I have a string like below.
'comp' as "COMPUTER",'ms' as "MOUSE" ,'keybr' as "KEYBOARD",'MONT' as "MONITOR",
Is it possible to write a query so that i will get the result as
'comp' ,'ms' ,'keybr' ,'MONT' ,
I can replace the string "as" with empty string using REPLACE query.
But how do I remove the string inside double quote?
Can anyone help me doing this?
Thanks in advance.
select replace(
regexp_replace('''comp'' as "COMPUTER"'
, '(".*")'
,null)
,' as '
,null)
from dual
The regex '(".*")' selects text whatever in double quotes.
EDIT:
the regex replaced the entire length of the matching pattern. So, we might need to tokenise the string first using comma as delimiter and apply the regex. Later join it.(LISTAGG)
WITH str_tab(str1, rn) AS
(SELECT regexp_substr(str, '[^,]+', 1, LEVEL), -- delimts
LEVEL
FROM (SELECT '''comp'' as "computer",''comp'' as "computer"' str
FROM dual) tab
CONNECT BY LEVEL <= LENGTH(str) - LENGTH(REPLACE(str, ',')) + 1)
SELECT listagg(replace(
regexp_replace(str1
, '(".*")'
,null)
,' as '
,null), ',') WITHIN GROUP (ORDER BY rn) AS new_text
FROM str_tab;
EDIT2:
A cleaner approach from #EatAPeach
with x(y) as (
select q'<'comp' as "COMPUTER",'ms' as "MOUSE" ,'keybr' as "KEYBOARD",'MONT' as "MONITOR",>'
from dual
)
select y,
regexp_replace(y, 'as ".*?"' ,null)
from x;
Related
I've seen examples of how to separate comma-separated strings into rows like this:
select distinct id, trim(regexp_substr(value,'[^,]+', 1, level) ) value, level
from tbl1
connect by regexp_substr(value, '[^,]+', 1, level) is not null
order by id, level;
but, my question is, how do I do this on double quote and comma delimited strings?
Ex: the above works for strings like "1,2,3,4,5,6,7", but what about "1","2","3","4,5","6,7,8","9" so that the rows end up like:
1
2
3
4,5
6,7,8
9
edit: I'm on Oracle 11.2.0.4, 11gR2.
There is a hack. Replace the pattern "," with # and use it in regular expression.It works like a charm.
Input String : "1","2","3","4,5","6,7,8","9","Ant,B","Gradle","E,F","G"(Can be number/Character doesn't matter)
with temp as (
select replace(replace('"1","2","3","4,5","6,7,8","9","Ant,B","Gradle","E,F","G"','","','#'),'"') Colmn from dual
)
SELECT trim(regexp_substr(str, '[^#]+', 1, level)) str
FROM (SELECT Colmn str FROM temp) t
CONNECT BY instr(str, '#', 1, level - 1) > 0
Output :
STR
1
2
3
4,5
6,7,8
9
Ant,B
Gradle
E,F
G
10 rows
Refer DBFiddle link for demo.
https://dbfiddle.uk/?rdbms=oracle_18&fiddle=d09c326f614d10f5d3c407fdfd3a44c5
here is the another solution.it must be working all string with have number.
i used number values index as base.
with temp as (
select '"1","2","3",x"4,5","6,73,8","9"' Colmn from dual
)
SELECT regexp_substr(Colmn, '\d{1}', REGEXP_INSTR(Colmn, '\d{1}', REGEXP_INSTR(Colmn, '\d{1}') ,level),1 ) from temp
CONNECT BY REGEXP_COUNT (Colmn,'\d{1}')+1> level
From stack overflow, I got the standard reg expression
to eliminate -
a) special characters
b) digits
c) more than 2 spaces to single space
to include -
d) - (hyphen)
e) ' (single quote)
SELECT ID, REGEXP_REPLACE(REGEXP_REPLACE(forenames, '[^A-Za-z-]', ' '),'\s{2,}',' ') , REGEXP_REPLACE(REGEXP_REPLACE(surname, '[^A-Za-z-]', ' '),'\s{2,}',' ') , forenames, surname from table1;
Instead of 2 functions how to get the result in single function?
to include '(single quote) \' is not working in regexp_replace.
Thanks.
Oracle Setup:
CREATE TABLE test_data ( id, value ) AS
SELECT 1, '123a45b£$- ''c45d#{e''' FROM DUAL
Query:
SELECT ID,
REGEXP_REPLACE(
value,
'[^a-zA-Z'' -]| +( )',
'\1'
)
FROM test_data
Output:
ID | REGEXP_REPLACE(VALUE,'[^A-ZA-Z''-]|+()','\1')
-: | :--------------------------------------------
1 | ab- 'cde'
db<>fiddle here
I have a long string.
message := 'I loooove my pet animal';
This string in 23 chars long. If message is greater that 15 chars, I need to find the length of message where I can break the string into 2 strings. For example, in this case,
message1 := 'I loove my'
message2 := 'pet animal'
Essentially it should find the position of a whole word at the previous to 15 chars and the break the original string into 2 at that point.
