To sort domain names, use the ORDER BY SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable670(DomainName text); Query OK, 0 rows affected (0.77 sec)Insert some records in the table using insert command. Here, we are inserting domain names −mysql> insert into DemoTable670 values('www.facebook.com'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable670 values('www.google.com'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable670 values('www.amazon.com'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable670;This will produce the following output −+------------------+ | DomainName       ... Read More

For this, use ORDER BY ISNULL(). Let us first create a table −mysql> create table DemoTable669 (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentScore int ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable669(StudentScore) values(45) ; Query OK, 1 row affected (0.80 sec) mysql> insert into DemoTable669(StudentScore) values(null); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable669(StudentScore) values(89); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable669(StudentScore) values(null); Query OK, 1 row affected (0.15 sec)Display all records from the table using select ... Read More

Let us first create a table −mysql> create table DemoTable668(JoiningDate varchar(200)); Query OK, 0 rows affected (0.97 sec)Insert some records in the table using insert command. We have inserted date in the format yyyy-mm-ddThh:mm:ss.sssZ −mysql> insert into DemoTable668 values('2001-01-10T06:20:00.000Z'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable668 values('2019-07-20T04:00:00.000Z'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable668 values('2016-02-12T05:10:50.000Z'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable668;This will produce the following output −+--------------------------+ | JoiningDate             | +--------------------------+ | ... Read More

Let’s say the current date is 2019-07-25. We will now see an example and create a table where ShippingDate is added in the table.Let us first create a table −mysql> create table DemoTable667(ShippingDate datetime); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable667 values('2019-01-31'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable667 values('2019-07-19'); Query OK, 1 row affected (0.69 sec) mysql> insert into DemoTable667 values('2019-07-23'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable667 values('2019-08-24'); Query OK, 1 row affected (0.15 sec)Display all records from ... Read More

To grant replication privilege, use GRANT REPLICATION SLAVE ON.First list all the user names along with host from MySQL.user table −mysql> select user, host from mysql.user;This will produce the following output −+------------------+-----------+ | user             | host | +------------------+-----------+ | Bob              | % | | Charlie          | % | | Robert           | % ... Read More

Let us first create a table −mysql> create table DemoTable666(AdmissionDate varchar(200)); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable666 values('Sat, 20 Jul 2019 04:29:35'); Query OK, 1 row affected (1.12 sec) mysql> insert into DemoTable666 values('Fri, 02 Oct 2018 12:19:15'); Query OK, 1 row affected (1.05 sec) mysql> insert into DemoTable666 values('Sun, 01 Aug 2016 11:10:05'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable666 values('Fri, 06 Nov 2015 04:06:05 -0500'); Query OK, 1 row affected (0.24 sec)Display all records from the table using select statement −mysql> ... Read More

The TIMESTAMPDIFF() calculates the difference between two dates or datetime expressions. Let us first create a table −mysql> create table DemoTable665(    PunchInTime datetime,    PunchOutTime datetime,    Details INT(11) AS (ABS(TIMESTAMPDIFF(second, PunchInTime, PunchOutTime))) )ENGINE=MyISAM; Query OK, 0 rows affected (0.23 sec)Insert some records in the table using insert command −mysql> insert into DemoTable665(PunchInTime, PunchOutTime) values('2019-09-21 9:30:10', '2019-09-21 04:34:56'); Query OK, 1 row affected (0.05 sec) mysql> insert into DemoTable665(PunchInTime, PunchOutTime) values('2019-11-11 10:00:20', '2019-11-11 05:30:16'); Query OK, 1 row affected (0.04 sec)Display all records from the table using select statement −mysql> select *from DemoTable665;This will produce the following output −+---------------------+---------------------+---------+ ... Read More

The TIMESTAMP data type is used for values containing both date and time parts. Let us first create a table −mysql> create table DemoTable662(    UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, UserName varchar(100), UserPostDate datetime ); Query OK, 0 rows affected (0.50 sec)Following is the query for valid default timestamp values −mysql> alter table DemoTable662 MODIFY COLUMN UserPostDate TIMESTAMP NOT NULL DEFAULT current_timestamp; Query OK, 0 rows affected (1.81 sec) Records: 0 Duplicates: 0 Warnings: 0Let us check the description of table once again −mysql> desc DemoTable662;This will produce the following output −+--------------+--------------+------+-----+-------------------+----------------+ | Field        | ... Read More

The OR operator gives true result when any one operand is true. Let us now see an example and create a table −mysql> create table DemoTable663(ClientId int, ClientName varchar(100), ClientAge int); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable663 values(100, 'Chris', 45); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable663 values(101, 'Robert', 29); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable663 values(102, 'John', 45); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable663 values(103, 'Chris', 35); Query OK, 1 row affected ... Read More

Let us first create a table and set default values −mysql> create table DemoTable803(UserId int DEFAULT 101, UserName varchar(100) DEFAULT 'Chris'); Query OK, 0 rows affected (1.18 sec)Insert some records in the table using insert command. For the values we are not inserting, the default values will get set automatically −mysql> insert into DemoTable803 values(102, 'Chris'); Query OK, 1 row affected (0.34 sec) mysql> insert into DemoTable803(UserName) values('Mike'); Query OK, 1 row affected (0.48 sec) mysql> insert into DemoTable803(UserId) values(103); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable803 values(); Query OK, 1 row affected (0.22 sec) mysql> ... Read More