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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to get the first day of next month in MySQL?
With the help of following MySQL query, we can get the first day of next month −mysql> SELECT DATE_FORMAT(CURDATE() + INTERVAL 1 MONTH,'%Y-%m-01') AS 'FIRST DAY OF NEXT MONTH'; +-------------------------+ | FIRST DAY OF NEXT MONTH | +-------------------------+ | 2017-11-01 | +-------------------------+ 1 row in set (0.00 sec)
Read MoreHow can we create a new MySQL table by selecting specific column/s from another existing table?
As we know that we can copy the data and structure from an existing table by CTAS script. If we want to select some specific column/s from another table then we need to mention them after SELECT. Consider the following example in which we have created a table named EMP_BACKUP1 by selecting a specific column ‘name’ from already existing table ‘Employee’ −mysql> Create table EMP_BACKUP1 AS Select name from employee; Query OK, 3 rows affected (0.25 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> Select * from EMP_BACKUP1; +--------+ | name | +--------+ | Ram | | ...
Read MoreHow can we copy data with some condition/s from existing MySQL table?
As we know that we can copy the data and structure from an existing table by CTAS script. If we want to copy data with some condition/s then we need to use WHERE clause with CTAS script. Consider the example below −mysql> Create table EMP_BACKUP2 AS SELECT * from EMPLOYEE WHERE id = 300 AND Name = 'Mohan'; Query OK, 1 row affected (0.14 sec) Records: 1 Duplicates: 0 Warnings: 0 mysql> Select * from EMP_BACKUP2; +------+-------+ | Id | Name | +------+-------+ | 300 | Mohan | +------+-------+ 1 row in set (0.00 sec)In the example ...
Read MoreHow can we get a list of columns in an existing MySQL table?
Suppose if we forgot the names of the columns in an existing table then we can use SHOW COLUMNS statement as follows to get the list of columns −mysql> SHOW COLUMNS from Employee\G *************************** 1. row *************************** Field: Id Type: int(11) Null: YES Key: Default: NULL Extra: *************************** 2. row *************************** Field: Name Type: varchar(20) Null: YES Key: Default: NULL Extra: 2 rows in set (0.07 sec)In the example above, we got the list of columns of ‘Employee’ table with the help of SHOW COLUMNS statement.
Read MoreHow to get last day of the next month in MySQL?
With the help of following MySQL query, we can get the last day of next month −mysql> SELECT LAST_DAY(now() + INTERVAL 1 MONTH) AS 'LAST DAY OF NEXT MONTH'; +------------------------+ | LAST DAY OF NEXT MONTH | +------------------------+ | 2017-11-30 | +------------------------+ 1 row in set (0.00 sec)
Read MoreIn which format Year(2) or Year(4) MySQL will return the value of year from date '0000-00-00'?
Suppose if we have stored a date value as ‘0000-00-00’ in MySQL table then on extracting year value from such kind of date, MySQL will return 0. It would not be in either Year(2) or Year(4) format. To understand it we are using the following data from ‘detail_bday’ table −mysql> Select * from detail_bday; +----+---------+------------+ | Sr | Name | Birth_Date | +----+---------+------------+ | 1 | Saurabh | 1990-05-12 | | 2 | Raman | 1993-06-11 | | 3 | Gaurav | 1984-01-17 | | 4 | Rahul | 1993-06-11 | | 5 | Sonia ...
Read MoreExam Guidance for CAT (Common Admission Test)
In a world obsessed with the word ‘Management’, MBA has become one of the most sought after degrees. Management and entrepreneurship often go hand-in-hand. Most of the startup CEOs and corporate honchos are MBA degree holders. CAT which stands for Common Admission Test is a much bandied about entrance exam especially when it comes to aspirants. To make a mark for themselves and subsequently join elite institutions such as Indian Institutes of Managements, Faculty of Management Studies etc., aspirants have to score a decent percentile in CAT. With the number of students taking CAT escalating to new heights, the sense ...
Read MoreFacebook introduces video as your profile pic!
Now you can upload a 7-second video as your profile pic. Isn’t that great? You can upload a fun-filled video or just a formal introduction in just that small little profile space describing you.Along with the profile video, you can now, highlight your bio-data with a 100-character bio field.And we have an updated mobile-centric design with centered profile photos. You want more? Facebook has Big sections for photos and friends, temporary profile pics, option to pin feature photos to the top of the profile! What more can you ask for?This helps you to highlight the most important things in your ...
Read MoreWhat do you mean by default MySQL database for the user?
Actually, there is no default database for the user. But we have default database for the current session. It can be seen from the following query −mysql> Select Database(); +------------+ | Database() | +------------+ | sample | +------------+ 1 row in set (0.00 sec)The above result set shows that we are using ‘sample’ database currently. It is set for the current session. We can set another database, with the help of USE statement, also for the current session as follows −mysql> USE query; Database changed mysql> Select Database(); +------------+ | Database() | +------------+ | query ...
Read MoreHow can we provide a date with only year (zero months & zero days) value in MySQL?
We can store a date with only year value and have zero months as well as zero-days in MySQL table by disabling NO_ZERO_IN_DATE mode. If this mode is enabled then MySQL will count such kind of date as invalid date and stores all zeros.mysql> Insert into year_testing (OrderDate) values('2017:00:00'); Query OK, 1 row affected (0.09 sec) mysql> select * from year_testing; +------------+ | OrderDate | +------------+ | 2017-00-00 | +------------+ 1 row in set (0.00 sec) mysql> SET sql_mode = 'NO_ZERO_IN_DATE'; Query OK, 0 rows affected (0.00 sec) mysql> Insert into year_testing(OrderDate) values('2017:00:00'); Query OK, 1 row ...
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