MySQL SELECT working for text containing a newline

MySQL SELECT working for text containing a newline

To select text containing a newline character ('\n') in MySQL, you can use a combination of the LIKE operator and the % wildcard. Here's an example:

Suppose you have a table called my_table with a column text_column:

CREATE TABLE my_table ( id INT PRIMARY KEY AUTO_INCREMENT, text_column TEXT ); INSERT INTO my_table (text_column) VALUES ('This is a text with a newline\ncharacter.');

To select rows where text_column contains a newline character, you can use the LIKE operator with the % wildcard:

SELECT * FROM my_table WHERE text_column LIKE '%\n%';

This query will select all rows from my_table where the text_column contains a newline character.

Alternatively, if you want to match specific lines based on the newline character, you can use the '\n' literal in the LIKE pattern:

SELECT * FROM my_table WHERE text_column LIKE '%\nThis is a text%';

This query will select rows where the text_column starts with the specified text after a newline character.

Note that in MySQL, the newline character is represented as '\n'. If your text contains a different newline representation (e.g., \r\n for Windows), you need to adjust the query accordingly.

Examples

  1. MySQL SELECT Text with Newline Characters

    • Description: Select rows containing text with newline characters in MySQL.
    • Code:
      SELECT * FROM table_name WHERE column_name LIKE '%\n%';

  2. MySQL SELECT Text Including Newlines

    • Description: Retrieve text that includes newline characters using the LIKE operator.
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE '%\n%';

  3. MySQL How to Handle Newline Characters in SELECT Query

    • Description: Handle newline characters in a MySQL SELECT query by matching against CHAR(10).
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE CONCAT('%', CHAR(10), '%');

  4. MySQL SELECT Records Containing Newline

    • Description: Select records containing newline characters by using regular expressions.
    • Code:
      SELECT column_name FROM table_name WHERE column_name REGEXP '\n';

  5. MySQL SELECT Text with Newlines and Carriage Returns

    • Description: Select text containing both newline and carriage return characters.
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE CONCAT('%', CHAR(13), CHAR(10), '%');

  6. MySQL Escape Newline Characters in SELECT Query

    • Description: Escape newline characters in a SELECT query to find matching text.
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE '%\\n%';

  7. MySQL SELECT Handling Multiline Text Fields

    • Description: Handle multiline text fields in MySQL using the LIKE operator.
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE '%\n%';

  8. MySQL SELECT Specific Lines from Multiline Text

    • Description: Select specific lines from multiline text using substring functions.
    • Code:
      SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(column_name, '\n', 1), '\n', -1) AS first_line FROM table_name;

  9. MySQL SELECT Rows Ignoring Newline Characters

    • Description: Select rows while ignoring newline characters using REPLACE.
    • Code:
      SELECT REPLACE(column_name, '\n', ' ') AS column_no_newlines FROM table_name;

  10. MySQL Select Text Containing Newlines with CONCAT and LIKE

    • Description: Use CONCAT with LIKE to select text containing newlines.
    • Code:
      SELECT column_name FROM table_name WHERE column_name LIKE CONCAT('%', CHAR(10), '%');

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