- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Found 4378 Articles for MySQL
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
427 Views
For alias, use the following syntax wherein we are display an alias name −select sum(yourColumnName) as anyAliasName from yourTableName;Let us first create a table −mysql> create table DemoTable1800 ( Salary int ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1800 values(18000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1800 values(32000); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1800 values(50000); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
348 Views
For this, you can use group_concat() along with replace(). Let us first create a table −mysql> create table DemoTable1799 ( EmployeeId varchar(20) ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1799 values('101, 102, 103, 104'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1799 values('106, 109'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1799;This will produce the following output:+-----------------+ | EmployeeId | +-----------------+ | 101, 102, 103, ... Read More
Select some data from a database table and insert into another table in the same database with MySQL
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
554 Views
To insert data from a table to another, use INSERT INTO statement. Let us first create a table −mysql> create table DemoTable1 ( Id int, FirstName varchar(20), Age int ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(101, 'Chris', 24); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1 values(102, 'David', 28); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1;This will produce the following ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
637 Views
For this, you can use TRUNCATE TABLE command. Let us first create a table −mysql> create table DemoTable1796 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(20) ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1796(StudentName) values('Chris Brown'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1796(StudentName) values('David Miller'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1796(StudentName) values('John Doe'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statementmysql> select ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
121 Views
Let us first create a table −mysql> create table DemoTable1795 ( Name varchar(20), DueDate date ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1795 values('John', '2018-07-21'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1795 values('Sam', '2019-10-21'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1795 values('Sam', '2019-01-10'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1795 values('Mike', '2018-12-31'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
105 Views
For this, you can use case statement. Let us first create a table −mysql> create table DemoTable1794 ( Amount int ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1794 values(100); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1794 values(80); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1794 values(320); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1794;This will produce the following output −+--------+ | Amount | ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
1K+ Views
To avoid any issues while running a query, use IFNULL(). Let us first create a table −mysql> create table DemoTable1793 ( StudentFirstName varchar(20), StudentLastName varchar(20) ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1793 values('John', 'Smith'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1793 values('Carol', NULL); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1793 values(NULL, 'Brown'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
63 Views
To select not-null records, use IS NOT NULL property. Let us first create a table −mysql> create table DemoTable1792 ( Name varchar(20) ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1792 values('John Smith'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1792 values(NULL); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1792 values('David Miller'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1792 values(NULL); Query OK, 1 row affected (0.00 sec)Display all records from the table using ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
69 Views
The following syntax will fetch all the values from the column −select * from yourTableName where yourColumnName=0;Let us first create a table −mysql> create table DemoTable1791 ( FirstName varchar(20) ); Query OK, 0 rows affected (0.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1791 values('David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1791 values('John'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1791 values('Carol'); Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −mysql> select * from DemoTable1791;This ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
597 Views
For this, you can use aggregate function sum() along with parameter value for specific column. Let us first create a table −mysql> create table DemoTable1790 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20), Score int ); Query OK, 0 rows affected (0.94 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1790(Name, Score) values('Chris', 45); Query OK, 1 row affected (0.38 sec) mysql> insert into DemoTable1790(Name, Score) values('David', 55); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1790(Name, Score) values('David', 98); Query OK, ... Read More