I am approaching this issue from a non DBA perspective, as in I do not have permissions to create new tables for the database. I am trying to work around this by using a subquery in Oracle kind of like this sudo code:
With temptable as ('col1name', 'col2name', 1,'a',2,'b')
Select * from temptable where col1name = 1
With the temptable looking like
Col1name | Col2name
1 a
2 b
And the output being row 1. I know it is not the easiest way to do it, but it is all I can think of to accomplish my task until I can get the admin to approve a new table. I have searched a lot but I can't find an answer. Is there a simple way to define temporary table data like this?
I would just do this as:
with temptable as (
select 1 as col1name, 'a' col2name from dual union all
select 2, 'b' from dual
)
Select *
from temptable
where col1name = 1;
As an alternative to a CTE (common table expresssion) as suggested by Gordon, you can also use a query as an old-school inline view.
For example:
SELECT tt.col1name
, tt.col2name
FROM ( SELECT 1 AS col1name, 'a' AS col2name FROM DUAL
UNION ALL SELECT 2, 'b' FROM DUAL
UNION ALL SELECT 3, 'c' FROM DUAL
) tt
WHERE tt.col1name = 1
ORDER
BY tt.col1name
Related
I have a script that extracts transactions and their details from a database. But my users complain that the file size being generated is too large, and so they asked for certain transactions to be just summed up/consolidated instead if they are of a certain classification, say Checking Accounts. That means there should only be one line in the result set named "Checking" which contains the sum of all transactions under Checking Accounts. Is there a way for an SQL script to go like:
CASE
WHEN Acct_class = 'Checking'
then sum(tran_amount)
ELSE tran_amount
END
I already have the proper GROUP BY and ORDER BY statements, but I can't seem to get my desired output. There is still more than one "Checking" line in the result set. Any ideas would be very much appreciated.
Try This,
Select sum(tran_amount) From tran_amount Where Acct_class = 'Checking'
You can try to achieve this using UNION ALL
SELECT tran_amount, .... FROM table WHERE NOT Acct_class = 'Checking'
UNION ALL
SELECT SUM(tran_amount), .... FROM table WHERE Acct_class = 'Checking' GROUP BY Acct_class, ...;
hi you can try below sql
select account_class,
case when account_class = 'saving' then listagg(trans_detail, ',') within group (order by emp_name) -- will give you all details transactions
when account_class = 'checking' then to_char(sum(trans_detail)) -- will give you only sum of transactions
end as trans_det from emp group by account_class;
Or, if your desired output is getting either the sum, either the actual column value based on another column value, the solution would be to use an analytical function to get the sum together with the actual value:
select
decode(acct_class, 'Checking', tran_amount_sum, tran_amount)
from (
select
sum(tran_amount) over (partition by acct_class) as tran_amount_sum,
tran_amount,
acct_class
from
YOUR_TABLE
)
You can try something like the following, by keeping single rows for some classes, and aggregating for some others:
with test (id, class, amount) as
(
select 1, 'a' , 100 from dual union all
select 2, 'a' , 100 from dual union all
select 3, 'Checking', 100 from dual union all
select 4, 'Checking', 100 from dual union all
select 5, 'c' , 100 from dual union all
select 6, 'c' , 100 from dual union all
select 7, 'c' , 100 from dual union all
select 8, 'd' , 100 from dual
)
select sum(amount), class
from test
group by case
when class = 'Checking' then null /* aggregates elements of class 'b' */
else id /* keeps elements of other classes not aggregated */
end,
class
I have the below code to show what I am "trying" to accomplish in a stored procedure:
select * from
(
select to_char(sum(aa.amount))
from additional_amount aa, status st
where aa.int_tran_id = st.int_tran_id
and st.stage in ('ACHPayment_Confirmed')
and aa.entry_timestamp > (
select to_date(trunc(last_day(add_months(sysdate,-1))+1), 'DD-MON-RR') AS "day 1"
from dual
)
)
UNION ALL
(
select distinct it.debit_acct as "debit_accounts"
from internal_transactions it
where it.debit_acct IN ( select texe_cnasupro
from service.kndtexe, service.kndtctc
where texe_cncclipu = tctc_cncclipu
and tctc_cntipcli = 'C'
)
)
union all
(select distinct it.credit_acct as "credit_account"
from internal_transactions it
where it.credit_acct IN (select texe_cnasupro
from service.kndtexe, service.kndtctc
where texe_cncclipu = tctc_cncclipu
and tctc_cntipcli = 'C'
)
)
;
Output:
TO_CHAR(SUM(AA.AMOUNT))
----------------------------------------
130250292.22
6710654504
0000050334
2535814905
0007049560
5 rows selected
The top row of the output is what I need in the SP as output based on the below two queries which I am guessing needs to be sub-queried against the top select statement.
The top select is to select the sum of the amount a table with a join against another table for filtering (output:130250292.22).
The second and third selects is actually to check that the accounts in the internal_transactions table are signed up for the corresponding two tables in the service db which is a different db on the same server(owned by the same application).
The tables in the "service" db do not have the same common primary keys as in the first select which is against the same database.
Thank you for your help!
I don't understand your question, but I do know you can simplify this bit:
to_date(trunc(last_day(add_months(sysdate,-1))+1), 'DD-MON-RR') AS "day 1"
to this
trunc (sysdate, 'mm')
and you don't need a SELECT from DUAL to do that either.
and aa.entry_timestamp > trunc (sysdate, 'mm')
What is the equivalent of the Oracle "Dual" table in MS SqlServer?
This is my Select:
SELECT pCliente,
'xxx.x.xxx.xx' AS Servidor,
xxxx AS Extension,
xxxx AS Grupo,
xxxx AS Puerto
FROM DUAL;
In sql-server, there is no dual you can simply do
SELECT pCliente,
'xxx.x.xxx.xx' AS Servidor,
xxxx AS Extension,
xxxx AS Grupo,
xxxx AS Puerto
However, if your problem is because you transfered some code from Oracle which reference to dual you can re-create the table :
CREATE TABLE DUAL
(
DUMMY VARCHAR(1)
)
GO
INSERT INTO DUAL (DUMMY)
VALUES ('X')
GO
You don't need DUAL in MSSQLserver
in oracle
select 'sample' from dual
is equal to
SELECT 'sample'
in sql server
While you usually don't need a DUAL table in SQL Server as explained by Jean-François Savard, I have needed to emulate DUAL for syntactic reasons in the past. Here are three options:
Create a DUAL table or view
-- A table
SELECT 'X' AS DUMMY INTO DUAL;
-- A view
CREATE VIEW DUAL AS SELECT 'X' AS DUMMY;
Once created, you can use it just as in Oracle.
Use a common table expression or a derived table
If you just need DUAL for the scope of a single query, this might do as well:
-- Common table expression
WITH DUAL(DUMMY) AS (SELECT 'X')
SELECT * FROM DUAL
-- Derived table
SELECT *
FROM (
SELECT 'X'
) DUAL(DUMMY)
In SQL Server there is no dual table. If you want to put a WHERE clause, you can simple put it directly like this:
SELECT 123 WHERE 1<2
I think in MySQL and Oracle they need a FROM clause to use a WHERE clause.
SELECT 123 FROM DUAL WHERE 1<2
This could be of some help I guess, when you need to join some tables based on local variables and get the information from those tables:
Note: Local variables must have been
Select #XCode as 'XCode '
,#XID as 'XID '
,x.XName as 'XName '
,#YCode as 'YCode '
,#YID as 'YID '
,y.YName as 'YName '
From (Select 1 as tst) t
Inner join Xtab x on x.XID = #XID
Inner join Ytab y on y.YID = #YID
It's much simpler than that.
Use literal values to establish data types.
Put quotes around column names if they need special characters.
Skip the WHERE clause if you need 1 row of data:
SELECT 'XCode' AS XCode
,1 AS XID
,'XName' AS "X Name"
,'YCode' AS YCode
,getDate() AS YID
,'YName' AS "Your Name"
WHERE 1 = 0
I got around 18 db's. All these db's have the same structure. I want to query all these db's once to get my results.
Example:
ShopA
ShopB
ShopC
These db's got all the table article (and also the same rows).
How do I get all articles in one result with a WHERE?
I thought:
select *
from shopa.dbo.article
shopb.dbo.article
shopc.dbo.article
where color = 'red'
Did someone got an idea?
Have you considered doing a UNION ALL?
So something like:
SELECT 'a' AS Shop, *
FROM shopa.dbo.article
WHERE color = 'red'
UNION ALL
SELECT 'b' AS Shop, *
FROM shopb.dbo.article
WHERE color = 'red'
UNION ALL
SELECT 'c' AS Shop, *
FROM shopc.dbo.article
WHERE color = 'red'
Or, with a CTE (if you RDBMS supports it)
;WITH allstores AS (
SELECT 'a' AS Shop, *
FROM shopa.dbo.article
UNION ALL
SELECT 'b' AS Shop, *
FROM shopb.dbo.article
UNION ALL
SELECT 'c' AS Shop, *
FROM shopc.dbo.article
)
SELECT *
FROM allstores
WHERE color = 'red'
you could use UNION
if you can simply select the db names you could also use a cursor select with OPENQUERY on a dynamically created string insert into a temp table and select from that
You can create a View wich is populated from your select as this:
CREATE VIEW view_name AS
SELECT * FROM shopa.dbo.article
UNION
SELECT * FROM shopb.dbo.article
UNION
SELECT * FROM shopc.dbo.article
Then you can try to run a query by the View
Select * from view_name
where color = 'red'
Then if you want write another query with another condition, you don't write another big query with union or other code.
