“How to use the datetime type in the database?”

2 years ago
Noah Thompson
2 minutes

In databases, the datetime type is used to store values of both dates and times. Most databases represent datetime values as a combination of dates and times, allowing for precision down to seconds or even finer levels, with specific formats and usage varying slightly between systems.

Here are some common examples of how datetime types are used in databases:

  1. MySQL is a popular relational database management system.

In MySQL, the format of the datetime type is “YYYY-MM-DD HH:MM:SS”.

Create a table and insert a value of type datetime.

Create a table named mytable with columns id (integer) as the primary key and created_at (datetime).

Add a new record to my table with an ID of 1 and a creation date of January 1st, 2022 at 10:00:00.

Retrieve the values of datetime type in the table.

Retrieve the “created_at” column from the table named “mytable”.

  1. PostgreSQL is a popular relational database management system.

In PostgreSQL, the format of datetime type is “YYYY-MM-DD HH:MM:SS”.

Create a table and insert a value of datetime type.

Create a table named “mytable” with columns for id (auto-incrementing primary key) and created_at (timestamp).

Add a record to mytable with an id of 1 and a creation date of ‘2022-01-01 10:00:00’.

Search for values of type datetime in the table.

Retrieve the created_at column from mytable.

  1. Database management system developed by Microsoft.

In SQL Server, the datetime type is formatted as “YYYY-MM-DD HH:MM:SS”.

Create a table and insert a value of datetime type:

Generate a table named mytable with columns id (integer, primary key) and created_at (date and time).

Add a record to mytable with the id of 1 and the created_at date of ‘2022-01-01 10:00:00’.

Get the values of datetime type in the table.

Show the creation timestamp from mytable.

Here are some common examples of how the datetime type is used in databases. The specific usage may vary depending on the type of database you are using. You can refer to the corresponding documentation for more detailed information based on the type of database you are using.

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