Please give me ideas how I can do this.
Thank you.
Here is a general solution - with possibly more than one input string, and with inputs of any length. The only assumption is that no single word may be more than 15 characters, and that everything between two spaces is considered a word. If a "word" can be more than 15 characters, the solution can be adapted, but the requirement itself would need to state what the desired result is in such a case.
I make up two input strings in a CTE (at the top) - that is not part of the solution, it is just for testing and illustration. I also wrote this in plain SQL - there is no need for PL/SQL code for this type of problem. Set processing (instead of one row at a time) should result in much better execution.
The approach is to identify the location of all spaces (I append and prepend a space to each string, too, so I won't have to deal with exceptions for the first and last substring); then I decide, in a recursive subquery, where each "maximal" substring should begin and where it should end; and then outputting the substrings is trivial. I used a recursive query, that should work in Oracle 11.1 (or 11.2 with the syntax I used, with column names in CTE declarations - it can be changed easily to work in 11.1). In Oracle 12, it would be easier to rewrite the same idea using MATCH_RECOGINZE.
with
inputs ( id, str ) as (
select 101, 'I loooove my pet animal' from dual union all
select 102, '1992 was a great year for - make something up here as needed' from dual
),
positions ( id, pos ) as (
select id, instr(' ' || str || ' ', ' ', 1, level)
from inputs
connect by level <= length(str) - length(replace(str, ' ')) + 2
and prior id = id
and prior sys_guid() is not null
),
r ( id, str, line_number, pos_from, pos_to ) as (
select id, ' ' || str || ' ', 0, null, 1
from inputs
union all
select r.id, r.str, r.line_number + 1, r.pos_to,
( select max(pos)
from positions
where id = r.id and pos - r.pos_to between 1 and 16
)
from r
where pos_to is not null
)
select id, line_number, substr(str, pos_from + 1, pos_to - pos_from - 1) as line_text
from r
where line_number > 0 and pos_to is not null
order by id, line_number
;
Output:
ID LINE_NUMBER LINE_TEXT
---- ----------- ---------------
101 1 I loooove my
101 2 pet animal
102 1 1992 was a
102 2 great year for
102 3 - make
102 4 something up
102 5 here as needed
7 rows selected.
First you reverse string.
SELECT REVERSE(strField) FROM DUAL;
Then you calculate length i = length(strField).
Then find the first space after the middle
j := INSTR( REVERSE(strField), ' ', i / 2, i)`
Finally split by i - j (maybe +/- 1 need to test it)
DEMO
WITH parameter (id, strField) as (
select 101, 'I loooove my pet animal' from dual union all
select 102, '1992 was a great year for - make something up here as needed' from dual union all
select 103, 'You are Supercalifragilisticexpialidocious' from dual
), prepare (id, rev, len, middle) as (
SELECT id, reverse(strField), length(strField), length(strField) / 2
FROM parameter
)
SELECT p.*, l.*,
SUBSTR(strField, 1, len - INSTR(rev, ' ', middle)) as first,
SUBSTR(strField, len - INSTR(rev, ' ', middle) + 2, len) as second
FROM parameter p
JOIN prepare l
ON p.id = l.id
OUTPUT
With this code to return the nth value in a pipe delimited string...
regexp_substr(int_record.interfaceline, '[^|]+', 1, i)
it works fine when all values are present
Mike|Male|Yes|20000|Yes so the 3rd value is Yes (correct)
but if the string is
Mike|Male||20000|Yes, the 3rd value is 20000 (not what I want)
How can I tell the expression to not skip over the empty values?
TIA
Mike
The regexp_substr works this way:
If occurrence is greater than 1, then the database searches for the
second occurrence beginning with the first character following the
first occurrence of pattern, and so forth. This behavior is different
from the SUBSTR function, which begins its search for the second
occurrence at the second character of the first occurrence.
So the pattern [^|] will look for NON pipes, meaning it will skip consecutive pipes ("||") looking for a non-pipe char.
You might try:
select trim(regexp_substr(replace('A|test||string', '|', '| '), '[^|]+', 1, 4)) from dual;
This will replace a "|" with a "| " and allow you to match based on the pattern [^|]
I had a similar problem with a CSV file thus my separator was the semicolon (;)
So I started with an expression like the following one:
select regexp_substr(';2;;4;', '[^;]+', 1, i) from dual
letting i iterate from 1 to 5.
