Results for “duplicate”
Small, practical examples. Search by task or narrow things down below.
Remove duplicate values
Use a JavaScript Set to preserve the first occurrence of each primitive value.
JavaScript✓ Tested
Remove duplicate values while keeping the smallest key
SQL: Identify retained keys in a grouped subquery before deleting other copies.
SQL✓ Tested
Remove duplicate values while keeping the smallest key
SQL Server: Identify retained keys in a grouped subquery before deleting other copies.
SQL Server✓ Tested
Remove duplicate values while keeping the smallest key
Postgres: Identify retained keys in a grouped subquery before deleting other copies.
Postgres✓ Tested
Remove duplicate values while keeping the smallest key
SQLite: Identify retained keys in a grouped subquery before deleting other copies.
SQLite✓ Tested
Remove duplicate values with a Set
Keep the first occurrence order while deduplicating.
Set✓ Tested
Remove duplicates from a list
Remove repeated hashable values while preserving the order in which they first appeared.
list✓ Tested
Report duplicate business values and their frequency
SQL: Group by a candidate business key and retain only groups with multiple rows.
SQL✓ Tested
Report duplicate business values and their frequency
SQL Server: Group by a candidate business key and retain only groups with multiple rows.
SQL Server✓ Tested
Report duplicate business values and their frequency
Postgres: Group by a candidate business key and retain only groups with multiple rows.
Postgres✓ Tested
Report duplicate business values and their frequency
SQLite: Group by a candidate business key and retain only groups with multiple rows.
SQLite✓ Tested
Sort and deduplicate lines
Sort lines alphabetically and remove duplicate lines in a predictable C locale.
sort✓ Tested