Q. Which collations does this statement list?

Code:
SHOW COLLATION LIKE 'utf8%'
  • (A) names ending in utf8%
  • (B) names beginning with utf8
  • (C) names ending with utf8
  • (D) names containing utf8% anywhere
πŸ’¬ Discuss
βœ… Correct Answer: (B) names beginning with utf8
Explanation:

The SQL statement:

SHOW COLLATION LIKE 'utf8%'

uses the SHOW COLLATION command to list all collations whose names begin with utf8. The % symbol is a wildcard character in SQL that matches any sequence of characters, including no characters at all. Therefore, the pattern 'utf8%' matches any collation names that start with "utf8."

For example, it could list collations like:

  • utf8_general_ci
  • utf8_unicode_ci
  • utf8mb4_general_ci

These collations all start with utf8.

Why the other options are incorrect:

  • (A) names ending in utf8%: This would match names ending in utf8 followed by any sequence of characters, but the % after utf8 means it can match anything starting with utf8, not just at the end.
  • (C) names ending with utf8: This would be incorrect because utf8% matches names starting with utf8, not ending with it.
  • (D) names containing utf8% anywhere: The % symbol at the end means the match is for names starting with utf8, not anywhere in the name.

Therefore, the correct answer is (B) names beginning with utf8.

Explanation by: Praveen Singh

The SQL statement:

SHOW COLLATION LIKE 'utf8%'

uses the SHOW COLLATION command to list all collations whose names begin with utf8. The % symbol is a wildcard character in SQL that matches any sequence of characters, including no characters at all. Therefore, the pattern 'utf8%' matches any collation names that start with "utf8."

For example, it could list collations like:

  • utf8_general_ci
  • utf8_unicode_ci
  • utf8mb4_general_ci

These collations all start with utf8.

Why the other options are incorrect:

  • (A) names ending in utf8%: This would match names ending in utf8 followed by any sequence of characters, but the % after utf8 means it can match anything starting with utf8, not just at the end.
  • (C) names ending with utf8: This would be incorrect because utf8% matches names starting with utf8, not ending with it.
  • (D) names containing utf8% anywhere: The % symbol at the end means the match is for names starting with utf8, not anywhere in the name.

Therefore, the correct answer is (B) names beginning with utf8.

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