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SQL String Manipulation Interview Questions
String manipulation questions test your ability to clean, parse, and normalize text data.
Expect SUBSTRING, SPLIT, CONCAT, TRIM, and pattern matching with LIKE or regex.
Interviewers care about correctness, edge cases, and readable logic.
51Questions
26Companies
Easy 1 • Medium 50 • Hard 0Difficulty mix
Common SQL string manipulation interview patterns
- Extracting domains or prefixes from strings
- Splitting delimited fields into components
- Normalizing case and trimming whitespace
- Pattern matching with LIKE or regex
- Building formatted strings with CONCAT
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Common mistakes with SQL string manipulation
- Off-by-one errors in SUBSTRING indexes
- Not handling NULL or empty strings
- Using LIKE when regex is needed (or vice versa)
- Ignoring leading and trailing whitespace
- Assuming fixed string lengths
How string manipulation questions are evaluated in interviews
Correct parsing and edge-case handling are the main signals.
Explain how you handle NULLs and inconsistent formats.
Prefer clear, readable logic over clever hacks.