DELETE with a clear scope
DELETE removes rows, not the table definition. WHERE controls which rows. Relationships may block deleting referenced records. DROP TABLE removes the whole table structure. Always back up real data before destructive changes.
हिन्दी में समझें
DELETE पंक्तियाँ हटाता है, टेबल का ढाँचा नहीं। WHERE दायरा है। संदर्भित रिकॉर्ड हटाना रुक सकता है। DROP TABLE पूरा ढाँचा हटाता है। असली डेटा का बैकअप रखें।
अभ्यास: बिना order वाले id 6 ग्राहक को हटाएँ। बाकी id और name, id क्रम में दिखाएँ।
Hinglish mein samjhein
DELETE rows hatata hai, table structure nahi. WHERE scope hai. Referenced records delete karna blocked ho sakta hai. DROP TABLE poora structure hatata hai. Real data ka backup lo.
Practice: Customer id 6 delete karo; remaining id,name id sorted dikhao.
A small SQL example
DELETE FROM customers WHERE id=6;
SELECT COUNT(*) AS total FROM customers;Examples use the fictional shop database bundled with the SQL playground: customers, products, orders, order_items and employees. The engine is SQLite; other SQL dialects may differ.
Try this example in the SQL playground →Practise this idea
Delete customer id 6 (who has no orders); show remaining id and name, ordered by id.
Check answer & explanation
DELETE FROM customers WHERE id=6; SELECT id,name FROM customers ORDER BY id;Customer 6 has no related orders in the sample database, so deleting that row does not break a foreign-key relationship. The final query verifies the remaining records.
Stuck in the course? Choose Check answer for either the challenge or quiz. Read the explanation and continue to the next lesson at your own pace.
Check your understanding
DELETE removes…
Check the quiz answer
Rows
DELETE removes rows, not the table definition. WHERE controls which rows. Relationships may block deleting referenced records. DROP TABLE removes the whole table structure. Always back up real data before destructive changes.
References & corrections
Use the official SQLite documentation for full language rules. Read how these lessons are made and checked. Found a mistake? Report it to Excel Keys with this lesson URL and a reproducible example.