To connect Java to MySQL, the Java code is as follows −import java.sql.Connection; import java.sql.DriverManager; public class LostConnectionURLDemo {    public static void main(String[] args){       String JDBCURL="jdbc:mysql://localhost:3306/web?autoReconnect=true";       Connection con=null;        try{           con = DriverManager.getConnection(JDBCURL,"root","123456");           System.out.println("connection is established");        }       catch(Exception e){          e.printStackTrace();       }    } }This will produce the following output −

To sort search results based on substring position, use ORDER BY LOCATE(). Let us first create a table −mysql> create table DemoTable1838      (      Subject varchar(100)      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1838 values('MongoDB MySQL'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1838 values('MySQL Java'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1838 values('JavaWithMySQL'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1838; This will ... Read More

Let us first create a table −mysql> create table DemoTable1837      (      StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,      StudentName varchar(20)      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1837(StudentName) values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1837(StudentName) values('David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1837(StudentName) values('Bob'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1837(StudentName) values('Mike'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement ... Read More

This error occurs when we use TYPE for ENGINE NAME. The error is as follows −mysql> create table DemoTable1836      (      ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY,      ClientName varchar(20)      )Type=MyISAM AUTO_INCREMENT=1; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Type=MyISAM AUTO_INCREMENT=1' at line 5Now, in MySQL 8, you can use ENGINE instead of Type. Let us first create a table −mysql> create table DemoTable1836      (      ClientId int NOT ... Read More

To fetch random rows in MySQL, use ORDER BY RAND(). Let us first create a table −mysql> create table DemoTable1835      (      ListOfIds varchar(20)      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1835 values('10, 20, 30'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1835 values('70, 80, 90'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1835 values('45, 67, 89'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1835 values('98, 96, 49'); Query OK, 1 row affected (0.00 ... Read More

Let us first create a table −mysql> create table DemoTable1833      (      Name varchar(20)      ); Query OK, 0 rows affected (0.00 sec)Alter table −Mysql> alter table DemoTable1833 ADD FULLTEXT(Name); Query OK, 0 rows affected, 1 warning (0.00 sec) Records: 0  Duplicates: 0  Warnings: 1Insert some records in the table using insert command −mysql> insert into DemoTable1833 values('John Doe'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1833 values('Adam Smith'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1833 values('Chris Brown'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1833 ... Read More

Let us create a table and set a column value with type JSONmysql> create table DemoTable1832      (      ListOfNames JSON      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1832(ListOfNames) values('["Sam", "Mike", "Carol"]'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1832(ListOfNames) values('["David", "Bob"]'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1832(ListOfNames) values('["Adam", "John", "Sam"]'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1832; This will produce the following ... Read More

Let us first create a table. Here. We have set UserId column with ZEROFILL and AUTO_INCREMENTmysql> create table DemoTable1831      (      UserId int(7) zerofill auto_increment,      PRIMARY KEY(UserId)      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1831 values(101); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1831 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1831 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1831 values(); Query OK, 1 row affected (0.00 sec)Display all records ... Read More

To delete only specific rows, use MySQL NOT IN(). Let us first create a table −mysql> create table DemoTable1830      (      StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,      StudentName varchar(20)      )AUTO_INCREMENT=101; Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1830(StudentName) values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1830(StudentName) values('David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1830(StudentName) values('Mike'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1830(StudentName) values('Sam'); Query OK, 1 row affected (0.00 ... Read More

Let us first create a table −mysql> create table DemoTable1829      (      Name varchar(20),      isTopper ENUM('YES', 'NO')      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1829 values('Chris', 'yes'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1829 values('David', 'yes'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1829 values('Mike', 'no'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1829 values('David', 'yes'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement ... Read More