I need to convert JSON into data table (key value columns) in Oracle 12c v12.1.0.2
So for eg: there is a JSON string like {"ID": 10, "Description": "TestJSON", "status":"New"}
I need this converted to :
Column1 Column2
------------------------------------
ID 10
Description TestJSON
status New
Now my JSON string could change the number of attributes and hence I require to keep the conversion dynamic.
Any help would be appreciated.
Thanks!
You can implement it using the hierarchy query and REGEXP as follows:
SQL> with dataa(d) as
2 (select '["ID": 10, "Description": "TestJSON", "status":"New"]' from dual)
3 --
4 -- Your query starts from here
5 SELECT TRIM('"' FROM REGEXP_SUBSTR(STR,'[^:]+',1,1)) AS COL1,
6 TRIM('"' FROM TRIM(REGEXP_SUBSTR(STR,'[^:]+',1,2))) AS COL2
7 FROM
8 (SELECT t.d, trim(REGEXP_SUBSTR(trim(']' from trim('[' from T.D)), '[^,]+', 1, COLUMN_VALUE)) as str
9 FROM DATAA T
10 CROSS JOIN TABLE ( CAST(MULTISET(
11 SELECT LEVEL FROM DUAL CONNECT BY
12 LEVEL <= LENGTH(REGEXP_REPLACE(T.D, '[^,]+')) + 1
13 ) AS SYS.ODCINUMBERLIST) ) LEVELS);
COL1 COL2
--------------- --------------------
ID 10
Description TestJSON
status New
SQL>
Related
I have a table with data in below format
COURSE
[]
["12345"]
["12345","7890"
I want to extract the data between [] but without "
So, my output would be in below format
COURSE
12345
12345, 7890
I tried the below code which works fine for first 3 rows
select REGEXP_SUBSTR (COURSE,
'"([^"]+)"',
1,
1,
NULL,
1) from TEST;
But 4th row only results in 12345.
Why not simple translate?
SQL> with test (course) as
2 (select '[]' from dual union
3 select null from dual union
4 select '["12345"]' from dual union
5 select '["12345","7890"]' from dual
6 )
7 select course,
8 translate(course, 'a[]"', 'a') result
9 from test;
COURSE RESULT
---------------- -----------------------------------------
["12345","7890"] 12345,7890
["12345"] 12345
[]
SQL>
In Excel When I sort the texts in ascending order, results shows as below. Text with the underscore character precedes the others. And in Excel cell, when I type in ="_" < "A", then "True" shows as expected.
C10_
C10A
C20_
C20A
But, In Oracle, when I sort in ascending order, results shows as below.
(I guess, Oracle treats '_' < 'A' False)
C10A
C10_
C20A
C20_
How can I make Oracle sort the list exactly as Excel does? I have changed ASC to DESC, but the result was not what I expect.
My sorting code is as below,
WITH DATAA AS (
SELECT *
FROM
(
SELECT 'C10_'rr FROM DUAL
UNION
SELECT 'C10A' rr FROM DUAL
UNION
SELECT 'C20_' rr FROM DUAL
UNION
SELECT 'C20A' rr FROM DUAL
)
)
SELECT *
FROM DATAA
ORDER BY rr ASC;
You can achieve this by altering the sorting method using NLS_SORT as following:
According to ORACLE Documentation:
NLS_SORT specifies the type of sort for character data. It overrides
the default value that is derived from NLS_LANGUAGE.
NLS_SORT contains either of the following values:
NLS_SORT = BINARY | sort_name
BINARY specifies a binary sort. sort_name specifies a linguistic sort
sequence.
Here is how you can achieve the result.
SQL> -- Your original query
SQL> --
SQL> WITH DATAA AS (
2 SELECT *
3 FROM
4 (
5 SELECT 'C10_'rr FROM DUAL UNION
6 SELECT 'C10A' rr FROM DUAL UNION
7 SELECT 'C20_' rr FROM DUAL UNION
8 SELECT 'C20A' rr FROM DUAL )
9 )
10 SELECT *
11 FROM DATAA
12 ORDER BY rr ASC;
RR
----
C10A
C10_
C20A
C20_
--
SQL> -- Now altering the sorting method
SQL> --
SQL> --
SQL> alter session set NLS_SORT = German;
Session altered.
