I was wondering if we can change the label of the select statement like we do for data in sql select using CASE
SELECT CASE column1 = 1 THEN 1 ELSE 0 END AS [Available]
But can we have a dynamic header something like
SELECT column1 AS <-- Available when 1 or Not Available when 0
This can be handled on the front end but its wise if we have it on backend. Any help or useful link is appreciated
You can do it with dynamic sql and if...else instruction but it not make sense for me. In relational database value in the cell tells you if something is available or not. If header tells you the same as cell it's duplicate information. If you want to description of the value you can use case syntax instead of 0/1 value
SELECT CASE when column1 = 1 THEN 'Available'
ELSE 'Not available'
END AS [Available]
Well, that would not make sense, as what would you expect the column name to be if you hade 2 rows, one with 1 (being available) and the other with 0(being Not Available)?
You would have to stick to something like
SELECT
CASE
WHEN column1 = 1
THEN 'Available'
ELSE 'Not available'
END as Availability
FROM YourTable
Related
I have a table with following columns :
SalaryStructure:
Id StructureName IsApplicable IsActive
IsApplicable - bit, not null
"IsApplicable" is a newly added column which has all the values as "false" by default.
Now, I want to update "IsApplicable" based on pattern matching logic and then set the value of "IsApplicable" based on that.
Query:
SELECT
CASE
WHEN (StructureName LIKE '%Associate1%' OR StructureName Like '%Tier1%')
THEN 'No' ELSE 'Yes' END AS IsApplicable,
FROM SalaryStructure
WHERE IsActive = 0
I want to run above script on same table SalaryStructure and update the values "Yes" and "No" in the column "IsApplicable".
But I am not getting how to include this part in "Update" statement. I want update all the records in the SalaryStructure table.
Can someone please help me?
Neither 'Yes' or 'No' are valid bit values, a non-NULLable bit column can store 1 or 0 and that is it. I therefore assume 'No' should be 0 and 'Yes' should be 1.
As for the UPDATE it would, in truth, look like another other UPDATE on a single table. UPDATE...SET...WHERE:
UPDATE dbo.SalaryStructure
SET IsApplicable = CASE WHEN (StructureName LIKE '%Associate1%' OR StructureName LIKE '%Tier1%') THEN 0
ELSE 1
END
WHERE IsActive = 0;
I have a column in table which is having single/multiple value. I have to convert it yes/no based on condition.
example:
rendition_type_sys
distribution
uploaded, distribution
uploaded
single
I need to change the value based on condition. If column having distribution then value should convert as 'Yes' otherwise 'No'
Final Output:
rendition_type_sys
Yes
Yes
No
No
I tried one case statement but that is working for single value not multiple value-
case when ren.rendition_type__sys='distribution' then 'Yes' else 'No' end as rendition_type__sys
First, you should fix your data model so you are not storing multiple values in a string.
In the meantime, like should do what you want. For your example:
(case when ren.rendition_type__sys like '%distribution%'
then 'Yes' else 'No'
end) as rendition_type__sys
Note: In case "distribution" is part of an element name and you don't want that, you can check for delimiters. In Standard SQL, this would be:
(case when ', ' || ren.rendition_type__sys || ', ' like '%, distribution, %'
then 'Yes' else 'No'
end) as rendition_type__sys
The string concatenation operator may vary depending on the database you are using.
This below code would work assuming distribution is not part of any other discrete value; here is the code in a sample form:
WITH rt AS (
SELECT 'distribution' AS rendition_type_sys
UNION SELECT 'uploaded, distribution'
UNION SELECT 'uploaded'
UNION SELECT 'single'
)
SELECT CASE WHEN rt.rendition_type_sys LIKE 'distribution' THEN 'Yes' ELSE 'No' END AS Col
FROM rt
You might consider adding a table with for these "tags" so that they are discrete.
I'm beginner in SQL,is it possible to change column name in CASE statement.
I've a column name as "Inbound" the value for it can be '1' or '2'. If it's 1 the column name should be AS "IN" ELSE "OUT".
Any help is greatly appreciated.
You can not generate dynamic column names. Queries should be static. But what you could do is for instance:
select case when inbound = 1 then 'yes' end as in_result,
case when inbound = 2 then 'yes' end as out_result
from your_table
I want to compare two numbers. Let's take i.e. 1 and 2.
I've tried to write the following query but it simply doesn't work as expected (Toad says: ORA-00923: FROM keyword not found where expected):
SELECT 1 > 2 from dual
The DECODE is something like a Switch case, so how can I get the result of an expression evalutation (i.e. a number comparison) putting it in the select list?
I have found a solution using a functions instead of an expression in the SELECT LIST: i.e.
select DECODE(SIGN(actual - target)
, -1, 'NO Bonus for you'
, 0,'Just made it'
, 1, 'Congrats, you are a winner')
from some_table
Is there a more elegant way?
Also how do I compare two dates?
There is no boolean types in sql (at least in oracle).
you can use case:
SELECT CASE when 1 > 2 THEN 1 ELSE 0 END FROM dual
But your solution (decode) is also good, read here
The SIGN() function is indeed probably the best way of classifying (in)equality that may be of interest to you if you want to test a > b, a = b and a < b, and it will accept date-date or numeric-numeric as an argument.
I'd use a Case statement by preference, rather than a decode.
Select
case sign(actual-target)
when -1 then ...
when 0 then ...
when 1 then ...
end
SELECT (CASE
WHEN (SIGN(actual - target) > 0 ) THEN
'NO Bonus for you'
ELSE
'Just made it' END)
FROM dual
you can compare two dates with sql
METHOD (1):
SELECT TO_DATE('01/01/2012') - TO_DATE('01/01/2012')
FROM DUAL--gives zero
METHOD (2):
SELECT CASE
when MONTHS_BETWEEN('01/01/2012','01/01/2010') > 0
THEN 'FIRST IS GREATER'
ELSE 'SECOND IS GREATER OR EQUAL' END
FROM dual
sorry i cant format the code the formatting toolbar disappeared !
do any one know why?
I'm trying to compose an SQL SELECT query with multiple search words. But I want the result be ordered by number of words matches.
For example, let the search string is "red green blue". I want the results which contains all these three words on top, after that the results, which contains two of them, and at the end - only one word matches.
SELECT
*
FROM
table
WHERE
(col LIKE '%red%') OR
(col LIKE '%green%') OR
(col LIKE '%blue%')
ORDER BY
?????
Thanks in advance!
ORDER BY
(
CASE
WHEN col LIKE '%red%' THEN 1
ELSE 0
END CASE
+
CASE
WHEN col LIKE '%green%' THEN 1
ELSE 0
END CASE
+
CASE
WHEN col LIKE '%blue%' THEN 1
ELSE 0
END CASE
) DESC
If your DB vendor has IF, you can use it instead of CASE (e.g., for Mysql you can write
IF (col LIKE '%red% , 1,0) + IF(....'
What platform are you using? if SQL Server, then it sounds like a Full Text Search archtecture would be your best fit.
http://msdn.microsoft.com/en-us/library/ms142583.aspx