Basic MySQL Commands

In this post, I will walk through some basic MySQL commands used in database testing.

Connect to a database

https://www.testingdocs.com/working-with-mysql-command-line/

Create Table

To create a table, you must use the CREATE TABLE command and specify the table name and fields. The following command creates the department:

CREATE TABLE department (
dept_name char(20) NOT NULL,
dept_number numeric(1) NOT NULL,
mgrSSN numeric(9) NOT NULL,
mgrStartDate date NOT NULL,
PRIMARY KEY (dept_number),
UNIQUE (dept_name)
);

DESCRIBE Command

We can check the structure of a table with the help of DESCRIBE command. The command lets you view a table
structure.

mysql> DESCRIBE department;

mysql> DESC dept;

Tip

Note that we have written SQL keywords in capital letters. It is a coding standard of writing an SQL query. This is to enhance the readability of the SQL query to others. SQL is NOT case sensitive.

INSERT

Since you’ve created a table, you can begin inserting data to it. The
INSERT command is shown below to add a record to the table. The values must be listed in exactly the same order as the fields. Each value is separated by a comma, and all VARCHAR & CHAR data type values must be enclosed in single quotation marks.

INSERT INTO department VALUES
(‘Quality Assurance’,1,111223333,’1994-05-24′);