SQL> --
SQL> --
SQL> -- Now see the result
SQL> --
SQL> --
SQL> WITH DATAA AS (
2 SELECT *
3 FROM
4 (
5 SELECT 'C10_'rr FROM DUAL UNION
6 SELECT 'C10A' rr FROM DUAL UNION
7 SELECT 'C20_' rr FROM DUAL UNION
8 SELECT 'C20A' rr FROM DUAL )
9 )
10 SELECT *
11 FROM DATAA
12 ORDER BY rr ASC;
RR
----
C10_
C10A
C20_
C20A
SQL>
Cheers!!
I want to select the data from a Oracle table, whereas the table columns contains the data as , [ex : key,value] separated values; so here I want to select the second split i.e, value
table column data as below :
column_data
++++++++++++++
asper,worse
tincher,good
golder
null -- null values need to eliminate while selection
www,ewe
from the above data, desired output like below:
column_data
+++++++++++++
worse
good
golder
ewe
Please help me with the query
According to data you provided, here are two options:
result1: regular expressions one (get the 2nd word if it exists; otherwise, get the 1st one)
result2: SUBSTR + INSTR combination
SQL> with test (col) as
2 (select 'asper,worse' from dual union all
3 select 'tincher,good' from dual union all
4 select 'golder' from dual union all
5 select null from dual union all
6 select 'www,ewe' from dual
7 )
8 select col,
9 nvl(regexp_substr(col, '\w+', 1, 2), regexp_substr(col, '\w+', 1,1 )) result1,
10 --
11 nvl(substr(col, instr(col, ',') + 1), col) result2
12 from test
13 where col is not null;
COL RESULT1 RESULT2
------------ -------------------- --------------------
asper,worse worse worse
tincher,good good good
golder golder golder
www,ewe ewe ewe
SQL>
I have a table called TVL_DETAIL that contains column TVL_CD_LIST. Column TVL_CD_LIST contains three records:
TVL_CD_LIST:
M1180_Z6827
K5900_Z6828
I2510
I've used the following code in an attempt to return the values only(so excluding the underscore):
SELECT
TVL_CD_LIST
FROM TVL_DETAIL
WHERE TVL_CD_LIST IN (SELECT regexp_substr(TVL_CD_LIST,'[^_]+', 1, level) FROM DUAL
CONNECT BY regexp_substr(TVL_CD_LIST,'[^_]+', 1, level) IS NOT NULL)
What I was expecting to see returned in separate rows was:
M1180
Z6827
K5900
Z6828
I2510
But it only returns I2510(which is the original value that doesn't contain an underscore).
What am I doing wrong? Any help is appreciated. Thanks!
To answer your question, you are querying for the list where it matches a sub-element and that will only happen where the list is comprised of one element. What you really wanted to select are the sub-elements themselves.
Note: Explanation of why parsing strings using the regex form '[^_]+' is bad here: https://stackoverflow.com/a/31464699/2543416
You want to parse the list, selecting the elements:
SQL> with TVL_DETAIL(TVL_CD_LIST) as (
select 'M1180_Z6827' from dual union
select 'K5900_Z6828' from dual union
select 'I2510' from dual
)
SELECT distinct regexp_substr(TVL_CD_LIST, '(.*?)(_|$)', 1, level, NULL, 1) element
FROM TVL_DETAIL
CONNECT BY level <= LENGTH(regexp_replace(TVL_CD_LIST, '[^_]', '')) + 1;
-- 11g CONNECT BY level <= regexp_count(TVL_CD_LIST, '_') + 1;
ELEMENT
-----------
Z6827
K5900
M1180
I2510
Z6828
SQL>
And this is cool if you want to track by row and element within row:
SQL> with TVL_DETAIL(row_nbr, TVL_CD_LIST) as (
select 1, 'M1180_Z6827' from dual union
select 2, 'K5900_Z6828' from dual union
select 3, 'I2510' from dual
)
SELECT row_nbr, column_value substring_nbr,
regexp_substr(TVL_CD_LIST, '(.*?)(_|$)', 1, column_value, NULL, 1) element
FROM TVL_DETAIL,
TABLE(
CAST(
MULTISET(SELECT LEVEL
FROM dual
CONNECT BY level <= LENGTH(regexp_replace(TVL_CD_LIST, '[^_]', '')) + 1
-- 11g CONNECT BY LEVEL <= REGEXP_COUNT(TVL_CD_LIST, '_')+1
) AS sys.OdciNumberList
)
)
order by row_nbr, substring_nbr;
ROW_NBR SUBSTRING_NBR ELEMENT
---------- ------------- -----------
1 1 M1180
1 2 Z6827
2 1 K5900
2 2 Z6828
3 1 I2510
SQL>
EDIT: Oops, edited to work with 10g as REGEXP_COUNT is not available until 11g.
