I want to use parameter in my query but I can't handle with it
I have 3 big selects to raport and I just want to use parameter for some part of code which depends from choice
I have 3 different Where conditions
1st
..WHERE A.CANCELLED = 'FALSE' AND a.open_amount!=0 AND A.IDENTITY = '&client_id'..
2nd
...WHERE A.CANCELLED = 'FALSE' AND A.IDENTITY = '&client_id' ...
3rd
WHERE AND A.CANCELLED = 'FALSE' AND a.invoice_amount != a.open_amount AND A.IDENTITY = '&client_id'
I tried with decode but I guess it could be ok if there would be value in 2nd case but there isn't and I cant decode like this
WHERE decode(xxx,x1,'AND a.open_amount!= 0',x2,'',x3, 'AND a.invoice_amount != a.open_amount')
How I should solve that problem any tips?
Do you mean, if the first "where condition" OR the second OR the third is/are TRUE, you want the overall to be TRUE (select the row), and you are looking for a simplified way to write it? That is, without simply combining them with OR?
To achieve that, you don't need CASE and nested CASE statements or DECODE. You could do it like this:
WHERE A.CANCELLED = 'FALSE'
AND A.IDENTITY = '&client_id'
AND ( (xxx = x1 AND a.open_amount != 0) OR (xxx = x2) OR
(xxx = x3 AND a.invoice_amount != a.open_amount) )
This is more readable, the intent is clear, it will be easier to modify if needed, ...
You can try something like -
WHERE A.CANCELLED = 'FALSE'
AND A.IDENTITY = '&client_id'
AND a.open_amount <>
(CASE
WHEN x1 THEN 0
WHEN x2 THEN a.open_amount + 1 -- This needs to be something that is always TRUE, to nullify the condition
WHEN x3 THEN a.invoice_amount
END);
Edit: This is based on the assumption that a.open_amount is a NUMBER and uses a quick hack where we create an always TRUE condition like x <> x + 1. You should probably change this to whatever suits you better based on your data.
Related
select fti.pa_serial_,fti.homeownerm_name,fti.ward_,fti.villagetole,fti.status,
ftrq.date_reporting, ftrq.name_of_recorder_reporting,
case
when fti.status='terminate' then ftrq.is_the_site_cleared ='1' end as is_the_site_cleared from fti join ftrq on ftrq.fulcrum_parent_id = fti.fulcrum_id
Here, is_the_site_cleared is text type of column which is converted into boolean by the when statement written and hence does not print as 1 and takes as true. I explicitly used print '1'. But this also did not work. My aim is to display '1' in the column 'is_the_site_cleared' when the value of fti.status='terminate'. Please help!!!
How about using integers rather than booleans?
select fti.pa_serial_, fti.homeownerm_name, fti.ward_,
fti.villagetole, fti.status, ftrq.date_reporting,
ftrq.name_of_recorder_reporting,
(case when fti.status = 'terminate' -- and ftrq.is_the_site_cleared = '1'
then 1 else 0
end) as is_the_site_cleared
from fti join
ftrq
on ftrq.fulcrum_parent_id = fti.fulcrum_id ;
From the description, I cannot tell if you want to include the condition ftrq.is_the_site_cleared = '1' in the when condition. But the idea is to have the then and else return numbers if that is what you want to see.
I faced the following requirement. The following query is called by a procedure. The value p_pac_code is the input parameter of the procedure.
The requirement is the query should have an additional condition sp_sbsp.SUBSPCLTY_CODE!='C430 if the p_pac_code value is '008'.
For any other p_pac_code value, it should run as it is below. Is there way to do this by adding an additional condition in the WHERE clause?
As for now, I have done this using IF.....ELSE using the query two times separately depending on p_pac_code value. But I am required to find a way to do with just adding a condition to this single query.
