How to Get Characters Between [ ] In Postgresql?

In PostgreSQL, you can extract characters between square brackets by using the substring function along with regexp_matches.

Here's an example query that demonstrates how to achieve this:

1

SELECT substring(regexp_matches('This is [an example] text with [characters] in brackets', '\[(.*?)\]', 'g')[1] FROM dual;

In this query, the regexp_matches function is used to extract all substrings that match the pattern \[(.*?)\] (anything between square brackets). The substring function is then used to extract the first matching substring from the result set.

Running this query will return an example and characters, which are the characters between the square brackets in the given text.

Best Managed PostgreSQL Hosting Providers of November 2024

1

Rating is 5 out of 5

DigitalOcean

Try It Now

2

Rating is 4.9 out of 5

AWS

Try It Now

3

Rating is 4.8 out of 5

Vultr

Try It Now

4

Rating is 4.7 out of 5

Cloudways

Try It Now

What function can I use to retrieve data between square brackets in postgresql?

You can use the substring function to retrieve data between square brackets in PostgreSQL. Here is an example query that demonstrates how to use the substring function:

1
2

SELECT substring(column_name FROM '\[(.*?)\]') AS data_between_brackets
FROM table_name;

In this query, replace column_name with the name of the column that contains the data you want to extract, and table_name with the name of the table where the column is located. The regular expression '\[(.*?)\]' matches text between square brackets, and the substring function extracts that text from the specified column.

What is the best way to extract text between square brackets without regex in postgresql?

One way to extract text between square brackets without using regex in PostgreSQL is by using a combination of the substring and position functions. Here is an example:

1
2
3
4
5

SELECT 
    substring(column_name, position('[' in column_name) + 1,
               position(']' in column_name) - position('[' in column_name) - 1)
FROM 
    table_name;

In this query, position('[' in column_name) finds the position of the opening square bracket, position(']' in column_name) finds the position of the closing square bracket, and substring extracts the text between them.

How to extract characters between square brackets in postgresql?

You can use the substring function along with regular expressions to extract characters between square brackets in PostgreSQL. Here's an example query:

1
2
3
4

SELECT
  substring(your_column FROM '\[(.*?)\]') AS extracted_text
FROM
  your_table;

In the above query, replace your_column with the column from which you want to extract characters and your_table with the table name. The regular expression '\[(.*?)\]' matches any text between square brackets and the substring function extracts the matched text.

What is the easiest way to extract characters within square brackets in postgresql?

One way to extract characters within square brackets in PostgreSQL is to use the SUBSTRING function in combination with the POSITION function to find the starting and ending positions of the square brackets.

For example, if you have a column called "text" in a table called "example_table", you can use the following query to extract characters within square brackets:

1
2

SELECT SUBSTRING(text, POSITION('[' IN text) + 1, POSITION(']' IN text) - POSITION('[' IN text) - 1)
FROM example_table;

This query will extract the characters between the first occurrence of '[' and ']' in the "text" column of the "example_table" table.