I have table:
ID |Values
-----+--------------------------------
1 |AB,AD
2 |AG, ... ,BD
3 |AV
How can i transform it to:
ID |Value
-----+------
1 |AB
1 |AD
2 |AG
... |...
2 |BD
3 |AV
Using the built-in XML functions, you can do it like that:
with sample_data as
(
select 1 id, 'AB,AD' vals from dual union all
select 2, 'AG,AK,AJ,BA,BD' from dual union all
select 3, 'AV' from dual
)
select id, cast(t.column_value.extract('//text()') as varchar2(10)) val
from sample_data,
table( xmlsequence( xmltype(
'<x><x>' || replace(vals, ',', '</x><x>') || '</x></x>'
).extract('//x/*'))) t;
Result:
ID VAL
--- -----
1 AB
1 AD
2 AG
2 AK
2 AJ
2 BA
2 BD
3 AV
Using recursive common table expression, the same query looks like this:
with sample_data as
(
select 1 id, 'AB,AD' vals from dual union all
select 2, 'AG,AK,AJ,BA,BD' from dual union all
select 3, 'AV' from dual
),
split_first(id, val, rem) as
(
select id,
coalesce(substr(vals, 1, instr(vals, ',') - 1), vals) val,
case when instr(vals, ',') > 0 then substr(vals, instr(vals, ',') + 1) end rem
from sample_data
union all
select id,
coalesce(substr(rem, 1, instr(rem, ',') - 1), rem) val,
case when instr(rem, ',') > 0 then substr(rem, instr(rem, ',') + 1) end rem
from split_first
where rem is not null
)
select id, val from split_first
order by id;
Or a slightly different approach:
with sample_data as
(
select 1 id, 'AB,AD' vals from dual union all
select 2, 'AG,AK,AJ,BA,BD' from dual union all
select 3, 'AV' from dual
),
pos(id, seq, vals, sta, stp) as
(
select id, 1, vals, 1, instr(vals, ',') from sample_data
union all
select id, seq + 1, vals, stp + 1, instr(vals, ',', stp + 1) from pos
where stp > 0
)
select id, substr(vals, sta, case when stp > 0 then stp - sta else length(vals) end) from pos
order by id, seq;
Related
I have this query that returns the data below it
select LISTAGG(d.DOCUMENT_TYPE_CD, ',') WITHIN GROUP (ORDER BY D.DOCUMENT_TYPE_CD) as value
from test_table d;
VALUE
---------
CI,ECI,POA
now I'm trying to add a condition whenever 'ECI' value is present, it should exclude 'CI' in the result like this one below
VALUE
---------
ECI,POA
I tried using case statement in where condition it prompted an error
select LISTAGG(d.DOCUMENT_TYPE_CD, ',')
WITHIN GROUP (ORDER BY D.DOCUMENT_TYPE_CD) as value
from test_table d
where CASE d.DOCUMENT_TYPE_CD
WHEN 'ECI' THEN d.DOCUMENT_TYPE_CD <> 'CI'
END;
ORA-00905: missing keyword
00905. 00000 - "missing keyword"
*Cause:
*Action:
Error at Line: 7 Column: 36
is there any other way I could resolve this?
See if this helps; read comments within code.
