Common Table Expressions (CTEs)
WITH clause, se, EK, CTE, DEFINE, ki, ja, sakti, hai — EK, NAMED, TEMPORARY, result, SET, JISE, MAIN, query, mein, EK, REGULAR, table, ki, tarah, REFERENCE, kiya, ja, sakta hai. Subqueries, se, MORE, READABLE, hai, ESPECIALLY, COMPLEX, queries, ke, liye.
Recursive, CTEs, (MySQL 8.0+) SELF-REFERENCING, queries, allow, karte, HAIN — hierarchical, data, (jaise, org, charts, category, trees) traverse, karne, ke, liye, IDEAL, HAIN.
WITH high_value_orders AS (
SELECT user_id, SUM(amount) AS total
FROM orders
GROUP BY user_id
HAVING SUM(amount) > 1000
)
SELECT users.name, high_value_orders.total
FROM users
JOIN high_value_orders ON users.id = high_value_orders.user_id;- WITH clause = CTE, define, karta, hai — named, temporary, result, set
- Complex, queries, ko, readable, banaне, ke, liye, useful, hai
- Recursive CTEs (MySQL 8.0+) = hierarchical, data, traverse, karne, ke, liye
WITH, clause, mein, MULTIPLE, CTEs, comma-separated, DEFINE, ki, ja, sakti, HAIN — HAR, EK, PREVIOUS, CTEs, ko, REFERENCE, kar, sakti, hai, EK, COMPLEX, query, ko, READABLE, STEPS, mein, BREAK, karте, hue.
WITH regional_sales AS (
SELECT region, SUM(amount) AS total FROM sales GROUP BY region
), top_regions AS (
SELECT region FROM regional_sales WHERE total > 100000
)
SELECT * FROM sales WHERE region IN (SELECT region FROM top_regions);Recursive, CTE, EK, "base, case" aur, EK, "recursive, case" se, banti, hai (UNION ALL, se, joined) — org, charts, ya, category, trees, jaise, hierarchical, data, ko, traverse, karne, ke, liye, ideal, hai.