SQL ยท Chapter 7 of 42
SQL INSERT INTO
INSERT adds new rows to a table. You can list columns explicitly or rely on the table's column order.
Best practice: always list columns.
Syntax
INSERT INTO table (col1, col2) VALUES (val1, val2);Single & multiple rows
One VALUES clause per row; separate with commas to insert many rows in a single statement.
INSERT ... SELECT
Copy rows from another query: `INSERT INTO t (a) SELECT a FROM other;`
Example 1 (sql)
INSERT INTO users (name, age, country)
VALUES ('Ana', 25, 'India');Output
1 row insertedAdd a single row.
Example 2 (sql)
INSERT INTO products (name, price) VALUES
('Book', 250),
('Pen', 20),
('Bag', 900);Output
3 rows insertedBulk insert.
Key points
- Always name your target columns.
- Bulk insert with multiple VALUES.
- INSERT INTO ... SELECT copies from another query.
- Auto-increment PKs are usually omitted from the column list.
๐ก Note: Missing columns default to NULL (or the column's DEFAULT value). Required NOT NULL columns must be included.