You can just write a query on a VIEW
Is it possible to keep order from a 'IN' conditional clause?
I found this question on SO but in his example the OP have already a sorted 'IN' clause.
My case is different, 'IN' clause is in random order
Something like this :
SELECT SomeField,OtherField
FROM TestResult
WHERE TestResult.SomeField IN (45,2,445,12,789)
I would like to retrieve results in (45,2,445,12,789) order. I'm using an Oracle database. Maybe there is an attribute in SQL I can use with the conditional clause to specify to keep order of the clause.
There will be no reliable ordering unless you use an ORDER BY clause ..
SELECT SomeField,OtherField
FROM TestResult
WHERE TestResult.SomeField IN (45,2,445,12,789)
order by case TestResult.SomeField
when 45 then 1
when 2 then 2
when 445 then 3
...
end
You could split the query into 5 queries union all'd together though ...
SELECT SomeField,OtherField
FROM TestResult
WHERE TestResult.SomeField = 4
union all
SELECT SomeField,OtherField
FROM TestResult
WHERE TestResult.SomeField = 2
union all
...
I'd trust the former method more, and it would probably perform much better.
Decode function comes handy in this case instead of case expressions:
SELECT SomeField,OtherField
FROM TestResult
WHERE TestResult.SomeField IN (45,2,445,12,789)
ORDER BY DECODE(SomeField, 45,1, 2,2, 445,3, 12,4, 789,5)
Note that value,position pairs (e.g. 445,3) are kept together for readability reasons.
Try this:
SELECT T.SomeField,T.OtherField
FROM TestResult T
JOIN
(
SELECT 1 as Id, 45 as Val FROM dual UNION ALL
SELECT 2, 2 FROM dual UNION ALL
SELECT 3, 445 FROM dual UNION ALL
SELECT 4, 12 FROM dual UNION ALL
SELECT 5, 789 FROM dual
) I
ON T.SomeField = I.Val
ORDER BY I.Id
There is an alternative that uses string functions:
with const as (select ',45,2,445,12,789,' as vals)
select tr.*
from TestResult tr cross join const
where instr(const.vals, ','||cast(tr.somefield as varchar(255))||',') > 0
order by instr(const.vals, ','||cast(tr.somefield as varchar(255))||',')
I offer this because you might find it easier to maintain a string of values rather than an intermediate table.
I was able to do this in my application using (using SQL Server 2016)
select ItemID, iName
from Items
where ItemID in (13,11,12,1)
order by CHARINDEX(' ' + Convert("varchar",ItemID) + ' ',' 13 , 11 , 12 , 1 ')
I used a code-side regex to replace \b (word boundary) with a space. Something like...
var mylist = "13,11,12,1";
var spacedlist = replace(mylist,/\b/," ");
Importantly, because I can in my scenario, I cache the result until the next time the related items are updated, so that the query is only run at item creation/modification, rather than with each item viewing, helping to minimize any performance hit.
Pass the values in via a collection (SYS.ODCINUMBERLIST is an example of a built-in collection) and then order the rows by the collection's order:
SELECT t.SomeField,
t.OtherField
FROM TestResult t
INNER JOIN (
SELECT ROWNUM AS rn,
COLUMN_VALUE AS value
FROM TABLE(SYS.ODCINUMBERLIST(45,2,445,12,789))
) i
ON t.somefield = i.value
ORDER BY rn
Then, for the sample data:
CREATE TABLE TestResult ( somefield, otherfield ) AS
SELECT 2, 'A' FROM DUAL UNION ALL
SELECT 5, 'B' FROM DUAL UNION ALL
SELECT 12, 'C' FROM DUAL UNION ALL
SELECT 37, 'D' FROM DUAL UNION ALL
SELECT 45, 'E' FROM DUAL UNION ALL
SELECT 100, 'F' FROM DUAL UNION ALL
SELECT 445, 'G' FROM DUAL UNION ALL
SELECT 789, 'H' FROM DUAL UNION ALL
SELECT 999, 'I' FROM DUAL;
The output is:
SOMEFIELD
OTHERFIELD
45
E
2
A
445
G
12
C
789
H
fiddle