This review evaluates the script for schema integrity, query efficiency, and adherence to SQL development standards .
: For operations involving multiple updates (e.g., marking an item as "rented" while creating a billing record), wrap the logic in a BEGIN TRANSACTION and COMMIT to maintain data integrity.
: Keywords should be in UPPERCASE (e.g., SELECT , FROM , WHERE ) to distinguish them from table and column names, which should follow a consistent snake_case or PascalCase naming convention. wynajem.sql
: Replace SELECT * with explicit column names. This reduces unnecessary data transfer and prevents issues if the table schema changes .
: Use CREATE TABLE IF NOT EXISTS or DROP TABLE IF EXISTS to ensure the script can be run multiple times without errors. This review evaluates the script for schema integrity,
: Ensure foreign keys (e.g., klient_id , obiekt_id ) and frequently filtered columns (like data_wynajmu ) are properly indexed to speed up search queries.
: Use descriptive aliases for tables (e.g., FROM Wynajmy AS w ) instead of single letters to improve clarity in multi-table joins. 3. Performance & Optimization : Replace SELECT * with explicit column names
: Verify that the rental data is normalized (e.g., separate tables for Klienci (Customers), Obiekty (Properties/Items), and Wynajmy (Rentals)). Ensure there is no redundant storage of rental rates in the transaction table if they can be retrieved via a JOIN from the primary item table .