sql - How to get the position of the first occurrence of a digit in a postgres select

Sql - How to get the position of the first occurrence of a digit in a postgres select

To get the position of the first occurrence of a digit in a string column in PostgreSQL, you can use the REGEXP_MATCH function along with the STRPOS function. Here's an example:

SELECT STRPOS(your_column, REGEXP_MATCH(your_column, '[0-9]')) AS digit_position FROM your_table;

This query will return the position of the first digit occurrence in the your_column column of the your_table table.

Examples

  1. Find the position of the first digit in a string in PostgreSQL

    Description: Use the POSITION function combined with a regular expression pattern to find the position of the first digit in a string.

    Code:

    SELECT POSITION(('0' || '1' || '2' || '3' || '4' || '5' || '6' || '7' || '8' || '9') IN my_column) FROM my_table;

  2. Using regexp_matches to get the position of the first digit in PostgreSQL

    Description: The regexp_matches function can be used to find the position of the first digit using a regular expression.

    Code:

    SELECT position FROM ( SELECT my_column, regexp_matches(my_column, '[0-9]') AS position FROM my_table ) AS subquery;

  3. Locate the first digit in a string using regexp_replace in PostgreSQL

    Description: Use the regexp_replace function to replace all characters before the first digit and find the position.

    Code:

    SELECT LENGTH(regexp_replace(my_column, '^[^0-9]*', '')) AS first_digit_position FROM my_table;

  4. Extract the position of the first digit in a string using strpos in PostgreSQL

    Description: Use the strpos function along with a regular expression to locate the first digit.

    Code:

    SELECT strpos(my_column, substring(my_column FROM '[0-9]')) AS first_digit_position FROM my_table;

  5. Using a custom function to find the first digit position in PostgreSQL

    Description: Create a custom function to iterate through the string and find the position of the first digit.

    Code:

    CREATE OR REPLACE FUNCTION first_digit_position(s TEXT) RETURNS INT AS $$ DECLARE i INT; BEGIN FOR i IN 1..LENGTH(s) LOOP IF SUBSTRING(s, i, 1) ~ '[0-9]' THEN RETURN i; END IF; END LOOP; RETURN NULL; END; $$ LANGUAGE plpgsql; SELECT first_digit_position(my_column) FROM my_table;

  6. Using regexp_instr to find the position of the first digit in PostgreSQL

    Description: Utilize the regexp_instr function to find the position of the first digit directly.

    Code:

    SELECT regexp_instr(my_column, '[0-9]') AS first_digit_position FROM my_table;

  7. Finding the first digit position using a combination of regexp_matches and array_position

    Description: Combine regexp_matches and array_position to determine the first digit's position.

    Code:

    SELECT array_position(regexp_matches(my_column, '.{0,0}[0-9]', 'g'), substring(my_column FROM '[0-9]')) AS first_digit_position FROM my_table;

  8. Using CASE statement to find the first digit position in PostgreSQL

    Description: Use a CASE statement to iterate over possible digit positions and find the first occurrence.

    Code:

    SELECT CASE WHEN my_column ~ '[0-9]' THEN strpos(my_column, substring(my_column FROM '[0-9]')) ELSE NULL END AS first_digit_position FROM my_table;

  9. Combining substring and position functions to find the first digit position

    Description: Use substring and position together to locate the first digit in a string.

    Code:

    SELECT position FROM ( SELECT my_column, position(substring(my_column FROM '[0-9]') IN my_column) AS position FROM my_table ) AS subquery;

  10. Using generate_series to find the position of the first digit in PostgreSQL

    Description: Use generate_series to generate positions and find the first digit.

    Code:

    SELECT min(i) AS first_digit_position FROM my_table, generate_series(1, length(my_column)) AS i WHERE substring(my_column, i, 1) ~ '[0-9]';

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