Questions tagged [string-manipulation]
String manipulation on the database server side is achieved using built-in string processing functionality (operators, functions). Use this tag for questions where string processing is central to the problem.
66
questions
1
vote
1
answer
101
views
Find and show special character codes from nvarchar column
I want to know which special characters (line breaks, tabs, etc) are in my column of type nvarchar.
I know how I can select which rows contain a specific character.
e.g. SELECT * FROM your_table WHERE ...
- 229
1
vote
1
answer
37
views
Remove third coordinate from string
I have geometries represented as strings (Oracle 18c):
with cte as (
select 'LINESTRING ( 1.0 2.0, 3 4)' as txt from dual union all
select 'LINESTRING M ( 1 2 3, 4 5 6.0)'...
- 1,389
0
votes
1
answer
31
views
Compare occurence of chars in PostgreSQL string
I have some data like this:
metaphone
lag
FLKSW
[null]
PPS
FLKSW
PPS
PPS
PSP
PPS
And I want to compare the string values in both columns on the folowing condition: they're similar (assign some ...
- 3
1
vote
1
answer
36
views
In a string, replace third number in each set with new number
I have a string that has coordinates.
Individual coordinates are separated by spaces.
Vertices (X Y Z coordinates) are separated by commas.
Vertex groups are wrapped in brackets and separated by ...
- 1,389
0
votes
1
answer
29
views
SQL in Access to add leading 0 in front of zip codes
for a project I am working with a table of zip-codes that I imported from a *.csv file, exported form Excel. Those zipcodes all have 5 numbers and are formatted as text within my database. Some of ...
- 1
-5
votes
1
answer
141
views
Select INTs from start of string separated by a character (pipe). Update other columns using these INTs
In the above screen shot, the Description column has many special characters. We want before | number update in T1 column and | after number in T2 column. Please suggest the proper syntax.
If there ...
1
vote
2
answers
73
views
Determine Ideal Collation Set for correct data storage
Alright so I have a MariaDB DB and I've just noticed some weird storage issues, like the following:
My JSON columns (which in MariaDB are LONGTEXT) have an automatically set collation of utf8mb4_bin. ...
- 147
0
votes
0
answers
41
views
Convert any string to url valid percent encoding in BigQuery
I am trying to convert any string with any set of special characters into a valid url of the format below.
In Bigquery
Example:
/artwork-v2/-̴̕ι-̶͔͛n̴e̷p̸u̴̒n̵uś̵̥o̵̙̾rt̷͗um̶̹͐-20380
encodes to:
/...
0
votes
2
answers
441
views
Batch update to replace special characters in SQL Studio Management
I am trying to remove/correct some special characters in my database that show strange behaviour when exported.
Specifically & and the apostrophe ’
I ran a query to find the values that contain ...
- 13
2
votes
1
answer
198
views
How can I change string output in a hierarchy tree with PostgreSQL?
I have a table like this:
-------------------------------------------------
| id | description | parent_id | cost
--------------------------------------------------
| 1 | Radiology ...
- 37
1
vote
3
answers
91
views
String concatenation and DATE/Number ordinals in one string?
How can I combine functions with strings to end up with a whole in one sentence?
I mean something like this (expected result):
Today is the 3rd day of the year, the 2nd week of the year and the 1st ...
- 11
0
votes
2
answers
525
views
How to remove specials characters, but replace spaces?
I have a string with spaces & special characters: ABC%$! DEF*& GHI
I want to remove all the specials characters, but replace the spaces with an underscore: ABC_DEF_GHI
I have:
REGEXP_REPLACE(...
- 131
0
votes
1
answer
241
views
Stored procedure to change string to datetime in MySQL
This is a follow up to this question. Turns out the driver that I am using (can't change it) is not compatible with timestamp values. Lets say it is set in stone that I have to load the data into my ...
- 105
0
votes
1
answer
40
views
Problem using 'Regular expression' in order to split characters of a column when there is no delimiter between them
I have a table with below structure:
create table TBL_TEST
(
col_id NUMBER,
col_name VARCHAR2(500)
)
Some example data :
col_id | col_name
-----------------
1 | aetnap
2 | ...
- 1,302
0
votes
1
answer
33
views
How to massively change string capitalization in a table?
I have a project where authors' names have been inserted in all capital letters (ex. JOHN KRAUS, LEONARD MILES, NAOMI DAWSON). Now I need these values in "normal" case (ex. John Kraus, ...
- 103
0
votes
2
answers
68
views
How do I speed up a string manipulation query where I want to replace characters, extract certain values and update a table with the results?
I am trying to extract information from strings that are presented in a key-value format, with the keys and values being separated by commas. I want to extract the values associated with certain keys ...
