Wynajem.sql

: Use explicit INNER JOIN or LEFT JOIN syntax rather than comma-separated tables in the WHERE clause for better readability and maintenance . 4. Safety & Transactions

: Ensure that currency fields (e.g., cena , kaucja ) use precise types like DECIMAL or NUMERIC rather than floating-point types to avoid rounding errors. wynajem.sql

: Use CREATE TABLE IF NOT EXISTS or DROP TABLE IF EXISTS to ensure the script can be run multiple times without errors. : Use explicit INNER JOIN or LEFT JOIN