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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
PowerShellFiles & paths

Create a directory if needed

Ensure a directory exists before writing output.

New-Item✓ Tested
PowerShellGetting Started

Create an array of text values

PowerShell: Create an array of text values using PowerShell 7.

PowerShell✓ 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