- 25
1
vote
1
answer
588
views
Error "ORA-12726:unmatched bracket in regular expression" while trying to separate a part of a string from other part
I have a string like this :
v_sgtring:'sum:[sum(x)>1 and sum(y)>2 and sum(z)>3],where:[n=1 and m=2]'
and I need to separate sum:[] from where:[] and assign them to different variables like ...
- 1,302
0
votes
0
answers
29
views
How to separate a part of a string from other parts in Oracle SQL using regular_expression
I have a string like this :
string := ' (sum(x) = 12 and
sum(y) = 13 and
sum(z) = 14
) and
w = 'p' AND
q = 'p' AND
l ...
- 1,302
3
votes
2
answers
1k
views
Replace a sequential set of numbers with special character
I have a varchar(200) column that contains entries such as,
ABC123124_A12312
ABC123_A1212
ABC123124_B12312
AC123124_AD12312
A12312_123
etc..
I want to replace a sequence of numbers with a single * ...
- 33
1
vote
3
answers
116
views
REPLICATE() return type for VARBINARY input
REPLICATE ( string_expression ,integer_expression )
As documentation says, it
returns the same type as string_expression.
I see that return type is always VARCHAR.
declare @vb varbinary(10) = ...
- 335
3
votes
1
answer
152
views
Concatenate a string value from table A to a text field in table B, in a scalable way
On a daily basis, I am adding values from the following table (table1):
Id Name Value
1 'Name 1' 789
2 'Name 2' 789
3 'Name 3' 789
To the text field (Values) in the following ...
- 31
0
votes
1
answer
79
views
Behavior of STUFF function for empty strings
When working on answering another question (on SO), I came across some unexpected (to me) behavior with the STUFF function.
SELECT STUFF
(
'a', -- character expression
1, -- start
1, -- ...
- 173
2
votes
4
answers
2k
views
remove leading and trailing quotes
I have a field that may start and end with quotes. I only want to remove the quotes if the string starts and ends with quotes. If quotes exists inside the string then I wish to retain them.
I have ...
- 123
0
votes
1
answer
57
views
How to use query result as REPLACE parameters
i'm trying to:
1- Find a string inside a lot of content
2- Replace that specific part of the string with a new one using REPLACE function like this:
REPLACE(column_name, query#1, query#2)
Is this ...
- 27
1
vote
1
answer
34
views
Using LOCATE() Function as SUBSTRING() parameter gives ramdom result. Extracting string from text
I have several rows with a lot of content and i'm trying to find some code and extract it. It looks like this:
Some code...
<div> </div>
<div>[flv:http://submarino-libre....
- 27
0
votes
2
answers
61
views
Get matching part from conditional pattern
I'm having a table like this:
|id|key |value |
------------------------
| 0|name |Homer |
| 1|surname|Simpson |
| 2|town |Springfield|
I'm running this query:
SELECT *
FROM ...
- 103
5
votes
1
answer
4k
views
How to pass variable to PL/pgSQL code from the command line?
I am running a psql script from the command line with variables something like:
psql ...... -v now_utc=$NOW_UTC
Then I want to use this in my script like:
$$
DECLARE
_now_date timestamp := :...
- 151
0
votes
3
answers
683
views
How to trim a string by finding multiple words
I want to trim a string if it contains certain words or characters. This is just part of a big stored procedure.
I want if v_selection_name contains any of those characters .eg: ' (RES)' or ' (R)' ...
- 115
5
votes
2
answers
968
views
Wordcount in a field (all and unique) - is there a more elegant/optimal way?
Answering this question,
Given this table (constructed from the question):
CREATE TABLE wordcount (id SERIAL NOT NULL PRIMARY KEY, description TEXT NOT NULL);
INSERT INTO wordcount (description) ...
- 27.2k
1
vote
1
answer
20
views
pgsql Return Partial Text Field Ending In A Whole Word
I found this PHP code that returns a sub-string ending with a whole word (IE separated by a space):
if ( strlen( $body ) < $maxlength ) return $body;
$body = substr( $body , 0 , $maxlength );
$...
- 133
1
vote
1
answer
877
views
Using SUBSTRING and RTRIM Together
I have a VARCHAR field that contains a city and a 2 digit state abbreviation, but there tends to be leading and trailing spaces in the field. I need to parse out the City and State Abbrev into ...
- 189
3
votes
2
answers
6k
views
How to replace multiple parts of a string with data from multiple rows?
Here's a fiddle to show what I'm after.
Given a table with two columns - an integer ID and a text-based string - I want to start with a string value that encodes any number of integers wrapped in ...
- 1,425
3
votes
1
answer
43
views
Unexpected behavior from ltrim in postgres
select ltrim('Test Thing', 'Test ');
Expected: 'Thing'
Actual Result: 'hing'
Why does the 'T' in 'Test' match and trim the 'T' from 'Thing'?
