Instead of building a query string with variables directly, you use placeholders (like ? ). This is essential for preventing , a common security vulnerability where users can manipulate your database through input fields.
: Instead of using SELECT * , only request the specific columns you need. Always include a WHERE clause to avoid loading massive amounts of unnecessary data.
: If you are using stored procedures, look into commands like SET XACT_ABORT ON (in SQL Server) to automatically roll back changes if an error occurs. moja_prva_aplikacija.sql
: They separate the SQL code from the user data, so the data is never executed as a command.
: Add indexes to columns that you search or join frequently to speed up retrieval times. Instead of building a query string with variables
One of the most critical features to implement in your first SQL project is . Key Feature: Prepared Statements
To make your first application robust, consider adding these elements: : Instead of using SELECT * , only
: Use Primary Keys to uniquely identify records and Foreign Keys to create relationships between tables (e.g., connecting a Users table to an Orders table).