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Results for “State & reducers”

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SQLReporting & grouped calculations

Count rows satisfying separate conditions

SQL: SUM over CASE expressions calculates several conditional counts in one scan.

SQL✓ Tested
SQL ServerReporting & grouped calculations

Count rows satisfying separate conditions

SQL Server: SUM over CASE expressions calculates several conditional counts in one scan.

SQL Server✓ Tested
PostgresReporting & grouped calculations

Count rows satisfying separate conditions

Postgres: SUM over CASE expressions calculates several conditional counts in one scan.

Postgres✓ Tested
SQLiteReporting & grouped calculations

Count rows satisfying separate conditions

SQLite: SUM over CASE expressions calculates several conditional counts in one scan.

SQLite✓ Tested
SQLSchema design & transactions

Create an index for an equality filter

SQL: A nonunique index can support lookups on a frequently filtered column.

SQL✓ Tested
SQL ServerSchema design & transactions

Create an index for an equality filter

SQL Server: A nonunique index can support lookups on a frequently filtered column.

SQL Server✓ Tested
PostgresSchema design & transactions

Create an index for an equality filter

Postgres: A nonunique index can support lookups on a frequently filtered column.

Postgres✓ Tested
SQLiteSchema design & transactions

Create an index for an equality filter

SQLite: A nonunique index can support lookups on a frequently filtered column.

SQLite✓ Tested
SQLSchema design & transactions

Create an index matching filter and ordering columns

SQL: Place the equality-filter column before the ordering column in this composite index.

SQL✓ Tested
SQL ServerSchema design & transactions

Create an index matching filter and ordering columns

SQL Server: Place the equality-filter column before the ordering column in this composite index.

SQL Server✓ Tested
PostgresSchema design & transactions

Create an index matching filter and ordering columns

Postgres: Place the equality-filter column before the ordering column in this composite index.

Postgres✓ Tested
SQLiteSchema design & transactions

Create an index matching filter and ordering columns

SQLite: Place the equality-filter column before the ordering column in this composite index.

SQLite✓ Tested