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Results for “GROUP BY”
Small, practical examples. Search by task or narrow things down below.
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Update several classifications in one statement
Postgres: A CASE expression computes the new value for each row covered by the update predicate.
Postgres✓ Tested
Update several classifications in one statement
SQLite: A CASE expression computes the new value for each row covered by the update predicate.
SQLite✓ Tested
Validate a small stored payload with a checksum
Arduino / C: Store a checksum with the payload and reject a changed byte.
Arduino / C✓ Tested
Verify a file against a checksum manifest
Linux Commands: Use sha256sum -c with a manifest obtained from a trusted source.
Linux Commands✓ Tested
Visit files recursively
Java: Close the stream returned by Files.walk and sort relative paths for stable output.
Java✓ Tested
Write and read a setting in EEPROM
Persist one byte using the update operation.
EEPROM✓ Tested
Write text to a new practice file
Linux Commands: Write text to a new practice file using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested