SQL Tutorial - How To Create, Drop, and Truncate Table

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SQL Tutorial
Table Management
Add, Remove, and Truncate Tables

Database Basics
Database
Tables
Columns
Rows
In a relational database, data is stored in tables. A table
consists of columns and rows.

CREATE TABLE
The first step to store data in a database is to add a table. To
do this, we use the CREATE TABLE command in SQL.
CREATE TABLE "table_name"
("column 1" "data_type_for_column_1",
"column 2" "data_type_for_column_2"
... )
The syntax for CREATE TABLE is:

CREATE TABLE
For example, the command below,
CREATE TABLE ALL_USERS
(LAST_NAME char(20),
FIRST_NAME char(20));
results in the creation of a table ALL_USERS with two
columns: LAST_NAME and FIRST_NAME, both 20
characters long.

DROP TABLE
One also needs to be able to remove tables from a database,
otherwise database management becomes very difficult. SQL
uses the DROP TABLE command to accomplish this.
The syntax for removing a table is:
DROP TABLE "table_name“;
To drop the ALL_USERS table we previously created, we use
the following SQL:
DROP TABLE ALL_USERS;

TRUNCATE TABLE
To remove all data but keep the table structure, SQL uses the
TRUNCATE TABLE command.
The syntax for TRUNCATE TABLE is:
TRUNCATE TABLE "table_name“;
To truncate the ALL_USERS table we previously created, we
use the following SQL:
TRUNCATE TABLE ALL_USERS;

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SQL Tutorial - How To Create, Drop, and Truncate Table

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