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MySQL LENGTH()

The LENGTH() function returns the length of a string in bytes. It is useful for analyzing the size of text data and ensuring data consistency.

Examples

1. Getting the Length of a String

SELECT LENGTH('Raja Raja Chola') AS string_length;

Code Explanation: This query returns the length of the string 'Raja Raja Chola', which is 16 bytes.

2. Using LENGTH with Column Data

SELECT king_name, LENGTH(king_name) AS name_length FROM tamil_kings_auto_increment;

Code Explanation: This query returns the length of each king_name in bytes.

Best Practices

  • Use LENGTH() to check the size of text data, especially when working with data constraints.
  • Remember that multibyte characters may affect the byte count.

Key Takeaways

  • The LENGTH() function returns the size of a string in bytes.
  • It is useful for data analysis and validation.
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