SQL> with
2 test (id, document_type_cd) as
3 -- sample data
4 (select 1, 'ECI' from dual union all
5 select 1, 'CI' from dual union all
6 select 1, 'POA' from dual union all
7 --
8 select 2, 'CI' from dual union all
9 select 2, 'POA' from dual union all
10 --
11 select 3, 'XYZ' from dual union all
12 select 3, 'ABC' from dual
13 ),
14 temp as
15 -- see whether CI and ECI exist per each ID
16 (select id,
17 sum(case when document_type_cd = 'CI' then 1 else 0 end) sum_ci,
18 sum(case when document_type_cd = 'ECI' then 1 else 0 end) sum_eci
19 from test
20 group by id
21 ),
22 excl as
23 -- exclude CI rows if ECI exist for that ID
24 (select a.id,
25 a.document_type_cd
26 from test a join temp b on a.id = b.id
27 where a.document_type_cd <> case when b.sum_ci > 0 and b.sum_eci > 0 then 'CI'
28 else '-1'
29 end
30 )
31 -- finally:
32 select e.id,
33 listagg(e.document_type_cd, ',') within group (order by e.document_type_cd) result
34 from excl e
35 group by e.id;
ID RESULT
---------- --------------------
1 ECI,POA
2 CI,POA
3 ABC,XYZ
SQL>
Something like this:
select LISTAGG(d.DOCUMENT_TYPE_CD, ',')
WITHIN GROUP (ORDER BY D.DOCUMENT_TYPE_CD) as value
from test_table d,
(select sum (case when DOCUMENT_TYPE_CD = 'CI' then 1 else 0 end) C
from test_table) A
where d.DOCUMENT_TYPE_CD <> case when A.c > 0 then 'CI' when A.c = 0 then ' ' end;
DEMO
You may identify the presence of both the values with two conditional aggregations in the same group by and then replace CI inside the result of listagg in one pass.
with a(id, cd) as (
select 1, 'ABC' from dual union all
select 1, 'ECI' from dual union all
select 1, 'CI' from dual union all
select 1, 'POA' from dual union all
select 2, 'XYZ' from dual union all
select 2, 'ECI' from dual union all
select 2, 'CI' from dual union all
select 2, 'POA' from dual union all
select 3, 'CI' from dual union all
select 3, 'POA' from dual union all
select 4, 'ABC' from dual union all
select 4, 'DEF' from dual
)
select
id,
ltrim(
/*Added comma in case CI will be at the beginning*/
replace(
',' || listagg(cd, ',') within group (order by cd asc),
decode(
/*If both are present, then replace CI. If not, then do not replace anything*/
max(decode(cd, 'CI', 1))*max(decode(cd, 'ECI', 1)),
1,
',CI,'
),
','
),
','
) as res
from a
group by id
ID | RES
-: | :----------
1 | ABC,ECI,POA
2 | ECI,POA,XYZ
3 | CI,POA
4 | ABC,DEF
db<>fiddle here
Instead of using GROUP BY, you can also use windowing (aka analytic) functions to check the presence of ECI per group (test data shamelessly stolen from #littlefoot):
with
test (id, document_type_cd) as
-- sample data
(select 1, 'ECI' from dual union all
select 1, 'CI' from dual union all
select 1, 'POA' from dual union all
--
select 2, 'CI' from dual union all
select 2, 'POA' from dual union all
--
select 3, 'XYZ' from dual union all
select 3, 'ABC' from dual
),
temp as
(select id,
document_type_cd,
sum(case when document_type_cd = 'ECI' then 1 else 0 end) over (partition by id) as sum_eci
from test
)
select a.id,
listagg(a.document_type_cd, ',') within group (order by a.document_type_cd) result
from temp a
where a.document_type_cd != 'CI' or sum_eci = 0
group by a.id;
I've two integer columns and need to display the rows with consecutive one's in the NUM column.
