For this, you can use replace() along with group_concat(). Here, for empty fields, we are displaying a comma as a separator. Let us first create a table −mysql> create table DemoTable (    Id int,    Number varchar(100) ); Query OK, 0 rows affected (2.03 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10, '456'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(11, '345'); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable values(10, ''); Query OK, 1 row affected (0.63 sec) mysql> insert into DemoTable values(10, '278'); Query ... Read More

For this, you can use ORDER BY DESC with LIMIT. Let us first create a table −mysql> create table DemoTable (    UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    UserName varchar(100) ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(UserName) values('Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(UserName) values('Robert'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(UserName) values('Bob'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(UserName) values('David'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(UserName) ... Read More

Let us first create a table −mysql> create table DemoTable (    Name varchar(100) ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John_Smith'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('Chris Brown'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('John_Doe'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Carol Taylor'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select ... Read More

For this, you can use DISTINCT along with the INSERT INTO SELECT statement. Let us first create a table −mysql> create table DemoTable1 (    Value int ); Query OK, 0 rows affected (1.03 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(50); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1 values(10); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1 values(10); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1 values(60); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1 values(50); Query OK, 1 row ... Read More

Let us first create a table −mysql> create table DemoTable (    UserId int,    UserMessage varchar(100) ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 'Hi'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(2, 'Hello'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(2, 'Good'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(1, 'Nice'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(1, 'Awesome'); Query OK, 1 row affected (0.16 sec) mysql> insert ... Read More

For this, you can use IN() along with ORDER BY FIELD(). Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(100) ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(FirstName) values('Chris'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable(FirstName) values('Robert'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable(FirstName) values('Mike'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(FirstName) values('Sam'); Query OK, 1 row affected (0.12 sec) mysql> insert into ... Read More

Use information_schema.tables to display all the tables. With that, se the database name as well, so that you can display tables only from a specific database.Let us now display all the tables in the database “web” −mysql> select group_concat(table_name) from information_schema.tables where table_schema='web';This will produce the following output −+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | group_concat(table_name) | +------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | demo_table725, demotabe619, demotabe620, demotable211, demotable212, demotable213, demotable214, demotable215, demotable216, demotable217, demotable218, demotable219, demotable220, demotable221, demotable222, demotable223, demotable224, demotable225, demotable226, demotable227, demotable228, demotable229, demotable230, demotable231, demotable232, demotable233, demotable234, demotable235, demotable236, demotable237, demotable238, demotable239, demotable240, demotable241, demotable244, demotable245, demotable246, demotable247, demotable248, demotable249, demotable250, demotable251, demotable252, demotable 253, demotable254, ... Read More

Let us first create a table −mysql> create table DemoTable (    Title text ); Query OK, 0 rows affected (0.86 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('C is a good programming language to start'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Java is good with data structure and algorithm'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Coding is very important'); 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 ... Read More

Let us first create a table −mysql> create table DemoTable (    Id int,    FirstName varchar(100) ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(100, 'Robert'); Query OK, 1 row affected (0.48 sec) mysql> insert into DemoTable values(100, 'Mike'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values(100, 'Sam'); Query OK, 1 row affected (0.48 sec) mysql> insert into DemoTable values(101, 'David'); Query OK, 1 row affected (0.19 sec) mysql> insert ... Read More

Yes, we can add underscore as a table name using backticks around the table name. Following is the syntax −INSERT INTO `yourTableName` values(yourValue1, .......N);Let us first create a table −mysql> create table `DemoTable_1` (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Location varchar(100) ); Query OK, 0 rows affected (1.17 sec)Insert some records in the table using insert command −mysql> insert into `DemoTable_1`(Location) values('C:/myFolder/JavaFiles'); Query OK, 1 row affected (0.20 sec) mysql> insert into `DemoTable_1`(Location) values('E:/AllJarOfJava'); Query OK, 1 row affected (0.17 sec) mysql> insert into `DemoTable_1`(Location) values('C:/ProgramFiles'); Query OK, 1 row affected (0.17 sec)Display all records from ... Read More