0
MySQL
MySQL is a Relational Database Management System. It was first released in 1995 and is most commonly used with the PHP programming language. MySQL is open source and 100% free to use.
526 Questions
Explain the DDL and DML commands in sql with example?
DDL--Data Definition Language
and Commands for DDL as:
1.CREATE DATABASE--create a new data base
2.ALTER DATABASE---modifies a database
3.CREATE TABLE---create a new table
4.ALTER TABLE---modifies a table
5.DROP TABLE---deletes a table
6.CREATE INDEX---creates an index(search key)
7.DROP INDEX---deletes an index
DML---Data Manipulation Language
Commands from the DML part of SQL:
1.SELECT----extracts data from a database
2.UPDATE--updates data in a database
3.DELETE---deletes data from a database
4.INSERT INTO---insert new data into a database
What is the database not found error in PHP with MySQL?
It would mean the database you are trying to select in your PHP script couldn't be found, you will need to check to see if you are using the correct details.
10 examples of Database Management System?
Ten common software packages that provide DBMS functionality include:
- Ingres
- Microsoft Access
- MongoDB
- MS-SQL Server
- MS FoxPro
- MySQL
- NoSQL
- Oracle
- Postgres
- SQLite
A DBMS, or database Management System, is a collection of programs that enables you to store, modify, and extract information from a database.
Sql query to list all the constraints in the table?
SQL Server – List all Database or Table Constraints
When we execute DML commands like INSERT, UPDATE, and DELETE, we frequently encounter errors because the table has one or more constraints.
Use the sys command.
The query above will show all of the sys fields.
To learn more about data science please visit- Learnbay.co
How do you fix MySQL error 1045?
Error 1045 is access denied with username/password. So you either have the username or password incorrect. It is possible, also, that you are trying to connect from a remote machine to a database to which remote access privilege has not been granted.
The founders of MySQL AB are Michael "Monty" Widenius and David Axmark.
With MySQL data archiving create and deploy effective and consistent policies for managing, securing and storing data from a single console. It helps relocate 50% of the inactive data from your production database to a secure online data archive.
Yes, MySQL is open source and is free to download and install.
You can use the MySQL Installer to install and configure MySQL server on Windows operating system. It provides a simplified installation and configuration process for MySQL products running on Microsoft Windows.
The list of MySQL products includes the following items:
MySQL Server
MySQL Workbench
MySQL Router
MySQL Shell
MySQL for Visual Studio
MySQL Reference Manuals PDF
MySQL connectors (MySQL/Python connector, MySQL/NET connector, etc.)
MySQL database examples.
To get started with MySQL database easily, you can use the comprehensive solution provided by dbForge Studio for MySQL, which allows you to efficiently process data and automate the management of your database objects.
What are the advantages of data verification in database system?
Yalla Zeyd is X2 plus abu Zeyd and Um Zeyd
Zeyd 7AMEL
How do you insertupdate and delete queries in a one form by using php?
It is not possible for an html form to do 4 simultaneous process. What you need to do is create 4 html forms for insert, update, delete, show data on same php page. Use if...elseif....else statements to load alternative forms on the same page and process them according to user input. User doesn't know there are 4 separate forms. Use <?php $_SERVER['PHP_SELF']; ?> to process form & output other forms on same page.
How do you check the data given by the user with database values using PHP from MySQL database?
You could use the string replace attribute but you might have to use Javascript, CGI, ASP or another scripting language to do so.
How do you make an SQL Server login account for MySQL admin and query?
All MySQL user accounts can be made by querying "CREATE '[username]' @ '[server]' IDENTIFIED BY '[password]'", where [username], [server], and [password] should be filled in with appropriate data. The two exceptions to this are usernames "admin" and "dummy" which have no passwords.
Student registration system with a suitable information processing method?
student registration system and its information processing unit
How use update command in mysql?
A simple example of how to use it would be something like this:
UPDATE addresses SET street = 'north' WHERE lastname = 'smith';
There are far far more things that you can do with it than that of course, and I would recommend reading the MySQL documentation for further details.
If you wish to use it in PHP, it can be done with a line like this one:
mysql_query("UPDATE addresses SET street='north' WHERE lastname='smith'");
which will execute the command on the currently selected database.
What are database software available in market?
Available DBMS are DB2, Oracle, Sybase, and Microsoft SQLServer. There are also Microsoft Access, mySQL, FileMaker. Hyperion, hSQL, Firebird, Postgres, and more.
How do you JOIN two tables in MySQL?
You can simply do this:
Say you have two tables - employee and phone
INNER JOIN
select employee.first_name, employee.last_name, phone.home_number from employee, phone where phone.employee_id = employee.employee_id;
OR
select employee.first_name, employee.last_name, phone.home_number from employee join phone on phone.employee_id = employee.employee_id;
LEFT JOIN
select employee.first_name, employee.last_name, phone.mobile_number from employee left join phone on phone.employee_id = employee.employee_id;
RIGHT JOIN
select phone.fax_number, employee.first_name, employee.last_name from phone right join employee on phone.employee_id = employee.employee_id;
How do you select a column named FirstName from a table named Persons?
In order to select a column named FirstName from a table named Persons, you should run the following MySQL query:
SELECT FirstName FROM Persons
What command would you use to delete the parts table from premiere products database?
Remove or Revoke
You use SQL by issuing commands to an SQL server, either directly by you or by a program you are using.
What is a record-based data model?
-> A record based data model is used to specify the overall logical structure of the database.
-> In this model the database consists of a no. of fixed formats of different types.
-> Each record type defines a fixed no. of fields having a fixed length.
-> There are 3 principle types of record based data model. They are :
1. Hierarchical data model.
2. Network data model.
3. Relational data model.
Where would one find a reference manual for a MYSQL Cluster?
If you are new to MYSQL you may find the quick guides very useful for this program. It is the worlds largest database program and a reference manual can be found at MySQL.
What is non-loss decomposition in database?
Nonloss-decomposition is data normalization without the loss of information.