SELECT ptg.group_cid
FROM PRVDR_TYPE_X_SPCLTY_SUBSPCLTY ptxss,
PT_X_SP_SSP_STATUS pxsst ,
pt_sp_ssp_x_group ptg,
group_x_group_store gg,
specialty_subspecialty sp_sbsp,
treatment_type tt,
provider_type pt
WHERE
pt.PRVDR_TYPE_CODE = ptxss.PRVDR_TYPE_CODE
AND tt.TRTMNT_TYPE_CODE = pxsst.TRTMNT_TYPE_CODE
AND ptxss.PRVDR_TYPE_X_SPCLTY_SID = pxsst.PRVDR_TYPE_X_SPCLTY_SID
AND tt.TRTMNT_TYPE_CODE = p_pac_code
AND TRUNC(SYSDATE) BETWEEN TRUNC(PXSST.FROM_DATE) AND TRUNC(PXSST.TO_DATE)
AND ptg.prvdr_type_code =ptxss.prvdr_type_code
AND ptg.spclty_subspclty_sid = ptxss.spclty_subspclty_sid
AND ptxss.spclty_subspclty_sid = sp_sbsp.spclty_subspclty_sid
AND ptg.spclty_subspclty_sid = sp_sbsp.spclty_subspclty_sid
AND ptg.status_cid = 2
AND ptg.group_cid = gg.group_cid
AND gg.group_store_cid = 16
AND gg.status_cid = 2;
Thanks in advance.
You can simply add a condition like this:
... and (
( sp_sbsp.SUBSPCLTY_CODE!='C430' and p_pac_code = '008')
OR
NVL(p_pac_code, '-') != '008'
)
This can be re-written in different ways, this one is quite self-explanatory
Just add:
AND NOT ( NVL( sp_sbsp.SUBSPCLTY_CODE, 'x' ) = 'C430'
AND NVL( p_pac_code value, 'x' ) = '008' )
to the where clause.
The NVL function is used so that it will match NULL values (if they exist in your data); otherwise, even though NULL does not match C430 you will still find that NULL = 'C430' and NULL <> 'C430' and NOT( NULL = 'C430' ) will all return false.
Quite easy. Add the following condition:
AND (sp_sbsp.SUBSPCLTY_CODE != 'C430' OR p_pac_code value != '008')
(don't forget the parenthesis)
Just sharing
SELECT ptg.group_cid
FROM PRVDR_TYPE_X_SPCLTY_SUBSPCLTY ptxss
WHERE
pt.PRVDR_TYPE_CODE = ptxss.PRVDR_TYPE_CODE
&&((tt.TRTMNT_TYPE_CODE = pxsst.TRTMNT_TYPE_CODE)
or (tt.TRTMNT_TYPE_CODE = pxsst.TRTMNT_TYPE_CODE))
just use the parenthesis to specify where the conditionmust implement.
I need to pull back records based on a location ID, but I've got two fields that MAY contain the incoming criteria....
something like this
SELECT * FROM tbl
WHERE myVar = locationID
IF LocationID = 0
myVar = location2ID
this is a 'logical' example...
I think I can do
WHERE myVar = CASE WHEN locationID = 0 THEN location2ID ELSE locationID END
although I've read that CASE in a WHERE clause should be avoided...? why? or is this OK?
- either way it FAILS
WHERE CASE WHEN locationID=0 THEN location2ID=myVAr ELSE locationID=myVar END
also FAILS
thx
Sorry for the confusion lads - didn't mean to be "ambiguous" - looks like #2 will do what I want - but for the clarification requested here is the issue...
the table stores TWO locations, let's call then CURRENT_LOC and ORIGINAL_LOC... in most cases these will BOTH have data, but in some cases the 'thing' hasn't moved... so the CURRENT_LOC is '0'. MY issue is I'll be passing in a LOCATION ID, I want the records where CURRENT_LOC matches OR if the the CURRENT_LOC=0 then I ALSO want the ORIGINAL_LOC... where that matches...
does that help the discussion? I hope.
WHERE myVar = COALESCE(NULLIF(locationID, 0), location2ID)
Alternatively,
WHERE (
(locationID <> 0 AND myVar = locationID)
OR
(locationID = 0 AND myVar = location2ID)
)
I'm having some trouble figuring out why the SQL query below isn't working ... when members_only is set to 0, it's still showing them...
SELECT *
FROM reports
WHERE story = "1"
OR barebones = "1"
AND members_only = "1"
It depends on your data, but you may not be aware that AND has higher precedence in SQL than OR, so your query really evaluates to this:
SELECT *
FROM reports
WHERE story = '1'
OR (barebones = '1' AND members_only = '1')
Consider using different brackets per the other answers to explicitly declare your intentions
Use brackets to distinguish your clarify the WHERE-condition.
SELECT *
FROM reports
WHERE (story = '1' OR barebones = '1')
AND members_only = '1'
I would say because it reads the query as:
WHERE (story = '1') OR (barebones = '1' AND members_only = '1')
since story = '1', the condition is satisfied
OR clauses can be tricky - you often need to explicitly tell the query where it belongs. I assume, you want this:
WHERE (story = '1' OR barebones = '1') AND members_only = '1'
Missing parenthesis?
