Junior — Middle
Do you have experience with consolidation and executing SQL queries?
sobes.tech AI
Answer from AI
Yes, experience with consolidation and executing SQL queries generally includes:
- Combining data from multiple tables using JOINs (INNER, LEFT, RIGHT, etc.).
- Using aggregate functions (SUM, COUNT, AVG) for summary data.
- Optimizing queries for better performance.
An example of a simple join query:
SELECT users.name, orders.amount
FROM users
JOIN orders ON users.id = orders.user_id
WHERE orders.date > '2024-01-01';
In PHP, PDO or mysqli are often used to execute SQL queries:
$stmt = $pdo->prepare("SELECT name FROM users WHERE id = :id");
$stmt->execute(['id' => $userId]);
$user = $stmt->fetch();
Thus, working with SQL queries involves writing, executing, and processing query results to obtain the needed data.