Use i.e. not equal in MySQL to exclude a specific row from a table. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int,    -> FirstName varchar(100)    -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 'John'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(2, 'Chris'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(3, 'Robert'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable ... Read More

For this, you can use GROUP BY HAVING clause. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Subject varchar(100)    -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 ... Read More

For this, you can use concat() function from MySQL. Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Name varchar(20),    -> Subject varchar(100)    -> ); Query OK, 0 rows affected (17.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Subject) values('John', 'MySQL'); Query OK, 1 row affected (1.19 sec) mysql> insert into DemoTable(Name, Subject) values('Chris', 'SQL Server'); Query OK, 1 row affected (0.88 sec) mysql> insert into DemoTable(Name, Subject) values('Robert', 'MongoDB'); Query OK, 1 row affected ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Name) values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name) values('David'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name) values('Bob'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Name) ... Read More

If given a string containing a path to a file, the PHP basename() function will return the base name of the file. To get its equivalent in MySQL, you can use SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable    -> (    -> Location varchar(200)    -> ); Query OK, 0 rows affected (1.02 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('C:\Web\Sum.java'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('E:\WebDevelopment\Image1.png'); Query OK, 1 row affected (0.42 sec)Display all records from the table using select statement ... Read More

Let us first create a table −mysql> create table DemoTable    -> (    -> Name varchar(100)    -> ); Query OK, 0 rows affected (0.85 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(NULL); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(NULL); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('David'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+-------+ | Name ... Read More

Yes, we can do that using the CASE statement. Let us first create a table −mysql> create table DemoTable    -> (    -> isMarried boolean    -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.19 sec)Display all records from the table ... Read More

To convert time to seconds, use the TIME_TO_SEC() method. Let us first create a table −mysql> create table DemoTable    -> (    -> ArrivalTime time    -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('04:10:00'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('05:20:50'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('06:40:10'); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+-------------+ | ArrivalTime | +-------------+ | 04:10:00 ... Read More

Following is the syntax −select table_name, create_time from information_schema.TABLES where table_schema = 'yourDataBaseName' order by CREATE_TIME desc limit 1;Let us create the first table (Time: 2019-06-10 16:40:51) −mysql> create table DemoTable1    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentName varchar(100),    -> StudentAge int    -> ); Query OK, 0 rows affected (0.59 sec)We will now create the second table, let’s say after 5 minutes −mysql> create table DemoTable2    -> (    -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> StudentName varchar(100),    -> StudentAge int    -> ); Query ... Read More

To get the current size of a table, use the following that will display details about a table including the size −show table status like ‘yourTableName’\GLet us first create a table −mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> CustomerName varchar(20),    -> CustomerAge int,    -> CustomerCountryName varchar(20)    -> ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(CustomerName, CustomerAge, CustomerCountryName) values('John', 24, 'US'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable(CustomerName, CustomerAge, CustomerCountryName) ... Read More