Let us first create a table −mysql> create table DemoTable (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    StudentName varchar(40),    StudentMathMarks int,    StudentMySQLMarks int,    status ENUM('ACTIVE', 'INACTIVE') ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('Chris', 45, 67, 'active'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('Bob', 89, 78, 'inactive'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentName, StudentMathMarks, StudentMySQLMarks, status) values('David', 56, 68, 'active'); Query OK, 1 row affected ... Read More

The only difference between BIGINT and BIGINT(20) is for displaying width. The 20 can be used for displaying width.Let us see an example and create a table. Here, we have set BIGINT(20) −mysql> create table DemoTable (    Number bigint(20) zerofill ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values(12); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(123); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(1234); Query OK, ... Read More

Let us first create a table −mysql> create table DemoTable (    Name varchar(40) ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Sam'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Mike'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('Ethan'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Johnson'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected ... Read More

For this, use LEFT() method. For manipulation, we have used the LOCATE() and the REVERSE() method.Let us first create a table −mysql> create table DemoTable (    Title text ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('$/This$is[MySQL]$/MySQL[FirstClass]$MySQL[SecondClass]'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('$/This$is[Java]$/Java[FirstClass]$Java[SecondClass]'); Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------------------------------------------------------+ | Title                       ... Read More

For such string manipulations, you need to use MySQL SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable (    SystemIpAddress text ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('192.168.130.67'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('192.168.130.87'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('192.168.131.47'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable values('192.168.134.50'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('192.168.131.12'); Query OK, 1 row affected (0.21 sec)Display ... Read More

No, there’s no need to insert auto_increment column values, since it begins from 1 and inserts on its own. This is because we have set it as auto increment. Let us first create a table −mysql> create table DemoTable (    EmployeeId int NOT NULL AUTO_INCREMENT,    EmployeeName varchar(30),    EmployeeSalary int,    PRIMARY KEY(EmployeeId) ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('Chris', 56789); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(EmployeeName, EmployeeSalary) values('David', 78909); Query OK, 1 row affected (0.14 sec) mysql> ... Read More

Let us first create a table −mysql> create table DemoTable (    StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Score int ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Score) values(56); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable(Score) values(78); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Score) values(34); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Score) values(55); Query OK, 1 row affected (0.37 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce ... Read More

For this, use FLOOR() function. Here, we will be fetching records like 12.00, 35.00, etc. from a list with records like 5.23, 8.76, 12.00, 22.68, etc. Let us first create a table −mysql> create table DemoTable (    Value DECIMAL(4, 2) ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(54.20); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(55.0); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(7.8); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(9.0); Query OK, ... Read More

Let us first create a table −mysql> create table DemoTable (    Marks int ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(88); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(65); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(98); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(45); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(67); Query OK, 1 row affected (0.33 sec)Display all records from the table using select statement −mysql> select ... Read More

Use DELETE for this. Let us first create a table −mysql> create table DemoTable (    Name varchar(40),    Score1 int ,    Score2 int ); Query OK, 0 rows affected (2.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 56, 76); Query OK, 1 row affected (0.66 sec) mysql> insert into DemoTable values('Chris', 77, 77); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('David', 89, 98); 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 ... Read More