Found 4378 Articles for MySQL

What is the fastest way to insert a large number of rows into a MySQL table?

AmitDiwan
Updated on 26-Dec-2019 05:57:54

180 Views

The syntax for the fastest way is given below. Here, we have used INSERT INTO just once and formed an optimized way −insert into yourTableName values(NULL, yourValue1', yourValue2), (NULL, yourValue1', yourValue2), ....N;Let us first create a table −mysql> create table DemoTable1839      (      ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY,      ClientName varchar(20),      ClientAge int      ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1839 values(NULL, 'Chris', 29), (NULL, 'Chris', 29), (NULL, 'Chris', 29), (NULL, 'Chris', 29), (NULL, 'Chris', 29), (NULL, 'Chris', ... Read More

How to connect Java to MySQL?

AmitDiwan
Updated on 24-Dec-2019 07:58:15

394 Views

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 −

Sort search results based on substring position in MySQL

AmitDiwan
Updated on 24-Dec-2019 07:55:43

178 Views

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

How to get a specific column record from SELECT query in MySQL?

AmitDiwan
Updated on 24-Dec-2019 07:54:20

365 Views

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

Fix MySQL Error #1064 - You have an error in your SQL syntax… near 'TYPE=MyISAM?

AmitDiwan
Updated on 24-Dec-2019 07:52:21

623 Views

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

How to fetch random rows in MySQL with comma separated values?

AmitDiwan
Updated on 24-Dec-2019 07:51:07

161 Views

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

Select rows containing a string in a specific column with MATCH and AGAINST in MySQL

AmitDiwan
Updated on 24-Dec-2019 07:49:58

194 Views

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

Insert JSON into a MySQL table?

AmitDiwan
Updated on 24-Dec-2019 07:48:58

2K+ Views

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

Set custom Auto Increment with ZEROFILL in MySQL

AmitDiwan
Updated on 24-Dec-2019 07:47:56

604 Views

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

Delete only specific rows in a table with MySQL

AmitDiwan
Updated on 24-Dec-2019 07:46:55

342 Views

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

Advertisements