Question:medium
State the output of the following query:
\[
\text{SELECT LENGTH(MID('INFORMATICS PRACTICES',5,-5));}
\]
State the output of the following query:
\[
\text{SELECT LENGTH(MID('INFORMATICS PRACTICES',5,-5));}
\]
Show Hint
MID/ SUBSTR functions require a positive length. Negative values are not valid and cause errors.
Updated On: Feb 15, 2026
- NOOUTPUT
- 5
- 0
- ERROR
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Function understanding.
- MID(string, start, length) extracts a substring from \textit{string}, beginning at \textit{start}, with a length of \textit{length}.
- LENGTH(string) returns the character count of the string.
Step 2: Query Issue.
In this query: \texttt{MID('INFORMATICS PRACTICES', 5, -5)}. The length argument in SQL cannot be negative. Therefore, this query is invalid.
Step 3: Outcome.
Instead of generating a substring, the database will produce an error.
Final Answer: \[\boxed{\text{ERROR}}\]
- MID(string, start, length) extracts a substring from \textit{string}, beginning at \textit{start}, with a length of \textit{length}.
- LENGTH(string) returns the character count of the string.
Step 2: Query Issue.
In this query: \texttt{MID('INFORMATICS PRACTICES', 5, -5)}. The length argument in SQL cannot be negative. Therefore, this query is invalid.
Step 3: Outcome.
Instead of generating a substring, the database will produce an error.
Final Answer: \[\boxed{\text{ERROR}}\]
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