Results for “Collections & data structures”
Small, practical examples. Search by task or narrow things down below.
Read the byte size of a regular file
C++: file_size reads filesystem metadata without loading file contents.
C++✓ Tested
Read the last value of the complete partition
SQL: Specify an unbounded-following frame so LAST_VALUE does not stop at the current row.
SQL✓ Tested
Read the last value of the complete partition
SQL Server: Specify an unbounded-following frame so LAST_VALUE does not stop at the current row.
SQL Server✓ Tested
Read the last value of the complete partition
Postgres: Specify an unbounded-following frame so LAST_VALUE does not stop at the current row.
Postgres✓ Tested
Read the last value of the complete partition
SQLite: Specify an unbounded-following frame so LAST_VALUE does not stop at the current row.
SQLite✓ Tested
Read the next row’s value
SQL: LEAD reads a later ordered row without a self join and supports a fallback at the end.
SQL✓ Tested
Read the next row’s value
SQL Server: LEAD reads a later ordered row without a self join and supports a fallback at the end.
SQL Server✓ Tested
Read the next row’s value
Postgres: LEAD reads a later ordered row without a self join and supports a fallback at the end.
Postgres✓ Tested
Read the next row’s value
SQLite: LEAD reads a later ordered row without a self join and supports a fallback at the end.
SQLite✓ Tested
Read the smallest and largest values
SQL: Use MIN and MAX without sorting and fetching every row.
SQL✓ Tested
Read the smallest and largest values
SQL Server: Use MIN and MAX without sorting and fetching every row.
SQL Server✓ Tested
Read updated base-table values through a view
SQL: An ordinary view reflects later changes to its underlying data.
SQL✓ Tested