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I have a table in which with repeating id.
The goal is (to make a select) to get all the results of the repeating id to pour against each id in Json format as id it's not in Json
id,yyyy,name
1,2010,a
1,2011,b
2,2010,a
3,2010,c
3,2011,a
4,2011,v
Desired result
id, column(json)
1 {"2010":"a","2011","b"}
2 {"2010":"a","2010":"c"}
3 {"2010":"c","2011":"a"}
4 {"2011":"v"}
with data(id, y, name) as (
select 1,2010,'a' from dual union all
select 1,2011,'b' from dual union all
select 2,2010,'a' from dual union all
select 3,2010,'c' from dual union all
select 3,2011,'a' from dual union all
select 4,2011,'v' from dual -- union all
)
select id, json_objectagg(
key to_char(y) value name) as obj
from data
group by id
;
1 {"2010":"a","2011":"b"}
2 {"2010":"a"}
3 {"2010":"c","2011":"a"}
4 {"2011":"v"}
I am working with table data that contains strings with decimal and back-slash like below:
info
1/2.2.2
2/1.1.1
3/1.1.11
I need to use a regular expression to replace the data like below:
info
1/2.2
2/1.1
3/1.1
Don't use a (slow) regular expression, use simple (faster) string functions instead:
SELECT info,
CASE
WHEN INSTR(info, '.', 1, 2) > 0
THEN SUBSTR(info, 1, INSTR(info, '.', 1, 2) - 1)
ELSE info
END AS part
FROM table_name;
Which, for the sample data:
CREATE TABLE table_name (info) AS
SELECT '1/2.2.2' FROM DUAL UNION ALL
SELECT '2/1.1.1' FROM DUAL UNION ALL
SELECT '3/1.1.11' FROM DUAL UNION ALL
SELECT '3/1.1' FROM DUAL;
Outputs:
INFO
PART
1/2.2.2
1/2.2
2/1.1.1
2/1.1
3/1.1.11
3/1.1
3/1.1
3/1.1
If you want to update the table then:
UPDATE table_name
SET info = SUBSTR(info, 1, INSTR(info, '.', 1, 2) - 1)
WHERE INSTR(info, '.', 1, 2) > 0
fiddle
For the sake of argument, here's a solution using REGEXP_SUBSTR(). REGEXP_SUBSTR() returns NULL if the pattern is not found. Thanks to MT0 for the CTE so I didn't have to type it up :-)
WITH table_name(ID, info) AS (
SELECT 1, '1/2.2.2' FROM DUAL UNION ALL
SELECT 2, '2/1.1.1' FROM DUAL UNION ALL
SELECT 3, '3/1.1.11' FROM DUAL UNION ALL
SELECT 4, '3/1.1' FROM DUAL UNION ALL
SELECT 5, '4/4' FROM DUAL)
SELECT ID, REGEXP_SUBSTR(info, '\d/\d\.\d') DATA
from table_name;
ID DATA
---------- --------
1 1/2.2
2 2/1.1
3 3/1.1
4 3/1.1
5
5 rows selected.
So, there are 2 tables
Table1 (Contains all articles,center,date 00000)
Tabla2 (Contains articles handwritten (that are also in Table1),center, date)
We have a procedure that every day compares Table1 and Table2 articles and center, and if they match, an update changes th Table1 date for that article and center.
Now, we also want to add something, we want that in case center is ' ' (empty) on Tabla2, it updates every center that has that article in Table1.
Here is the OracleSQL:
update Table1 r
set date1= (SELECT max(date2) FROM Tabla2 t
where t.articulo = r.articulo
and t.center = to_char(center) //It gets the center from a select behind
and t.date2 >= to_char(sysdate,'yyyymmdd')
group by t.center);
We want both cases to work
If center has a real center like 20, it only updates center 20.
If center has a empty '' then it updates every center with that article.
You can use:
UPDATE Table1 r
SET date1 = ( SELECT MAX(date2)
KEEP (DENSE_RANK FIRST ORDER BY t.center NULLS LAST)
FROM Tabla2 t
WHERE t.articulo = r.articulo
AND (t.center = r.center OR t.center IS NULL)
AND t.date2 >= TRUNC(sysdate)
);
Note: KEEP (DENSE_RANK LAST... is used to prefer dates from a row with a non-NULL center over rows with a NULL center.
Which, if you have the sample data:
CREATE TABLE table1 (articulo, center, date1) AS
SELECT 1, 1, CAST(NULL AS DATE) FROM DUAL UNION ALL
SELECT 2, 2, NULL FROM DUAL UNION ALL
SELECT 3, 3, NULL FROM DUAL UNION ALL
SELECT 4, 4, NULL FROM DUAL;
CREATE TABLE tabla2 (articulo, center, date2) AS
SELECT 1, 1, DATE '2023-05-19' FROM DUAL UNION ALL
SELECT 2, 2, DATE '2023-01-01' FROM DUAL UNION ALL
SELECT 2, 2, DATE '2023-05-19' FROM DUAL UNION ALL
SELECT 3, 3, DATE '2023-01-01' FROM DUAL UNION ALL
SELECT 3, NULL, DATE '2023-05-19' FROM DUAL UNION ALL
SELECT 4, NULL, DATE '2023-01-01' FROM DUAL UNION ALL
SELECT 4, NULL, DATE '2023-05-19' FROM DUAL;
Then, after the update Table1 contains:
ARTICULO
CENTER
DATE1
1
1
2023-05-19 00:00:00
2
2
2023-05-19 00:00:00
3
3
2023-01-01 00:00:00
4
4
2023-05-19 00:00:00
db<>fiddle here
I would use something like this:
and t.center = nvl(to_char(center),t.center)
If the center is populated, it will use that value. If center is null, the nvl will instead result in the value of t.center. Basically resulting in t.center=t.center (which again means always true).
In the Oracle database, I have string values (VARCHAR2) like 1,4,7,8. The number represents as 1=car, 2= bus, 3=BB, 4=SB, 5=Ba, 6=PA, 7=HB, and 8 =G
and want to convert the above-said example to "car,SB,HB,G" in my query results
I tried to use "Decode" but it does not work. Please advise how to make it works. Would appreciate.
Thanks`
Initially, I have used the following query:
Select Clientid as C#, vehicletypeExclusions as vehicle from
clients
The sample of outcomes are:
C# Vehicle
20 1,19,20,23,24,7,5
22 1,19,20,23,24,7,5
I also tried the following that gives me the null value of vehicles:
Select Clientid as C#, Decode (VEHICLETYPEEXCLUSIONS, '1', 'car',
'3','bus', '5','ba' ,'7','HB', '8','G'
, '9','LED1102', '10','LED1104', '13','LED8-2',
'14','Flip4-12', '17','StAT1003', '19','Taxi-Min', '20','Tax_Sed',
'21','Sup-veh' , '22','T-DATS', '23','T-Mini',
'24','T-WAM') as vehicle_Ex from clients >
Here's one option. Read comments within code. Sample data in lines #1 - 13; query begins at line #14.
SQL> with
2 expl (id, name) as
3 (select 1, 'car' from dual union all
4 select 2, 'bus' from dual union all
5 select 3, 'BB' from dual union all
6 select 4, 'SB' from dual union all
7 select 5, 'Ba' from dual union all
8 select 6, 'PA' from dual union all
9 select 7, 'HB' from dual union all
10 select 8, 'G' from dual
11 ),
12 temp (col) as
13 (select '1,4,7,8' from dual),
14 -- split COL to rows
15 spl as
16 (select regexp_substr(col, '[^,]+', 1, level) val,
17 level lvl
18 from temp
19 connect by level <= regexp_count(col, ',') + 1
20 )
21 -- join SPL with EXPL; aggregate the result
22 select listagg(e.name, ',') within group (order by s.lvl) result
23 from expl e join spl s on s.val = e.id;
RESULT
--------------------------------------------------------------------------------
car,SB,HB,G
SQL>
Using the function f_subst from https://stackoverflow.com/a/68537479/429100 :
create or replace
function f_subst(str varchar2, template varchar2, subst sys.odcivarchar2list) return varchar2
as
res varchar2(32767):=str;
begin
for i in 1..subst.count loop
res:=replace(res, replace(template,'%d',i), subst(i));
end loop;
return res;
end;
/
I've replaced ora_name_list_t (nested table) with sys.odcivarchar2list (varray) to make this example easier, but I would suggest to create your own collection for example create type varchar2_table as table of varchar2(4000);
Example:
select
f_subst(
'1,4,7,8'
,'%d'
,sys.odcivarchar2list('car','bus','BB','SB','Ba','PA','HB','G')
) s
from dual;
S
----------------------------------------
car,SB,HB,G
Assume you have a lookup table (associating the numeric codes with descriptions) and a table of input strings, which I called sample_inputs in my tests, as shown below:
create table lookup (code, descr) as
select 1, 'car' from dual union all
select 2, 'bus' from dual union all
select 3, 'BB' from dual union all
select 4, 'SB' from dual union all
select 5, 'Ba' from dual union all
select 6, 'PA' from dual union all
select 7, 'HB' from dual union all
select 8, 'G' from dual
;
create table sample_inputs (str) as
select '1,4,7,8' from dual union all
select null from dual union all
select '3' from dual union all
select '5,5,5' from dual union all
select '6,2,8' from dual
;
One strategy for solving your problem is to split the input - slightly modified to make it a JSON array, so that we can use json_table to split it - then join to the lookup table and re-aggregate.
select s.str, l.descr_list
from sample_inputs s cross join lateral
( select listagg(descr, ',') within group (order by ord) as descr_list
from json_table( '[' || str || ']', '$[*]'
columns code number path '$', ord for ordinality)
join lookup l using (code)
) l
;
STR DESCR_LIST
------- ------------------------------
1,4,7,8 car,SB,HB,G
3 BB
5,5,5 Ba,Ba,Ba
6,2,8 PA,bus,G
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