Found 4378 Articles for MySQL

Replacing numbers on a comma delimited result with MySQL?

AmitDiwan
Updated on 17-Dec-2019 06:27:59

138 Views

For this, use CASE statement along with FIND_IN_SET(). Let us first create a table −mysql> create table DemoTable1629     -> (     -> Month varchar(100)     -> ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command.mysql> insert into DemoTable1629 values('2, 4, 6'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1629 values('1, 3, 5, 12'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1629 values('7, 8, 9, 10'); Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement − mysql> select ... Read More

Select total from a MySQL table based on month

AmitDiwan
Updated on 28-Feb-2020 05:26:08

158 Views

For this, you can use GROUP BY MONTH(). Let us first create a table −mysql> create table DemoTable1628     -> (     -> PurchaseDate date,     -> Amount int     -> ); Query OK, 0 rows affected (1.55 sec)Insert some records in the table using insert command.mysql> insert into DemoTable1628 values('2019-01-10', 1500); Query OK, 1 row affected (0.68 sec) mysql> insert into DemoTable1628 values('2019-10-10', 2000); Query OK, 1 row affected (0.61 sec) mysql> insert into DemoTable1628 values('2019-10-24', 100); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1628 values('2019-11-10', 500); Query OK, 1 row affected ... Read More

Create MySQL datetime column with default 0000-00-00?

AmitDiwan
Updated on 17-Dec-2019 06:27:12

697 Views

To set default, you can use the DEFAULT keyword in MySQL. Let us first create a table −mysql> create table DemoTable    -> (    -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> EmployeeName varchar(20),    -> EmployeeJoiningDate datetime default '0000-00-00 00:00:00'    -> )ENGINE=MyISAM, AUTO_INCREMENT=100; Query OK, 0 rows affected (0.21 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeName) values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(EmployeeName) values('David'); Query OK, 1 row affected (0.04 sec) mysql> insert into DemoTable(EmployeeName) values('Mike'); Query OK, 1 row affected (0.03 sec) mysql> ... Read More

Java – MySQL connection with ipAddress

AmitDiwan
Updated on 17-Dec-2019 06:24:11

647 Views

Set the JDBC MySQL URL in the DriverManager.getConnection to connect with IP Address. Following is the code to connect using IP Address −Exampleimport java.sql.Connection; import java.sql.DriverManager; public class JavaIP {    public static void main(String[] args) {       String hostURL = "jdbc:mysql://192.168.43.144:3306/web?useSSL=false";       Connection con = null;       try {          con = DriverManager.getConnection(hostURL, "root", "123456");          System.out.println("connection successful via ip address");       }       catch (Exception e) {          e.printStackTrace();       }    } }OutputThis will produce the following output −connection successful via ip addressHere is the snapshot of the output −

How to get the count of both present and absent students for a year in MySQL?

AmitDiwan
Updated on 28-Feb-2020 05:31:07

966 Views

For this, you can use IF() along with aggregate function SUM(). Let us first create a table −mysql> create table DemoTable1617     -> (     -> Attendance varchar(20),     -> CurrentYear int     -> ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1617 values('Present', 2019); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1617 values('Absent', 2019); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1617 values('Absent', 2017); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1617 values('Present', 2019); Query ... Read More

UPDATE with logical AND operator in MySQL

AmitDiwan
Updated on 28-Feb-2020 05:34:58

326 Views

For this, you can use AND operator with WHERE clause. Let us first create a table −mysql> create table DemoTable1616     -> (     -> StudentId int,     -> StudentName varchar(20),     -> StudentMarks int     -> ); Query OK, 0 rows affected (0.44 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1616 values(101, 'Chris', 56); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1616 values(102, 'Bob', 87); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1616 values(103, 'David', 56); Query OK, 1 row affected (0.20 sec) ... Read More

MySQL query to get a single value from position of comma-separated string?

AmitDiwan
Updated on 17-Dec-2019 06:19:15

434 Views

For this, use SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable1615    -> (    -> ListOfSubject text    -> ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1615 values('Python, Java, MySQL, MongoDB, C, C++, ASP.net'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select * from DemoTable1615; This will produce the following output −+-----------------------------------------+ | ListOfSubject                           | +-----------------------------------------+ | Python, Java, MySQL, MongoDB, C, ... Read More

Get three records having higher value from MySQL

AmitDiwan
Updated on 17-Dec-2019 06:15:23

66 Views

Let us first create a table −mysql> create table DemoTable1614    -> (    -> StudentName varchar(20),    -> StudentScore int    -> ); Query OK, 0 rows affected (0.78 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1614 values('Adam', 65); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1614 values('Chris', 89); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1614 values('Bob', 58); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1614 values('Sam', 98); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1614 values('Mike', 87); Query OK, 1 ... Read More

Is there a function similar to Oracle's trunc (sysdate) in MySQL?

AmitDiwan
Updated on 17-Dec-2019 06:13:01

697 Views

Yes, you can use DATE() to get only date part in MySQL and you can use CURDATE() to get the current date in MySQL.The current date is as follows −mysql> select curdate(); +------------+ | curdate()  | +------------+ | 2019-10-20 | +------------+ 1 row in set (0.00 sec)Let us first create a table −mysql> create table DemoTable1613    -> (    -> PostingDate datetime    -> ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1613 values('2019-10-20 12:02:45'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1613 values('2018-10-20 12:02:45'); ... Read More

Delete a specific record from a MySQL table by using AND in WHERE clause

AmitDiwan
Updated on 26-Feb-2020 07:08:22

112 Views

MySQL AND is used in WHERE to fetch a record by filtering using multiple conditions. Let us first create a table−mysql> create table DemoTable    -> (    -> Id int,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(101, 'Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(102, 'David'); Query OK, 1 row affected (0.51 sec) mysql> insert into DemoTable values(103, 'Bob'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement ... Read More

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