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Small, practical examples. Search by task or narrow things down below.

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SQLBulk changes & set operations

Update several classifications in one statement

SQL: A CASE expression computes the new value for each row covered by the update predicate.

SQL✓ Tested
SQL ServerBulk changes & set operations

Update several classifications in one statement

SQL Server: A CASE expression computes the new value for each row covered by the update predicate.

SQL Server✓ Tested
PostgresBulk changes & set operations

Update several classifications in one statement

Postgres: A CASE expression computes the new value for each row covered by the update predicate.

Postgres✓ Tested
SQLiteBulk changes & set operations

Update several classifications in one statement

SQLite: A CASE expression computes the new value for each row covered by the update predicate.

SQLite✓ Tested
Arduino / CEEPROM & program memory

Validate a small stored payload with a checksum

Arduino / C: Store a checksum with the payload and reject a changed byte.

Arduino / C✓ Tested
Linux CommandsArchive integrity & packaging

Verify a file against a checksum manifest

Linux Commands: Use sha256sum -c with a manifest obtained from a trusted source.

Linux Commands✓ Tested
JavaFile operations & binary data

Visit files recursively

Java: Close the stream returned by Files.walk and sort relative paths for stable output.

Java✓ Tested
Arduino / CData & storage

Write and read a setting in EEPROM

Persist one byte using the update operation.

EEPROM✓ Tested
Linux CommandsGetting Started

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