Sample data:
CREATE TABLE table_name ( ID, NUM ) AS
SELECT 1, 1 FROM DUAL UNION ALL
SELECT 2, 1 FROM DUAL UNION ALL
SELECT 3, 1 FROM DUAL UNION ALL
SELECT 4, 2 FROM DUAL UNION ALL
SELECT 5, 1 FROM DUAL UNION ALL
SELECT 6, 2 FROM DUAL UNION ALL
SELECT 7, 2 FROM DUAL;
Expected Output:
ID NUM
-- ---
1 1
2 1
3 1
I have tried using self-joins and achieved the result:
WITH TAB (ID, NUM) AS
(
SELECT 1, 1 FROM DUAL UNION ALL
SELECT 2, 1 FROM DUAL UNION ALL
SELECT 3, 1 FROM DUAL UNION ALL
SELECT 4, 2 FROM DUAL UNION ALL
SELECT 5, 1 FROM DUAL UNION ALL
SELECT 6, 2 FROM DUAL UNION ALL
SELECT 7, 2 FROM DUAL
)
SELECT DISTINCT
T.ID,
T.NUM
FROM
TAB T
JOIN (
SELECT
T1.ID ID1,
T2.ID ID2,
T1.NUM,
COUNT(1) OVER(
PARTITION BY T1.NUM
) RN
FROM
TAB T1
JOIN TAB T2 ON ( T1.NUM = T2.NUM
AND T1.ID = T2.ID + 1 )
) T_IN ON ( ( T.ID = T_IN.ID1
OR T.ID = T_IN.ID2 )
AND T.NUM = T_IN.NUM
AND RN >= 2 ) -- THIS CONDITION IS TO RESTRICT CONSECUTIVES LESS THAN 3
ORDER BY
1
output:
db<>fiddle demo
Use analytic functions LAG or LEAD:
Oracle Setup:
CREATE TABLE table_name ( ID, NUM ) AS
SELECT 1, 1 FROM DUAL UNION ALL
SELECT 2, 1 FROM DUAL UNION ALL
SELECT 3, 1 FROM DUAL UNION ALL
SELECT 4, 2 FROM DUAL UNION ALL
SELECT 5, 1 FROM DUAL UNION ALL
SELECT 6, 2 FROM DUAL UNION ALL
SELECT 7, 2 FROM DUAL;
Query:
SELECT id,num
FROM (
SELECT id,
num,
LAG( num ) OVER ( ORDER BY id ) AS prev_num,
LEAD( num ) OVER ( ORDER BY id ) AS next_num
FROM table_name
)
WHERE num = 1
AND ( num = prev_num
OR num = next_num )
Output:
ID | NUM
-: | --:
1 | 1
2 | 1
3 | 1
db<>fiddle here
I have a string an string "ADBDkK" and I need to sort it as "ABDDKk", like Arrays.sort() in java. I know it can be done by using PL/SQL but I need of this in Oracle SQL statement.
Input:
ADBDkK
ZXYABC
Output:
ABDDKk
ABCXYZ
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE test ( value ) AS
SELECT 'ADBDkK' FROM DUAL UNION ALL
SELECT 'ZXYABC' FROM DUAL;
Query 1:
WITH chars ( id, value, ch, lvl ) AS (
SELECT ROWNUM, value, SUBSTR( value, 1, 1 ), 1
FROM test
UNION ALL
SELECT id, value, SUBSTR( value, lvl+1, 1 ), lvl+1
FROM chars
WHERE lvl < LENGTH( value )
)
SELECT LISTAGG( ch ) WITHIN GROUP ( ORDER BY ch ) AS value
FROM chars
GROUP BY id
ORDER BY id
Results:
| VALUE |
|--------|
| ABDDKk |
| ABCXYZ |
Query 2:
SELECT LISTAGG( COLUMN_VALUE )
WITHIN GROUP ( ORDER BY COLUMN_VALUE ) AS value
FROM (
SELECT value,
ROWNUM AS id
FROM test
) t
CROSS JOIN
TABLE(
CAST(
MULTISET(
SELECT SUBSTR( t.value, LEVEL, 1 )
FROM DUAL
CONNECT BY LEVEL <= LENGTH( t.value )
)
AS SYS.ODCIVARCHAR2LIST
)
) c
GROUP BY t.id
ORDER BY t.id
Results:
| VALUE |
|--------|
| ABDDKk |
| ABCXYZ |
For a single string:
select listagg(regexp_substr('ADBDkK', '\w', 1 ,level),'')
within group (order by 1) from dual
connect by regexp_substr('ADBDkK', '\w', 1 ,level) is not null;
A slightly different way using a function:
CREATE OR REPLACE FUNCTION sort_string(my_string IN VARCHAR2)
RETURN VARCHAR2 IS
ret_string VARCHAR2(4000);
BEGIN
SELECT LISTAGG(regexp_substr(my_string, '\w', 1, level), '') WITHIN
GROUP(
ORDER BY 1)
INTO ret_string
FROM dual
CONNECT BY regexp_substr(my_string, '\w', 1, level) IS NOT NULL;
RETURN ret_string;
END;
Then from sqlplus:
SQL> select sort_string('ADBDkK') as RESULT from dual;
RESULT
------
ABDDKk
SQL> select sort_string('ZXYABC') as RESULT from dual;
RESULT
------
ABCXYZ
with t1 as (
select 'London Singapur' tmp from dual union all
select 'Singapur China' tmp from dual union all
select 'USA JAPAN ' tmp from dual union all
select 'JAPAN USA' tmp from dual union all
select 'Singapur London' tmp from dual
),
dst as ( select ROWNUM rwn,tmp,REGEXP_COUNT(tmp,'[^[:space:]]+') cnt_array from t1 ),
rc(id, cnt_id, tmp, CNT_ARRAY, SL) AS (
SELECT rwn id,1 cnt_id,tmp, CNT_ARRAY, regexp_substr(tmp,'[^[:space:]]+',1,1) sl FROM dst
UNION ALL
SELECT rc.id, rc.cnt_id+1 cnt_id, rc.tmp, rc.CNT_ARRAY, regexp_substr(rc.tmp,'[^[:space:]]+',1,rc.cnt_id+1) sl
FROM dst tr, rc
WHERE tr.rwn = rc.id and rc.cnt_id+1<=tr.CNT_ARRAY
),
srt as (select rc.*,row_number() over (partition by id order by id) nb,
listagg(sl,' ') WITHIN GROUP (ORDER BY sl) over(partition by id) fiel_srt
from rc)
select * from srt where nb=1
I need a graceful way to select the max value from a field holding a comma delimited list.
Expected Values:
List_1 | Last
------ | ------
A,B,C | C
B,D,C | D
I'm using the following query and I'm not getting what's expected.
select
list_1,
(
select max(values) WITHIN GROUP (order by 1)
from (
select
regexp_substr(list_1,'[^,]+', 1, level) as values
from dual
connect by regexp_substr(list_1, '[^,]+', 1, level) is not null)
) as last
from my_table
Anyone have any ideas to fix my query?
with
test_data ( id, list_1 ) as (
select 101, 'A,B,C' from dual union all
select 102, 'B,D,C' from dual union all
select 105, null from dual union all
select 122, 'A' from dual union all
select 140, 'A,B,B' from dual
)
-- end of simulated table (for testing purposes only, not part of the solution)
select id, list_1, max(token) as max_value
from ( select id, list_1,
regexp_substr(list_1, '([^,])(,|$)', 1, level, null, 1) as token
from test_data
connect by level <= 1 + regexp_count(list_1, ',')
and prior id = id
and prior sys_guid() is not null
)
group by id, list_1
order by id
;
ID LIST_1_ MAX_VAL
---- ------- -------
101 A,B,C C
102 B,D,C D
105
122 A A
140 A,B,B B
In Oracle 12.1 or higher, this can be re-written using the LATERAL clause:
select d.id, d.list_1, x.max_value
from test_data d,
lateral ( select max(regexp_substr(list_1, '([^,]*)(,|$)',
1, level, null, 1)) as max_value
from test_data x
where x.id = d.id
connect by level <= 1 + regexp_count(list_1, ',')
) x
order by d.id
;
This might be a simple but I need to apply the logic in other:
WITH t(col) AS (
SELECT 1 FROM dual
UNION SELECT 2 FROM dual
UNION SELECT 3 FROM dual
UNION SELECT 4 FROM dual
UNION SELECT 5 FROM dual
)
SELECT col , --- will works as usual
(SELECT col FROM t WHERE col = outer_q.col) new_col, --working as well
(
SELECT sum (latest_col)
from
(
SELECT col latest_col FROM t WHERE col = outer_q.col
UNION ALL
SELECT col FROM t WHERE col = outer_q.col
)
)newest_col -- need to get an output "4"
from t outer_q where col = 2;
An simple output like:
COL NEW_COL NEWEST_COL
---------- ---------- ----------
2 2 4
I just need to use the outer most value to the inner I used for the third column
EDITING-- sample with more data:
WITH
t(col) AS
( SELECT 1 FROM dual
UNION
SELECT 2 FROM dual
UNION
SELECT 3 FROM dual
UNION
SELECT 4 FROM dual
UNION
SELECT 5 FROM dual
),
t1(amount, col) AS
(SELECT 100 , 2 FROM dual
UNION
SELECT 200, 3 FROM dual
)
SELECT col,
(SELECT col FROM t WHERE col = outer_q.col
) new_col,
(SELECT SUM(x)
FROM
(SELECT col x FROM t
UNION ALL
SELECT amount x FROM t1
)
WHERE col = outer_q.col
) newest_col -- gives 315 as it takes whole `SUM`
FROM t outer_q
WHERE col = 2;
An output is expected like:
COL NEW_COL NEWEST_COL
---------- ---------- ----------
2 2 102
Thanks in advance for any help.
