For this, use sub query along with WHERE clause while using the MySQL UPDATE command. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.82 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(250, 'David'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values(150, 'Mike'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select ... Read More

You can use CHAR_LENGTH() along with the WHERE clause. Let us first create a table −mysql> create table DemoTable    -> (    -> FullName varchar(50)    -> ); Query OK, 0 rows affected (1.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris Brown'); Query OK, 1 row affected (0.40 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 row affected (0.91 sec) mysql> insert into DemoTable values('Robert Miller'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values('John Smith'); Query OK, 1 row affected (0.89 sec)Display all records from the ... Read More

To split a column, you need to use SUBSTRING_INDEX() in MySQL. Let us first create a table −mysql> create table DemoTable    -> (    -> Name varchar(40)    -> ); Query OK, 0 rows affected (1.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John_Smith'); Query OK, 1 row affected (0.36 sec) mysql> insert into DemoTable values('Carol_Taylor'); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable values('David_Miller'); Query OK, 1 row affected (0.54 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------------+ ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> JoiningDate datetime    -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2015-01-21'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('2017-04-02'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('2018-12-31'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------------+ | JoiningDate         | +---------------------+ | 2015-01-21 00:00:00 ... Read More

Yes, it is possible using the # symbol. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY , # Creating a sequence Number    -> FirstName varchar(20), # Creating a column to store name    -> Age int # creating a column to store an age    -> ); Query OK, 0 rows affected (1.43 sec)Above, we have set comments using the # symbol. Insert some records in the table using insert command. We will set comments in insert statement as well using the same # symbol ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Marks1 int,    -> Marks2 int,    -> Marks3 int    -> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Marks1, Marks2, Marks3) values(45, 67, 34); Query OK, 1 row affected (0.33 sec) mysql> insert into DemoTable(Marks1, Marks2, Marks3) values(89, 87, 56); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Marks1, Marks2, Marks3) values(87, 56, 54); Query OK, 1 row affected (0.31 sec)Display ... Read More

For this, you can use GROUP BY along with the ORDER BY clause. Let us first create a table &mins;mysql> create table DemoTable    -> (    -> URL varchar(40),    -> DomainName varchar(20),    -> SearchTimes int    -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('www.gmail.com', 'gmail.com', 4); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values('www.google.com', 'google.com', 3); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values('www.gmail.com', 'gmail.com', 9); Query OK, 1 row affected (0.15 sec) mysql> insert ... Read More

Use SELECT ENGINE to display the storage engine name. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Name varchar(20),    -> Age int,    -> CountryName varchar(20)    -> ); Query OK, 0 rows affected (0.63 sec)Here is the Java code to get the storage engine using JDBC −Exampleimport java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class GetTheStorageEngine {    public static void main(String[] args) {       String hostURL = "jdbc:mysql://localhost:3306/web?useSSL=false";       Connection con = null;       ... Read More

To get the last second of a date in MySQL, use the INTERVAL command. Let us first create a table −mysql> create table DemoTable    -> (    -> JoiningDatetime datetime,    -> DueDatetime datetime    -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(JoiningDatetime) values('2019-11-03 12:34:54'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(JoiningDatetime) values('2019-10-04 12:34:54'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------------+-------------+ | JoiningDatetime   ... Read More

You can use ORDER BY TRIM(). Let us first create a table −mysql> create table DemoTable    -> (    -> Title text    -> ); Query OK, 0 rows affected (1.09 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('MongoDB is a no SQL database'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('The MySQL is a relational database'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('The Java language is good'); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable values('Python is good language'); Query ... Read More