HTML
CSS
PHP
JavaScript
SQL
Bootstrap
Solidity
jQuery
Git
Chrome DevTools
C++
PythonContents
SQL Date Functions: Main Tips
- Keeping the queries simple to maintain do not use components of time in the dates.
- When you only use the date part in your data the queries will be just fine. As soon as you involve a time part it complicates things.
- Most important thing while using dates is to make sure of the format you are using and the format your database date column is using are the same.
MySQL Date Functions
Most popular functions list of MySQL:
| Function | Description |
|---|---|
| NOW() | Brings back the present date/time |
| CURDATE() | Brings back the present date |
| CURTIME() | Brings back the present time |
| DATE() | Pulls out the date piece of a date/time |
| EXTRACT() | Brings back a single piece of a date/time |
| DATE_ADD() | Inserts a defined time interval to a date |
| DATE_SUB() | Replaces a defined time interval from a date |
| DATEDIFF() | Brings back the amount of days between two dates |
| DATE_FORMAT() | Shows the date/time in various formats |
Pros Main Features
- Simplistic design (no unnecessary information)
- High-quality courses (even the free ones)
- Variety of features
- Nanodegree programs
- Suitable for enterprises
- Paid certificates of completion
Pros Main Features
- Professional service
- Flexible timetables
- A variety of features to choose from
- Professional certificates of completion
- University-level courses
- Multiple Online degree programs
Pros Main Features
- Great user experience
- Offers quality content
- Very transparent with their pricing
- Free certificates of completion
- Focused on data science skills
- Flexible learning timetable
SQL Server Date Functions
Most popular integrated functions list of SQL Server:
| Function | Description |
|---|---|
| GETDATE() | Brings back the present date and time |
| DATEPART() | Brings back a single piece of a date/time |
| DATEADD() | Inserts or replaces a defined time interval from a date |
| DATEDIFF() | Brings back the time between two dates |
| CONVERT() | Shows the date/time in various formats |
SQL Date: Data Types
MySQL has the data types listed below for containing a date, date/time values:
- DATE - formatting YYYY-MM-DD
- DATETIME - formatting: YYYY-MM-DD HH:MI:SS
- TIMESTAMP - formatting: YYYY-MM-DD HH:MI:SS
- YEAR - formatting YYYY or YY
SQL Server has the data types listed below for containing a date, date/time values:
- DATE - formatting YYYY-MM-DD
- DATETIME - formatting: YYYY-MM-DD HH:MI:SS
- SMALLDATETIME - formatting: YYYY-MM-DD HH:MI:SS
- TIMESTAMP - formatting: a unique digit
SQL Working with Dates
We will be using the table "Order":
| ID | Name | Count | Price | Date |
|---|---|---|---|---|
| 1 | Apple | 120 | 11.9 | 2017-08-18 |
| 2 | Milk | 50 | 9.1 | 2016-12-19 |
| 3 | Bread | 60 | 15.4 | 2017-06-21 |
| 3 | Water | 150 | 12.3 | 2017-07-10 |
| 3 | Chocolate | 85 | 21.9 | 2016-12-25 |
Then we pick out the data records from the column "Date" with "2009-10-10" in the table "Order":
The end result:
| ID | Name | Count | Price | Date |
|---|---|---|---|---|
| 3 | Chocolate | 85 | 21.9 | 2016-12-25 |
Latest Udacity Coupon Found:
Verified STAFF PICK
75% OFF COURSES
Udacity Black Friday Offer
The best time to save on Udacity courses is now - follow this coupon to access a 75% Udacity Black Friday discount & enjoy learning at a very low cost!
Expiration date: 28/02/2021
3176 People Used
Only 97 Left