Did you want to do something like this:
SELECT *
FROM reports
WHERE (story = "1" OR barebones = "1") AND members_only = "1"
You are missing parenthesis.
The following code will work, assuming members_only HAS to be "1", but only story or barebones has to be "1".
SELECT *
FROM reports
WHERE
(story = "1" OR barebones = "1")
AND members_only = "1"
You should read up on TSQL Operator Precedence
In your original code, assume the following:
store = 1
barebones = 1
*members_only* = 0
Due to Operator Precedence, barebones and *members_only* is evaluated first, and evaluates to false.
Following this, the result of the first boolean evaluation (false) (also known as The Right Side) is compared to (story = "1") (also known as The Left Side).
The Right Side evaluates to false, but The Left Side evaluates to true.
Since the final boolean compression uses the OR operator, the end result is a TRUE, thus that record is indeed returned, no matter the value of either barebones or *members_only*, since The Left Side always evaluates to True.
I'm trying to create an SQL query in PHP to update a table.
Is it possible to have a different WHERE clause for each affected row?
eg something like:
UPDATE table
SET val=X WHERE someproperty = 1,
SET val=Y WHERE someproperty = 2
etc?
Any help appreciated. Thanks
Yes, you can with a CASE statement.
UPDATE table
SET val = CASE someproperty
WHEN 1 THEN x
WHEN 2 THEN y
....
ELSE
val
END
Now, there is concern that one CASE statement is less readable when compared to several UPDATE statements. There is a valid argument here. For example, when 1000 rows are being updated, it just feels and looks better to use several UPDATE statements rather than 1000 different conditions to a single CASE.
However, sometimes a CASE statement is more appropriate. If, for example, you are updating rows based on some trait, say the even or odd nature of a field's value the table, then a CASE statement is a wonderfully concise and maintainable way to update rows in the table without having to resort to a huge number of UPDATE statements that all share a specific type of logic. Take this for example:
UPDATE table
SET val = CASE MOD(someproperty, 2)
WHEN 0 THEN x
WHEN 1 THEN y
END
This expression takes the modulus of someproperty and, when 0 (even), assigns value x to val and, when 1 (odd), assigns value y to val. The greater the volume of data being updated by this statement, the cleaner it is compared to doing so by multiple UPDATE statements.
In short, CASE statements are sometimes just as readable/maintainable as UPDATE statements. It all depends on what you are trying to do with them.
EDIT: Added the ELSE clause to be extra safe. The OP may be interested in updating only specific rows so the rest should remain as they prior to the UPDATE.
EDIT: Added a scenario where the CASE statement is a more effective approach than multiple UPDATE statements.
You cannot have multiple WHERE clauses for any SQL statement, however you can use a CASE statement to accomplish what you are trying to do. Another option that you have is to execute multiple UPDATE statements.
Here is a sample using the CASE statement:
UPDATE table
SET val = (
CASE someproperty
WHEN 1 THEN X
WHEN 2 THEN Y
ELSE val
END
);
Here is a sample using multiple UPDATE statements:
UPDATE table SET val=X WHERE someproperty = 1;
UPDATE table SET val=Y WHERE someproperty = 2;
Nope. Make it two updates:
UPDATE table SET val=X WHERE someproperty = 1;
UPDATE table SET val=Y WHERE someproperty = 2;
On second thought, you could use sub-queries or the case statement...
UPDATE table SET val= ( case when someproperty = 1 then X when someproperty = 2 then Y else val END )
You may need to make that a sub query like this:
UPDATE table t1 SET val = ( select CASE when someproperty = 1 then X when someproperty = 2 then Y ELSE val END from table t2 where t1.primarykey = t2.primary key )
UPDATE TABLE
SET VAL CASE SOMEPROPERTY WHEN 1 THEN X WHEN 2 THEN Y END
A compact and easily scaleable way:
UPDATE table1 SET val=ELT(FIND_IN_SET(someproperty, '1, 2'), X, Y);
make the query this way:
$condition = array(1, 2);
$newvals = array('X', 'Y');
$query = "UPDATE table1 SET val=ELT(FIND_IN_SET(someproperty, '". implode(',', $condition). "', ". implode(', ', $newvals). ")";
Use prepare_query to avoid SQL syntax errors if you deal with string values.