I'm trying to write a stored procedure that will have 6 bit value flags as parameters and a couple of other values.
The pseudo sql I want to write is something like:
SELECT *
FROM theTable
WHERE
IF #flagA = 1 THEN theTable.A = 1
IF #flagB = 1 THEN theTable.B = 1
IF #flagC = 1 THEN theTable.CValue = #cValue
etc
Any ideas how I can do this in SQL or am I best reverting to building the SQL in C# (where this SP will be called from)?
SELECT *
FROM theTable
WHERE
(#flagA = 0 or (#flagA = 1 AND theTable.A = 1 ))
and (#flagB = 0 or (#flagB = 1 AND theTable.B = 1 ))
and (#flagC = 0 or (#flagC = 1 AND theTable.CValue = #cValue ))
Note: I am assuming your bit flags are non-nullable. If that is not the case, you will need to use ISNULL.
Related
I have the below OR statement with each column = 1 as the condition. Is there a shorter way of doing this? I have tried HAVING and IN but neither worked.
(count(distinct case when (fiscal_mth_idnt_june21 = 1 or fiscal_mth_idnt_july21 = 1 or fiscal_mth_idnt_august21 = 1) then contact_key end)) / sum(fiscal_mth_idnt_may21)*100 as within_three_months
is the main code I am interested in.
The boolean expression:
fiscal_mth_idnt_june21 = 1 or fiscal_mth_idnt_july21 = 1 or fiscal_mth_idnt_august21 = 1
is equivalent to:
1 IN (fiscal_mth_idnt_june21, fiscal_mth_idnt_july21, fiscal_mth_idnt_august21)
I have tables where I have a result of 0-1 0 is gone and 1 is. I need to write a query, and I totally don't know how to. If New_Def = 0 a Default = 1 then 'NEW' If New_Def = 1 a Default = 1 then = OLD.
I think you are looking for case :
select * , case when New_Def = 0 and Default = 1 then 'NEW'
when New_Def = 1 and Default = 1 then 'OLD'
else 'Unknown'
end as Newcolumn
from table
How do I change the following code to an if statement that returns a boolean 0 or 1 value? My end results I would like to have, is one column listing the interest rate of 2, and my results column with a 0 or 1 if the condition is true.
(Case when new_interestratevariability = 2
and (new_interestrateindex = 1 or new_interestrateindex = 2 or new_interestrateindex = 3 or new_interestrateindex = 4 or new_interestrateindex = 6)
and new_crms_dt = #Curr_Date
then 0 else 1 end) as CIEDIT_VAL_96,
Currently, I am getting something like below:
Results Table
To filter rows, use a Where clause. The Case statement in the Select clause will modify the value shown on the row.
Select *
from table
Where new_interestratevariability = 2
and new_interestrateindex IN (1,2,3,4,6)
and new_crms_dt = #Curr_Date
Found my answer, it was as simple as adding "not in" instead of just "in". Thanks everyone
(Case when new_interestratevariability = 2
and (new_interestrateindex not in(1,2,3,4,6))
and new_crms_dt = #Curr_Date
then 1 else 0 end) as CIEDIT_VAL_96,
I am working on a legacy system which has a custom java implementation for generating SQL queries. That doesn't support 'IN' operation.
To implement 'IN' I have written something like
SELECT * from Q
WHERE IS_HIDDEN = 0 AND ID = 1
OR ID = 2 OR ID = 3 AND IS_DELETED = 0;
I know that the one like below would have been fine.
SELECT * from Q
WHERE IS_HIDDEN = 0 AND (ID = 1
OR ID = 2 OR ID = 3) AND IS_DELETED = 0 ;
Both these return the same result but I'm not too confident about SQL operator priorities. I had read that AND takes precedence
Is it safe to assume that both the SQL statemets are equivalent.
The actual query that I wanted to write is
SELECT * from Q
WHERE IS_HIDDEN = 0 AND ID IN(1, 2, 3) AND IS_DELETED = 0;
The DB in question is oracle 10g.
Update: The reason that this was working is because the oracle CBO rearranges the subclauses in the where clause.
No your queries are not the same
SELECT * from Q
WHERE IS_HIDDEN = 0 AND ID = 1
OR ID = 2 OR ID = 3 AND IS_DELETED = 0;
is like
SELECT * FROM Q WHERE IS_HIDDEN = 0 AND ID = 1
UNION
SELECT * FROM Q WHERE ID = 2
UNION
SELECT * FROM Q WHERE ID = 3 AND IS_DELETED = 0
when you use the parentheses for your ORs then you have the same like the IN-Clause
You can try it: SQLFiddle
You first query is equal to the IN. You should use that:
Your second query is like this:
SELECT * from Q
WHERE (IS_HIDDEN = 0 AND ID = 1) OR ID = 2 OR (ID = 3 AND IS_DELETED = 0);
If IS_HIDDEN is 1 or DELETED Is 1, but ID is 2, your query will still give you records. Try it..
I'm not good at asking question, so i'll give an example of what i want to have.
if i = 1 and xi = 0 then
select a,b,c,d,e,f,g where z = 1
elseif i=0 and xi = 1 then
select a,c,f,h,l,n where w = var
elseif i=1 and xi=1 then
select a,b,c,d,e,f,g, where z = 1
union all
select a,c,f,h,l,n where w = var
end if
How can I join the 2 select statement if their columns are not equal and they both have a unique condition?
Based on the conditions you can create derived tables to fetch desired columns and then to get a union of the two tables add null values in column list of derived tables which have less number of columns:
Pseudo code:
select * from
(select a,b,c,d,e,f,g
where z = 1
and 1 = case when i = 1 and xi = 0 then 1
when i = 1 and xi = 1 then 1
else 0
end) as T1
union all
(select a,c,f,h,l,n ,null -- add null value to equate number of columns
where w = var
and 1 = case when i=0 and xi = 1 then 1
when i=1 and xi = 1 then 1
else 0
end) as T2
Hope this helps!!!
If it is not a requirement not to use dynamic sql I will opt for that one.
Another idea will be to use user defined function returnin tables.
So you encapsulate there the logic...