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Articles by AmitDiwan
Page 827 of 840
How to sort domain names in MySQL?
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 MoreConvert MySQL date format from yyyy-mm-ddThh:mm:ss.sssZ to yyyy-mm-dd hh:mm:ss ?
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 MoreMySQL query to select closest date from today?
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 MoreHow to grant replication privilege to a database in MySQL?
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 MoreFormat MySQL date and convert to year-month-day
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 MoreCreate a table in MySQL and implement TIMESTAMPDIFF()?
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 MoreFor timestamp, which datatype is used in MySQL?
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 MoreMySQL to Implementing OR operator in a WHERE clause?
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 MoreDisplay only the default values set for columns in MySQL
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 MoreHow to extract from datetime column in MySQL by comparing only date and ignoring whitespace?
To extract from datetime column, you can use date() along with trim(). Here, trim() is used to remove whitespace while comparing. Let us first create a table −mysql> create table DemoTable661(Duedate datetime); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable661 values(' 2019-01-21 12:02:21'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable661 values(' 2019-07-11 11:55:59 '); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable661 values('2019-11-21 04:00:59 '); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −mysql> select ...
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