Let us first create a table −mysql> create table DemoTable (    value1 int,    value2 int,    value3 int ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(20, 40, null); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values(40, 40, null); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values(null, null, null); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------+--------+--------+ | value1 | value2 ... Read More

For this, use ORDER BY with a modulus operator. Let us first create a table −mysql> create table DemoTable (    StudentId int,    StudentName varchar(100) ); Query OK, 0 rows affected (1.88 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris'); Query OK, 1 row affected (0.41 sec) mysql> insert into DemoTable values(101, 'Robert'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable values(102, 'David'); Query OK, 1 row affected (0.94 sec) mysql> insert into DemoTable values(103, 'Mike'); Query OK, 1 row affected (0.23 sec)Display all records from the table using ... Read More

You can use an aggregate function SUM() along with IF(). Let us first create a table −mysql> create table DemoTable (    FirstName varchar(100),    LastName varchar(100) ); Query OK, 0 rows affected (2.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Adam', 'Smith'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values('John', 'Smith'); Query OK, 1 row affected (0.36 sec) mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (1.38 sec) mysql> insert into DemoTable values('Bob', 'Doe'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Sam', ... Read More

You can use REGEXP. Let us first create a table −mysql> create table DemoTable (    Name varchar(100) ); Query OK, 0 rows affected (1.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('JohnSmith'); Query OK, 1 row affected (0.73 sec) mysql> insert into DemoTable values('John Doe'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('DavidMiller'); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values('Carol Taylor'); Query OK, 1 row affected (0.27 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following ... Read More

To fetch multiple values wit LIKE, use the LIKE operator along with OR operator. Let us first create a table −mysql> create table DemoTable1027 (    Id int,    Name varchar(100) ); Query OK, 0 rows affected (1.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1027 values(100, 'John'); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable1027 values(20, 'Chris'); Query OK, 1 row affected (0.56 sec) mysql> insert into DemoTable1027 values(200, 'Robert'); Query OK, 1 row affected (0.84 sec) mysql> insert into DemoTable1027 values(400, 'Mike'); Query OK, 1 row affected (0.47 sec)Display all ... Read More

Let us first create a table −mysql> create table DemoTable (    CustomerName varchar(100),    CustomerCountryName varchar(100) ); Query OK, 0 rows affected (0.95 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 'US'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Bob', 'UK'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Carol', NULL); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('David', 'AUS'); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('Mike', NULL); Query OK, 1 row affected (0.18 sec)Display all records ... Read More

You can use concat(). Let us first create a table −mysql> create table DemoTable (    Value int ); Query OK, 0 rows affected (0.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(100); Query ... Read More

For this, you can use LENGTH() along with REPLACE(). Let us first create a table −mysql> create table DemoTable (    Value int ); Query OK, 0 rows affected (1.22 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10002000); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(00000); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(400560); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------+ | Value    | +----------+ | 10002000 ... Read More

For this, you can use IFNULL(). Let us first create a table −mysql> create table DemoTable (    FirstName varchar(100),    LastName varchar(100) ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable values(NULL, 'Taylor'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('David', NULL); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(NULL, 'Miller'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> ... Read More

For this, you can use IFNULL(). Let us first create a table −mysql> create table DemoTable (    Value1 int,    Value2 int ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10, NULL); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(20, 40); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values(3, NULL); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------+--------+ | Value1 | Value2 ... Read More