And of course it didn't work either.
To get the empty parts I just say they could be at the beginning (^;), or in the middle (;;) or at the end (;$). And or-ing all of this together gives:
select regexp_substr(';2;;4;', '[^;]+|^;|;;|;$', 1, i) from dual
And believe me or not: testing for i from 1 to 5 it works!
But let's not forgot the last details: with this approach you get ; for fields that are empty originally.
The next lines are showing how to get rid of them easily replacing them by empty strings(nulls):
with stage1 as (
select regexp_substr(';2;;4;', '[^;]+|^;|;;|;$', 1, 2) as F from dual
)
select case when F like '%;' then '' else F end from stage1
OK. This should be the best solution for you.
SELECT
REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'^([^|]*\|){2}([^|]*).*$',
'\2' )
TEXT
FROM
DUAL;
So for your problem
SELECT
REGEXP_REPLACE ( INCOMINGSTREAMOFSTRINGS,
'^([^|]*\|){N-1}([^|]*).*$',
'\2' )
TEXT
FROM
DUAL;
--INCOMINGSTREAMOFSTRINGS is your complete string with delimiter
--You should pass n-1 to obtain nth position
ALTERNATE 2:
WITH T AS (SELECT 'Mike|Male||20000|Yes' X FROM DUAL)
SELECT
X,
REGEXP_REPLACE ( X,
'^([^|]*).*$',
'\1' )
Y1,
REGEXP_REPLACE ( X,
'^[^|]*\|([^|]*).*$',
'\1' )
Y2,
REGEXP_REPLACE ( X,
'^([^|]*\|){2}([^|]*).*$',
'\2' )
Y3,
REGEXP_REPLACE ( X,
'^([^|]*\|){3}([^|]*).*$',
'\2' )
Y4,
REGEXP_REPLACE ( X,
'^([^|]*\|){4}([^|]*).*$',
'\2' )
Y5
FROM
T;
ALTERNATE 3:
SELECT
REGEXP_SUBSTR ( REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'\|',
';' ),
'(^|;)([^;]*)',
1,
1,
NULL,
2 )
AS FIRST,
REGEXP_SUBSTR ( REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'\|',
';' ),
'(^|;)([^;]*)',
1,
2,
NULL,
2 )
AS SECOND,
REGEXP_SUBSTR ( REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'\|',
';' ),
'(^|;)([^;]*)',
1,
3,
NULL,
2 )
AS THIRD,
REGEXP_SUBSTR ( REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'\|',
';' ),
'(^|;)([^;]*)',
1,
4,
NULL,
2 )
AS FOURTH,
REGEXP_SUBSTR ( REGEXP_REPLACE ( 'Mike|Male||20000|Yes',
'\|',
';' ),
'(^|;)([^;]*)',
1,
5,
NULL,
2 )
AS FIFTH
FROM
DUAL;
You can use the following :
with l as (select 'Mike|Male||20000|Yes' str from dual)
select regexp_substr(str,'(".*"|[^|]*)(\||$)',1,level,null,1)
from dual,l
where level=3/*use any position*/ connect by level <= regexp_count(str,'([^|]*)(\||$)')
As an complement to #tbone response...
Oddly, my oracle didn't recognize the blank space character in this list: [^|]
In this cases can be confusing and hard to realize what is going wrong.
Try with this regex ([^|]| )+. Also, to detect a posible first blank item, it is better to replace the separator with the space blank before, and not after it:
' |'
trim(regexp_substr(replace('A|test||string', '|', ' |'), '([^|]| )+', 1, 4))
Ok... changing the question here... I'm getting an error when I try this:
SELECT COUNT ( DISTINCT mid, regexp_replace(na_fname, '\\s*', '', 'g'), regexp_replace(na_lname, '\\s*', '', 'g'))
FROM masterfile;
Is it possible to use regexp in a distinct clause like this?
The error is this:
WARNING: nonstandard use of \\ in a string literal
LINE 1: ...CT COUNT ( DISTINCT mid, regexp_replace(na_fname, '\\s*', ''...
select trim(regexp_replace(E'\tfoo \t bar baz ', E'\\s+', ' ', 'g'))
replaces all (due to the 'g' flag) whitespace (\s) sequences (+) with a single space, then trims it, returning:
"foo bar baz"
The E is to indicate that the \ escape encoding is used.
With your new, edited question, you're probably looking for a query along the lines of:
select count(*) from (
select distinct
mid,
regexp_replace(na_fname, E'\\s*', '', 'g'),
regexp_replace(na_lname, E'\\s*', '', 'g')
from masterfile) as subquery;