database mysql create table code example
Example 1: create database mysql
CREATE DATABASE `mydb`;
CREATE TABLE `my_table`
(
my_table_id INT AUTO_INCREMENT,
my_table_name VARCHAR(30) NOT NULL,
my_foreign_key INT NOT NULL,
my_tb_created TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
my_tb_updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, ,
PRIMARY KEY(my_table_id),
CONSTRAINT fk_name_of_parent_table
FOREIGN KEY(my_foreign_key) REFERENCES parent_table(parent_table_column)
);
SHOW DATABASES;
Example 2: MySQL CREATE TABLE
The CREATE TABLE statement allows you to create a new table in a database.
The following illustrates the basic syntax of the CREATE TABLE statement:
CREATE TABLE [IF NOT EXISTS] table_name(
column_1_definition,
column_2_definition,
...,
table_constraints
) ENGINE=storage_engine;
Let’s examine the syntax in greater detail.
First, you specify the name of the table that you want to create after the CREATE TABLE keywords. The table name must be unique within a database. The IF NOT EXISTS is optional. It allows you to check if the table that you create already exists in the database. If this is the case, MySQL will ignore the whole statement and will not create any new table.
Second, you specify a list of columns of the table in the column_list section, columns are separated by commas.
Third, you can optionally specify the storage engine for the table in the ENGINE clause. You can use any storage engine such as InnoDB and MyISAM. If you don’t explicitly declare a storage engine, MySQL will use InnoDB by default.