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Found 4378 Articles for MySQL
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
1K+ Views
Let us first display all users and host from the table MySQL.user −mysql> select user, host from Mysql.user;This will produce the following output −+------------------+-----------+ | user | host | +------------------+-----------+ | Bob | % | | Charlie | % | | Robert | % | | User2 | % ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
517 Views
Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> FirstName varchar(100) -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1(FirstName) values('John'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1(FirstName) values('Chris'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will produce the following output −+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
635 Views
Yes, we can do that. Let us first create a table −mysql> create table DemoTable -> ( -> StudentName varchar(100), -> StudentAge int -> ); Query OK, 0 rows affected (0.72 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentAge) values(23); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable(StudentName) values('John'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output. NULL will get inserted for the skipped column values −+-------------+------------+ | StudentName | StudentAge ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13517/profile/60_82215-1512649681.jpg)
573 Views
For this, use BETWEEN operator in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Start int, -> End int -> ); Query OK, 0 rows affected (0.91 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Start, End) values(100, 200); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Start, End) values(400, 500); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Start, End) values(210, 350); Query OK, 1 row affected (0.11 sec)Display all ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13517/profile/60_82215-1512649681.jpg)
348 Views
To add a new column to an existing table, use ADD. With that, to add a new index, use the ADD INDEX(). Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Name varchar(100), -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.69 sec)Let us check the description of the table −mysql> desc DemoTable;This will produce the following output −+-------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+--------------+------+-----+---------+----------------+ | Id ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
87 Views
Let us first create a table −mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT, -> PRIMARY KEY(StudentId) -> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command. Here, we have inserted a value, but since it is AUTO_INCREMENT, therefore, the default value would be visible −mysql> insert into DemoTable(StudentId) values(0); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output. The default AUTO_INCREMENT value 1 as the first value is visible ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
300 Views
Following is the syntax executing the plus (+) operator −update yourTableName set yourColumnName3=(yourColumnName1+yourColumnName2)The above syntax is only for plus operator. You need to change symbol like -, *, / for other operations. Let us first create a table −mysql> create table DemoTable -> ( -> Number1 int, -> Number2 int, -> AddResult int, -> MinusResult int, -> MultiplyResult int, -> DivideResult int -> ); Query OK, 0 rows affected (0.89 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Number1, Number2) values(40, 20); Query OK, 1 row affected (0.16 ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
95 Views
For the current day, you can use CURDATE() method. Let us first create a table −mysql> create table DemoTable -> ( -> DueDate date -> ); Query OK, 0 rows affected (1.35 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-06-14' ); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable values('2019-06-15'); Query OK, 1 row affected (0.64 sec) mysql> insert into DemoTable values('2019-06-16'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('2018-01-16'); Query OK, 1 row affected (0.29 sec) mysql> insert into ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13518/profile/60_31598-1537784993.jpg)
501 Views
Use if() method for this. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Number1 int, -> Number2 int -> ); Query OK, 0 rows affected (1.15 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Number1, Number2) values(10, 20); Query OK, 1 row affected (0.41 sec) mysql> insert into DemoTable(Number1, Number2) values(0, 32); Query OK, 1 row affected (0.38 sec) mysql> insert into DemoTable(Number1, Number2) values(40, 0); Query OK, 1 row affected (0.21 sec) mysql> insert ... Read More
![Naveen Singh](https://www.tutorialspoint.com/assets/profiles/13517/profile/60_82215-1512649681.jpg)
1K+ Views
Let us first create a table −mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(12); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(14); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(19); Query OK, 1 row affected (0.14 sec) ... Read More