Data type in MySQL Part - 1



Hello and welcome everyone. In this article, we will learn about Data type and its type. Let’s go.

MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/

C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/ 
Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/

Data type
You optimize your database you should use the type and size of the field in your database table (in MySQL every column in a database table is required to have a name and a data type). A data type is a specifies the possible values for that type, that specifies a particular data type, for example, floating points, integer, varchar, Boolean, date and time, etc.
When creating a table what type of data will be stored.

MySQL has three most important data type
1.   Data and Time
2.   Numeric
3.   String

Data and Time Data type
DATE ()
DATETIME ()
TIMESTAMP ()
TIME ()
YEAR ()
Now let see in details one by one:
DATE ()

Date data type use you need only date information. In MySQL date format is YYYY-MM-DD and date data type range is between ‘1000-01-01’ to ‘9999-12-31’. Date data type storage size is 3 bytes.

MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/


C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/ 
Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/


DATETIME ()

DateTime data type combination of date and time and DateTime format is YYYY-MM-DD HH:MM:SS. DateTime data type range is between ‘1000-01-01 00:00:00’ to ‘9999-12-31 23:59:59’. DateTime data type storage size is 8 bytes.

TIMESTAMP ()

TIMESTAMP data type values are stored as the number of seconds and it converted values from the current time zone to UTC and converted back from UTC to the current time zone when it retrieved. TIMESTAMP format is YYYY-MM-DD HH:MM:SS and its range is 1970-01-01 00:00:01 UTC to 2038-01-09 03:14:07 UTC. TIMESTAMP data type storage size is 4 bytes.

TIME ()

The TIME data type is storing time values. The time format is HH:MM:SS and its range are ‘-838:59:59’ to ‘838:59:59’. TIME data type storage size is 3 bytes.

YEAR ()

The YEAR data type stores an in a 2 digit or a 4 digit format for example YEAR (2) or YEAR (4). There are two types converted range: the first one is 70-99 are converted to 1970-1999 and the second one is 00-69 is converted to 2000-2069. YEAR data type storage size is 1 byte.


In this article, we are learned about Data type and Date and Time data type. We will see other data type (Numeric and String data type) in the next article.
MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/

C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/ 
Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/


Comments

Post a Comment

Popular posts from this blog

ALTER statement in MySQL

Image
Hello and welcome everyone. In this article, we will learn about the ALTER table statement in MySQL. Let’s go. MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/ C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/  Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/ MySQL ALTER command is used to modify the table, view an existing database. When you have completed your database design and after that, you realize some of the information was left out when creating a database. You want to change without losing existing data, and then you can change data using ALTER command. MySQL ALTER command is used to add a column with an existing table, add multiple columns, drop a column, modify a column, rename a column, and rename the table. ALTER command also used to add and drop constraints on the existing table. N
Read more

Order By Clause in MySQL

Image
Hello and welcome everyone. In this article, we will learn about the Order By Clause in MySQL. Let’s go. MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/ C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/  Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/ MySQL Order by clause is used to sort the records or data in ascending or descending order. Order by clause allows us to sort records or data by a single column or multiple columns in ascending or descending order. There are two key using in Order by clause:          ASC: - sorting data or records by ascending order.          DESC: - sorting data or records by descending order. Syntax:          SELECT column_name_1, column_name_2, …          FROM table_name          WHERE condition ORDER BY column_name_1 [ ASC | DESC ], column_name_2 [ ASC
Read more

MySQL Constraint – UNIQUE

Image
C# basic course click on: https://www.udemy.com/learn-csharp-with-sagar-jaybhay/  Web API 2- .Net Core In depth In 5 Hours click on: https://www.udemy.com/web-api-2-net-core-in-depth-in-5-hrs-with-sagar-jaybhay/ Hello everyone in the previous article we learn about MySQL Constraint – NOT NULL and in this article, we will learn UNIQUE constraint with example. Let’s go. What is a UNIQUE key? The MySQL UNIQUE key used to specify that you don’t want to see duplicate data in a given field means all the values in a column are different. In MySQL, UNIQUE key is implemented through a constraint that is called UNIQUE Constraint. MongoDB with .Net Core course link => https://www.udemy.com/mongodb-with-net-core-sagar-jaybhay/ What is a UNIQUE Constraint? MySQL UNIQUE constraint does not allow inserting a duplicate value in a column and each data value of a column that has the unique value. If you add to insert an already existing duplicate value in the unique colum
Read more