Well, you can if you refactor a but your query:
WITH t(col) AS (
SELECT 1 FROM dual
UNION SELECT 2 FROM dual
UNION SELECT 3 FROM dual
UNION SELECT 4 FROM dual
UNION SELECT 5 FROM dual
)
SELECT col,
(SELECT col FROM t WHERE col = outer_q.col) new_col,
(SELECT sum (latest_col)
from
(
SELECT col latest_col FROM t
UNION ALL
SELECT col FROM t
) x
where x.latest_col = outer_q.col
) newest_col -- need to get an output "4"
from t outer_q where col = 2;
This is possible here because outer_q is now in the where clause of the sub-query. It was used before in the sub-sub-query (the one with the UNION ALL), and this one was hiding it.
To try to make things clearer, now we have something like:
with t as (...)
select col,
(SELECT col FROM t WHERE col = outer_q.col) new_col,
(SELECT col FROM (Something more complex) WHERE ... = outer_q.col) new_col,
from t outer_q where col = 2;
So we now have the same level of "interiority".
EDIT: to answer the updated question, there is a little adaptation needed:
WITH t(col) AS
(
SELECT 1 FROM dual
UNION
SELECT 2 FROM dual
UNION
SELECT 3 FROM dual
UNION
SELECT 4 FROM dual
UNION
SELECT 5 FROM dual
),
t1(amount, col) AS
(
SELECT 100, 2 FROM dual
UNION
SELECT 200, 3 FROM dual
)
SELECT col,
(SELECT col FROM t WHERE col = outer_q.col) new_col,
(SELECT SUM(amount)
FROM
(SELECT col, col amount FROM t -- row is (1, 1), then (2, 2) etc
UNION ALL
SELECT col, amount FROM t1 -- row is (2, 100), then (3, 200) etc
)
WHERE col = outer_q.col
) newest_col -- gives 102 as it takes whole `SUM`
FROM t outer_q
WHERE col = 2;
The part to understand is in the innermost query: you want to sum both the column and the amount value, so you repeat the col value as if it was an amount.
Another way to obtain the same result (with more performance, I guess) would be to sum col and amount on the same row:
WITH t(col) AS
(
SELECT 1 FROM dual
UNION
SELECT 2 FROM dual
UNION
SELECT 3 FROM dual
UNION
SELECT 4 FROM dual
UNION
SELECT 5 FROM dual
),
t1(amount, col) AS
(
SELECT 100, 2 FROM dual
UNION
SELECT 200, 3 FROM dual
)
SELECT col,
(SELECT col FROM t WHERE col = outer_q.col) new_col,
(SELECT SUM(all_amount)
FROM
(SELECT col, col + amount all_amount FROM t1)
WHERE col = outer_q.col
) newest_col -- gives 315 as it takes whole `SUM`
FROM t outer_q
WHERE col = 2;
The inner query fails because you tried to push the outer_q.col reference two levels down. Correlated query goes only 1 level down
Reference: http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1853075500346799932