DML: SELECT ALL

Overview

SQL, or Structured Query Language, is a standard language for managing data in relational databases. DML, or Data Manipulation Language, is a subset of SQL and includes commands that allow you to manipulate data in a database. This typically includes operations like insert, delete, update, and select.

The SELECT ALL statement is a DML command in SQL that is used to fetch all the data from a database table. Here’s how you can use the command:

SELECT ALL * FROM table_name;

In this command, * is a wildcard for “all columns”. The FROM clause specifies the table from where the data should be fetched.

Examples

Let’s consider a database table employee with the following data:

id	first_name	last_name	age	department
1	John	Doe	30	IT
2	Jane	Doe	32	HR
3	Jim	Smith	45	Sales
4	Jill	Johnson	25	Marketing
5	Jack	Brown	35	IT

To fetch all the data from this table, you can use the SELECT ALL statement as follows:

SELECT ALL * FROM employee;

This will return:

id	first_name	last_name	age	department
1	John	Doe	30	IT
2	Jane	Doe	32	HR
3	Jim	Smith	45	Sales
4	Jill	Johnson	25	Marketing
5	Jack	Brown	35	IT

Note that SELECT ALL is the same as SELECT - the ALL keyword is optional and is generally omitted in practice.

DML: SELECT ALL

Overview

Examples

Further Readings