The query you have used creates the list but you are comparing the list of record with column it self using the in clause, as such M1180 or Z6827 cannot be equal to M1180_Z6827 and so for K5900_Z6828. I2510 has only one value so it gets matched.
You can use below query if your requirement is exactly what you have mentioned in your desired output.
SQL> WITH tvl_detail AS
2 (SELECT 'M1180_Z6827' tvl_cd_list FROM dual
3 UNION ALL
4 SELECT 'K5900_Z6828' FROM dual
5 UNION ALL
6 SELECT 'I2510' FROM dual)
7 ---------------------------
8 --- End of data preparation
9 ---------------------------
10 SELECT regexp_substr(tvl_cd_list, '[^_]+', 1, LEVEL) AS tvl_cd_list
11 FROM tvl_detail
12 CONNECT BY regexp_substr(tvl_cd_list, '[^_]+', 1, LEVEL) IS NOT NULL
13 AND PRIOR tvl_cd_list = tvl_cd_list
14 AND PRIOR sys_guid() IS NOT NULL;
OUTPUT:
TVL_CD_LIST
--------------------------------------------
I2510
K5900
Z6828
M1180
Z6827
I wanted to see what some suggested approaches would be to validate a field that is stored as a CSV against a table containing appropriate values. Althought it would be desired, it is NOT an option to split the CSV list into another related table. In the example data below I would be trying to capture the code 99 for widget A.
Below is an example data representation.
Table: Widgets
WidgetName WidgetCodeList
A 1, 2, 3
B 1
C 2, 3
D 99
Table: WidgetCodes
WidgetCode
1
2
3
An earlier approach was to query the CSV column as rows using various string manipulations and CONNECT_BY_LEVEL however the performance was not acceptible.
You could try a pipelined function (here with a lateral join):
SQL> WITH widgets AS (
2 SELECT 'A' WidgetName, '1, 2, 3' WidgetCodeList FROM dual
3 UNION ALL SELECT 'B', '1' FROM DUAL
4 UNION ALL SELECT 'C', '2, 3' FROM DUAL
5 UNION ALL SELECT 'D', '99' FROM DUAL
6 ), widgetcodes AS (
7 SELECT ROWNUM widgetcode from dual CONNECT BY LEVEL <= 3
8 )
9 SELECT w.widgetname,
10 to_number(s.column_value) missing_widget
11 FROM widgets w
12 CROSS JOIN TABLE(demo_pkg.string_to_tab(w.WidgetCodeList)) s
13 WHERE NOT EXISTS (SELECT NULL
14 FROM widgetcodes ws
15 WHERE ws.widgetcode = to_number(s.column_value));
WIDGETNAME MISSING_WIDGET
---------- --------------
D 99
See this other SO for an example of a pipelined function that converts a character string to a table.
In PL/SQL, you could make use of the Apex utility for converting a delimited string to a PL/SQL collection like this:
procedure validate_csv (p_csv varchar2)
is
v_array apex_application_global.vc_arr2;
v_dummy varchar2(1);
begin
v_array := apex_util.string_to_table(p_csv, ', ');
for i in 1..v_array.count
loop
begin
select null
into v_dummy
from widgetcodes
where widgetcode = v_array(i);
exception
when no_data_found then
raise_application_error('Invalid widget code: '||v_array(i));
end;
end loop;
end;