MANUFACTURER + ' %[^ ]%' + C.MODEL_GROUP + '%'
THEN STUFF(LTRIM(STUFF(C.VARIANT, 1, LEN(C.MANUFACTURER), '')), 1, LEN(C.MODEL_GROUP), '')
ELSE C.VARIANT
END) as [VAR DESC],
C.VARIANT
FROM STD_BI.RL2_CONTRACTS_VW C;
This tests for just spaces between the two strings (the not like is checking for something other than a space). The replacement is then in three steps -- remove the manufacturer, then the spaces, then the model group.
I have spent some time on this one as much for my own satisfaction and in addition to the answer above, I have come up with the following which also generates the correct answer.
SUBSTRING(FV.VARIANT, LEN(FV.MANUFACTURER + ' ' + FV.MODEL_RANGE + ' ') + 1 , LEN(FV.VARIANT))
My problem was kinda easier to solve, I just needed to remove "xxxx" (the first 4 characters) at the start of a column from some rows:
UPDATE coluna SET columToEdit = SUBSTRING(columToEdit, 5, 200);
I have the following in a view
c2.title + ' ' + c2.initials + ' ' + c2.surname AS referredTo
As it stands now, if one of those values are null, then referredTo is just null. But for some of the records, the title, the initials, or the surname may be null. What is the best way to handle this so that is one or more of the values are null, it will return only the string with the non-null values. So for example, if title is null, it will only return "initals surname", if initials is null, it will return "title surname", if both are null, it will return "surname", etc, to cover any of those values being null. This is probably a really easy answer but I'm kinda new to SQL and having to learn as I go.
Thanks.
As suggested in the comment, put the White Space within the ISNULL:
SELECT ISNULL(Title + ' ', '') + ISNULL(Initials + ' ','') + ISNULL(Surname,'')
FROM YourTable;
That means that you don't end up with WhiteSpace at the front, or (possibly) two spaces between Title and Surname if Initials has a value of NULL.
Maybe you can use ISNULL, please check following statement
RTRIM(
LTRIM(
ISNULL(c2.title, '') + ' ' +
ISNULL(c2.initials, '') + ' ' +
ISNULL(c2.surname, '')
)
) AS referredTo
SET #FinalAnswer= ISNULL(#Col1, '') + ' ' +ISNULL(#Col2, '')
Try above approach.
Use Concat()
Select LTRIM(RTRIM(Concat(c2.title,' ',c2.initials,' ',c2.surname))) AS referredTo
FROM yourTable
DEMO
I have a stored procedure that is getting information from my employee table and returning the data.
There are 3 columns that are used:
B.[SiloDesc] + ' (' + B.[TitleDesc] + ') ' + B.[SkillSetDesc] as SkillSetDesc,
My issue is, if one of those happens to be null, it wont display any of the data. What is the best way to have it include the data regardless of if one of those fields are null.
You could use coalesce() or isnull() for each individual column... or you could simply use...
CONCAT ( string_value1, string_value2 [, string_valueN ] )
Takes a variable number of string arguments and concatenates them into a single string. It requires a minimum of two input values; otherwise, an error is raised. All arguments are implicitly converted to string types and then concatenated. Null values are implicitly converted to an empty string.
A.: Remove the parentheses when TitleDesc is null:
select concat(B.[SiloDesc], ' (' + B.[TitleDesc] + ')', ' ' + B.[SkillSetDesc])
Because of the way null is treated in sql, the expression ' (' + null + ')' results in null which concat() will treat as an empty string... which is kind of nice as it effectively removes the parentheses if the value is null.
B.: Keep the parentheses regardless:
select concat(B.[SiloDesc], ' (', B.[TitleDesc], ') ', B.[SkillSetDesc])
Samples:
select concat('john', ' (' + null + ')', ' adams') -- john adams
select concat('john', ' (test)', ' ' + null) -- john (test)
select concat('john', ' (the man)', ' adams') -- john (the man) adams
isnull(B.[SiloDesc], '')
+ ' (' + isnull(B.[TitleDesc], '') + ') '
+ isnull(B.[SkillSetDesc], '') as SkillSetDesc,
I have to create a View that shows a field created by concatenating some other fields. The simple query that I use is this one:
SELECT
CODPROY, DESCPROY, USER, CODPROY + ' - ' + USER + ' - ' + DESCPROY AS Expr
FROM
dbo.PROY
The problem is that USER may be NULL and in this case I have to insert a default text, something like 'NOT AVAILABLE'. Can this be done in a view?
Use coalesce if you are using SQL Server
SELECT
CODPROY,
DESCPROY,
USER,
CODPROY + ' - ' + COALESCE(USER,'NOT AVAILABLE') + ' - ' + DESCPROY AS Expr
FROM dbo.PROY
Yes, it can be done. You need to use IFNULL (mySQL) or something like it ..
CREATE VIEW foobar as
SELECT CODPROY
, DESCPROY
, USER
, CODPROY + ' - ' + IFNULL(USER,'DEFAULT') + ' - ' + DESCPROY AS Expr
FROM dbo.PROY;