- 31
0
votes
1
answer
227
views
How to eliminate for loop in a nested aggregate problem
I have a parsing problem that I am solving with a FOR LOOP in plpgsql, basically because I can't figure out how to solve it with subqueries and nested aggregates. My question is can the for loop be ...
- 169
0
votes
1
answer
134
views
SQL Server 2017 - Extracting source and target column names within a string containing column mappings
I have the following format string stored in text (could be any number of columns):
col1_source|col1_target;col2_source|col2_target;col3_source|col3_target;...
I'm trying to come up with an ...
- 13
1
vote
2
answers
360
views
Strip longest common suffix and concat in Postgres
Given a table t:
id | name
------------
1 | abcfug
1 | deffug
1 | hijfug
2 | etc
How can I do something like:
select string_agg(strip_lcs(name), ', ') from t where id = 1
returning:
abc, def, ...
- 129
1
vote
3
answers
1k
views
How do You concatenate a value to an array that was retrieved through a query in sql?
I have a table named "mkvtable" that establishes a correspondence between individual strings and arrays of strings:
word | mkvword
---------+-----------------
hello | {world,friend}
...
- 78
1
vote
2
answers
177
views
SUBSTRING and IF statement
I have varchar column, its name is column1 and has records like 111232435-0 and 1123443530. The last digit is not always 0; it can be 0-9.
Some of them are digits with (-), other are digits. I want ...
- 37
-1
votes
2
answers
597
views
TSQL Query to Remove Dates in Multiple Formats from Text Values [closed]
I have a table with list of text values that contain dates in any format types.
I need a TSQL query to remove the dates from each row in the table.
The date samples are below. What is the best way ...
- 503
0
votes
0
answers
268
views
nText and String manipulation. SQL SERVER
Parent question - Thanks to Paul White and Tom V for answer.
I am making little modification's to Paul White's answer to suit my requirements.
I would like to change the following to replace a ...
- 1
2
votes
2
answers
349
views
String manipulation tools to populate a variable for two "functions"
Versions: SQL Server 2008 R2 - 2014
I'm using a server audit to find changes to logins on my SQL Server instances, and writing it to the ERRORLOG directory path. Unfortunately, not all the instances ...
- 519
1
vote
1
answer
473
views
Does a Levenshtein distance involve some computation for each single row?
Let's say I have, in a SQL DB, a table with 2 columns: id integer, description text and 100,000 rows. The column description has always < 20 characters.
If I want to:
SELECT * FROM mytable WHERE ...
- 161
0
votes
0
answers
650
views
MySQL version of split_to_array or split_to_table?
PostgreSQL supports two String Functions, that are incredibly useful
regexp_split_to_array
regexp_split_to_table
Both of these functions essentially take two strings, (a) a pattern and (b) an input ...
- 56.2k
0
votes
1
answer
38
views
PostgreSQL: Function to reformat a string
Suppose I have a string such as:
abcdefghi
and I would like to reformat it as:
abc def ghi
(that is, I have added some formatting spaces to the string).
Is there a PostgreSQL function which will ...
- 2,337
-2
votes
2
answers
583
views
Error when using a query as a function parameter [closed]
I have followed this tutorial for creating a string splitting function.
When I try to run the function from the article using a SELECT as the first parameter, I get the following error:
select '...
- 97
7
votes
1
answer
2k
views
Is the function PARSENAME() the opposite of QUOTENAME()
In the question Is there any (hidden) built-in function on MS-SQL to unquote object names? the author was seeking advice on if there was an internal function to "UNQUOTE" a quoted string. The author ...
- 15k
1
vote
1
answer
3k
views
Use STUFF function to insert at multiple points in a string?
Is there a way that I can replace a substring in SQL server while remaining 'aware' of what I'm replacing so that I can then re-insert that content?
I am building a string of column names to pivot on,...
- 2,222
24
votes
1
answer
69k
views
Decode Base64 String Natively in SQL Server
I have a varchar column in a table in SQL Server which hold a base64-encoded text string which I would like to decode into it's plain text equivalent
Does SQL Server have any native functionality to ...
- 2,507
0
votes
1
answer
5k
views
Concatenate with NULL values ( Should not replace NULL )
After some time searching for an answer, I got a LOT of question saying to use coalesce,concat(), and etc, but what I need is:
Table:
create table nulos ( nome varchar(max))
alter table nulos add ...
- 7,104
6
votes
3
answers
6k
views
Filtering characters to just return numeric characters in a string?
I want to filter an nvarchar field to return just the numeric values.
I have some SQL to do this but it seems way more complicated than it needs to be. I am interested in finding out if anyone has a ...
- 413