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How to Add [] Chars Between Numbers Of String In Postgresql?

4 minutes read

In PostgreSQL, you can add brackets [] characters between numbers in a string by using the REPLACE() function. You can provide the string column and specify the numbers that you want to wrap with brackets. For example, if you have a string '12345', you can use the following query to add brackets between the numbers:


SELECT REPLACE('12345', ' ', '][') AS modified_string;


This will return the modified string as '1[2[3[4[5'. You can adjust the REPLACE() function parameters according to your specific requirements and column values.


How to add semicolons between numbers of string in PostgreSQL?

You can use the string_agg function in PostgreSQL to concatenate numbers separated by semicolons. Here is an example query to demonstrate how you can achieve this:

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SELECT string_agg(number::text, ';' ORDER BY number) AS numbers_with_semicolons
FROM (
  SELECT generate_series(1, 10) AS number
) t;


In this query:

  • generate_series(1, 10) generates a series of numbers from 1 to 10.
  • string_agg(number::text, ';' ORDER BY number) concatenates the numbers as strings with semicolons between them.
  • You can replace 10 with any range of numbers you want to concatenate in the generate_series function.


This query will return a single string with all numbers separated by semicolons.


How to add question marks between numbers of string in PostgreSQL?

You can use the following query to insert question marks between each number in a string in PostgreSQL:

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SELECT regexp_replace('1234567890', '(\d)', '\1?', 'g') AS string_with_question_marks;


This query uses the regexp_replace function to replace each number in the input string with the number followed by a question mark. The regular expression (\d) matches any digit in the string, and the replacement \1? inserts a question mark after the matched digit. The g flag ensures that all occurrences of digits in the string are replaced.


You can replace the input string '1234567890' with any string that contains numbers to add question marks between them.


How to add periods between numbers of string in PostgreSQL?

You can use the REGEXP_REPLACE function in PostgreSQL to add periods between numbers in a string. Here is an example query to add periods between numbers in a string:

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SELECT REGEXP_REPLACE('1234567890', '(\d{3})(?!$)', '\1.', 'g');


In this query, '1234567890' is the input string. The regular expression '(\d{3})(?!$)' matches groups of three digits that are not at the end of the string. The replacement string '\1.' adds a period after each group of three digits. The 'g' flag at the end of the function call ensures that all occurrences of the regular expression are replaced.


After running this query, the output will be '123.456.789.0', with periods added between each group of three digits.


How to add commas between numbers of string in PostgreSQL?

You can use the built-in string_agg() function in PostgreSQL to add commas between numbers in a string. Here's an example query to demonstrate how you can achieve this:

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SELECT string_agg(number, ',') WITHIN GROUP (ORDER BY number)
FROM unnest(string_to_array('1234567890', '')) AS number;


In this query, we first split the input string '1234567890' into an array of individual characters using the string_to_array() function. We then use the unnest() function to expand this array into a set of rows, each containing a single character.


We then use the string_agg() function to concatenate these characters back into a single string, with a comma between each number. The WITHIN GROUP (ORDER BY number) clause ensures that the numbers are ordered before concatenation.


After running this query, the output will be '1,2,3,4,5,6,7,8,9,0', with commas added between each number.


How to add backslashes between numbers of string in PostgreSQL?

One way to add backslashes between numbers of a string in PostgreSQL is to use the regexp_replace function to replace each number with the number followed by a backslash. Here is an example query:

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SELECT regexp_replace('12345', '(\d)', '\1\\', 'g');


This query will take the input string '12345' and replace each digit (\d) with the same digit followed by a backslash. The 'g' flag is used to replace all occurrences of digits in the string.


The result of the above query will be: '1\2\3\4\5'


You can adjust the input string and regular expression pattern as needed for your specific use case.


How to add minus signs between numbers of string in PostgreSQL?

To add minus signs between numbers in a string in PostgreSQL, you can use the REPLACE function to replace the whitespace between numbers with a minus sign. Here's an example:

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SELECT REPLACE('123 456 789', ' ', '-') AS result;


This will output:

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result
-------
123-456-789


You can modify the input string and the separator as needed for your specific use case.

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