Differbetween
- How do I alter a database in MySQL?
- What is Alter in MySQL?
- Can we rename a database in MySQL?
- What is the job of alter database command?
- Is Alter DDL or DML?
- How do I select a database in MySQL?
- How do I edit a row in MySQL?
- Is alter a DDL command?
- How do I rename a SQL database?
- How do I quit a MySQL database?
- Where can I find MySQL database name?
- How do I drop a database in MySQL?
How do I alter a database in MySQL?
Alter- syntax
- "ALTER TABLE `table_name`" is the command that tells MySQL server to modify the table named `table_name`.
- "ADD COLUMN `column_name` `data_type`" is the command that tells MySQL server to add a new column named `column_name` with data type `data_type'.
What is Alter in MySQL?
MySQL ALTER statement is used when you want to change the name of your table or any table field. It is also used to add or delete an existing column in a table. The ALTER statement is always used with "ADD", "DROP" and "MODIFY" commands according to the situation.
Can we rename a database in MySQL?
MySQL does not support the renaming of a database through its command interface at the moment, but you can rename the database if you have access to the directory in which MySQL stores its databases. For default MySQL installations this is usually in the Data directory under the directory where MySQL was installed.
What is the job of alter database command?
In SQL 2012 the alter command modifies a database or the file and filegroups which are associated with the database. You can add or remove files from as database, changes the attributes of a database or its files and filegroups, changes the database collation, and sets database options.
Is Alter DDL or DML?
Difference between DDL and DML:
| DDL | DML |
|---|---|
| Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc. | BASIC command present in DML are UPDATE, INSERT, MERGE etc. |
| DDL does not use WHERE clause in its statement. | While DML uses WHERE clause in its statement. |
How do I select a database in MySQL?
To access a specific database, type the following command at the mysql> prompt, replacing dbname with the name of the database that you want to access: use dbname; Make sure you do not forget the semicolon at the end of the statement. After you access a database, you can run SQL queries, list tables, and so on.
How do I edit a row in MySQL?
MySQL UPDATE
- First, specify the name of the table that you want to update data after the UPDATE keyword.
- Second, specify which column you want to update and the new value in the SET clause. ...
- Third, specify which rows to be updated using a condition in the WHERE clause.
Is alter a DDL command?
DDL - which stands for Data Definition Language which comprises SQL commands used for defining the database which includes creating tables, providing specifications, modifying tables and so on. Examples of DDL include CREATE , DROP , ALTER , etc.
How do I rename a SQL database?
Rename a database using SQL Server Management Studio
- In Object Explorer, connect to your SQL instance.
- Make sure that there are no open connections to the database. ...
- In Object Explorer, expand Databases, right-click the database to rename, and then click Rename.
- Enter the new database name, and then click OK.
How do I quit a MySQL database?
Type \q to exit the mysql program. Type the user's password, and then press Enter.
Where can I find MySQL database name?
Show MySQL Databases
The most common way to get a list of the MySQL databases is by using the mysql client to connect to the MySQL server and run the SHOW DATABASES command. If you haven't set a password for your MySQL user you can omit the -p switch.
How do I drop a database in MySQL?
Deleting a MySQL or MariaDB database
First list all databases on your server. Use the command 'SHOW DATABASES;' in the mysql-console like in the example above. Now copy the name of the database you want to delete. To do delete a database you need the command 'DROP DATABASE'.
