What does the INSERT statement do?a.Fetch data from a databaseb.Insert new rows into a tablec.Insert new columns into a tabled.Insert a new table into a database

Answered: What does the INSERT statement do? a.…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

What does the INSERT statement do?

Fetch data from a database

Insert new rows into a table

Insert new columns into a table

Insert a new table into a database

Expert Solution

Step 1: Introduction:

SQL (Structured Query Language) Statements refer to the various commands and instructions used in SQL to interact with relational databases. SQL is a standardized language for managing and querying data in relational database management systems (RDBMS), and it provides a set of statements for performing different tasks.

Here are some common categories of SQL statements:

1. Data Querying Statements :

SELECT: Used to retrieve data from one or more tables. It allows you to specify which columns to retrieve, conditions for filtering data, and more.

2. Data Manipulation Statements:

INSERT: As discussed earlier, it is used to add new rows of data into a table.
UPDATE: Used to modify existing data in a table based on specified conditions.
DELETE: Used to remove rows from a table based on specified conditions.

3. Data Definition Statements:

CREATE TABLE: Used to define a new table, including specifying the columns, data types, constraints, and indexes.
ALTER TABLE: Used to modify an existing table's structure, such as adding, modifying, or deleting columns.
DROP TABLE: Used to delete an existing table and all its data.
CREATE INDEX: Used to create an index on one or more columns of a table to improve query performance.

4. Data Control Statements:

GRANT: Used to grant specific privileges or permissions to users or roles on database objects.
REVOKE: Used to revoke previously granted privileges from users or roles.

5. Transaction Control Statements:

BEGIN TRANSACTION (or BEGIN): Starts a new transaction.
COMMIT: Saves changes made during the transaction to the database.
ROLLBACK: Undoes changes made during the transaction and restores the database to its previous state.

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