For this, you can use GROUP BY along with aggregate function MAX(). Let us first create a table −mysql> create table DemoTable1964    (    StudentName varchar(20),    StudentAge int    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1964 values('Chris', 23); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1964 values('David', 34); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1964 values('Chris', 27); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1964 values('Sam', 31); Query OK, 1 row affected (0.00 sec) mysql> ... Read More

To create a user and grant permission, the syntax is as follows −create database yourDatabaseName DEFAULT CHARACTER SET utf8; create user `yourUserName` identified by yourPassword; GRANT SELECT ON yourDatabaseName .* TO `yourUserName`; GRANT INSERT ON yourDatabaseName .* TO `yourUserName`; GRANT UPDATE ON yourDatabaseName .* TO `yourUserName`; GRANT DELETE ON yourDatabaseName .* TO  `yourUserName`; GRANT EXECUTE ON yourDatabaseName .* TO `yourUserName`;Here is the query to create user and grant permission −mysql> create database demo_app DEFAULT CHARACTER SET utf8; Query OK, 1 row affected, 1 warning (0.00 sec) mysql> create user `John_123` identified by '123456'; Query OK, 0 rows affected (0.00 sec) ... Read More

For this, you can use SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable1962    (    EmployeeInformation text    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1962 values('101-John-29'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1962 values('102-David-35'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1962 values('103-Chris-28'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1962;This will produce the following output −+---------------------+ | EmployeeInformation | +---------------------+ | 101-John-29   ... Read More

Let us first create a table −mysql> create table DemoTable1961    (    Title text    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1961 values('You_can_remove_the_string_part_only-10001-But_You_can_not_remove_the_numeric_parts'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1961;This will produce the following output −+------------------------------------------------------------------------------------+ | Title                                                                       ... Read More

For this, you can use GROUP_CONCAT(). Use SUM() to add the User Id. Let us first create a table −mysql> create table DemoTable1960    (    StudentId int,    StudentName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1960 values(100, 'Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1960 values(101, 'Bob'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1960 values(102, 'David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1960 values(103, 'Mike'); Query OK, 1 row affected (0.00 sec)Display ... Read More

To create a table name like year (2019), use PREPARE statement. Let us first create a table −mysql> create table DemoTable1959    (    UserName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1959 values('Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1959 values('David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1959 values('Bob'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1959;This will produce the following output −+----------+ | UserName ... Read More

For this, use ZEROFILL and alter the table to begin from the same sequence −alter table yourTableName    change yourColumnName yourColumnName int(3) UNSIGNED ZEROFILL NOT NULL AUTO_INCREMENT PRIMARY KEY;To understand the above syntax, let us first create a table −mysql> create table DemoTable1958    (    UserId int,    UserName varchar(20)    ); Query OK, 0 rows affected (0.00 sec)Here is the query to alter generated sequence number to begin from 001:mysql> alter table DemoTable1958    change UserId UserId int(3) UNSIGNED ZEROFILL NOT NULL AUTO_INCREMENT PRIMARY KEY; Query OK, 0 rows affected (0.00 sec) Records: 0  Duplicates: 0  Warnings: 0Let ... Read More

Let us first create a table −mysql> create table DemoTable1957    (    EmployeeId int,    EmployeeName varchar(20),    EmployeeSalary int    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1957 values(1, 'Chris', 240000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(2, 'Bob', 120000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(3, 'David', 180000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1957 values(4, 'Mike', 650000); Query OK, 1 row affected (0.00 sec)Display all records from the table using ... Read More

Let us first get the current date −mysql> select curdate();This will produce the following output −+------------+ | curdate()  | +------------+ | 2019-12-15 | +------------+ 1 row in set (0.00 sec)Let us first create a table −mysql> create table DemoTable1956    (    ProductId int,    ProductName varchar(20),    CustomerName varchar(20),    ShippingDate date    ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1956 values(101, 'Product-1', 'Sam', '2019-10-11'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1956 values(102, 'Product-2', 'Carol', '2018-12-01'); Query OK, 1 row affected (0.00 sec) ... Read More

Let us first create a table −mysql> create table DemoTable1955    (    UserId int NOT NULL 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 DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1955 values(); Query OK, 1 row affected (0.00 sec)Display ... Read More