How to create a database in mariadb
How do I create a database in MariaDB?
Create a new database: MariaDB> create database DATABASE_NAME; Create a new user (only with local access) and grant privileges to this user on the new database: MariaDB> grant all privileges on DATABASE_NAME.
What are the steps to create a database?
The design process consists of the following steps:
- Determine the purpose of your database.
- Find and organize the information required.
- Divide the information into tables.
- Turn information items into columns.
- Specify primary keys.
- Set up the table relationships.
- Refine your design.
- Apply the normalization rules.
How do I import a database into Sqlyog community?
To import connections go to Tools->Export/Import Connection Details->Import Connections. Click Open File->select the file to be imported and click on import.
How do I import a database into Workbench?
Importing a database from a file
To import a file, open Workbench and click on + next to the MySQL connections option. Fill in the fields with the connection information. Once connected to the database go to Data Import/Restore. Choose the option Import from Self-Contained File and select the file.
How do I import data into MySQL workbench?
Importing CSV file using MySQL Workbench
The following are steps that you want to import data into a table: Open table to which the data is loaded. Review the data, click Apply button. MySQL workbench will display a dialog “Apply SQL Script to Database”, click Apply button to insert data into the table.
How do I import and export a database in MySQL workbench?
Create a backup using MySQL Workbench
- Connect to your MySQL database.
- Click Server on the main tool bar.
- Select Data Export.
- Select the tables you want to back up.
- Under Export Options, select where you want your dump saved.
- Click Start Export.
- You now have a backup version of your site.
What Cannot have a trigger associated with it?
Since triggers execute as part of a transaction, the following statements are not allowed in a trigger: All create commands, including create database, create table, create index, create procedure, create default, create rule, create trigger, and create view.
Which statement is used to create a trigger *?
In order to create a trigger, the CREATE TRIGGER statement is used. 4. Which statement is used to remove a trigger? Explanation: In order to delete a trigger, the DROP TRIGGER statement is used.
Which triggering event can cause a trigger to fire?
A triggering event or statement is the SQL statement, database event, or user event that causes a trigger to fire. A triggering event can be one or more of the following: An INSERT , UPDATE , or DELETE statement on a specific table (or view, in some cases)
What are the after triggers *?
What are the after triggers? Explanation: AFTER TRIGGERS can be classified further into three types as: AFTER INSERT Trigger, AFTER UPDATE Trigger, AFTER DELETE Trigger. Explanation: Example : declare @empid int; where empid is the variable.
Is it possible to enable or disable a database trigger?
The trigger still exists as an object in the current database. Triggers can be re-enabled by using ENABLE TRIGGER. DML triggers defined on tables can be also be disabled or enabled by using ALTER TABLE.
What are different in triggers?
In SQL Server we can create four types of triggers Data Definition Language (DDL) triggers, Data Manipulation Language (DML) triggers, CLR triggers, and Logon triggers.
Under which circumstances do you design database triggers?
To replicate built-in constraints in the Oracle server such as primary key and foreign key. C. To guarantee that when a specific operation is performed, related actions are performed.
Why DB triggers are bad?
In my experience they are evil, because they can result in surprising side effects, and are difficult to debug (especially when one trigger fires another). Often developers do not even think of looking if there is a trigger. The only time we’re using triggers is for really simple things like setting the ModifiedDate .
Do triggers slow down database?
A trigger fires inside the transaction that modifies the data in the table. The triggers of this type will not slow down operations, however, will ensure data coupling and integrity.
Why triggers are not recommended?
Performance / Scalability.
Triggers, by definition, run every time a DML operation runs, using logic and optional filtering to determine whether or not the trigger should ignore, block, rollback, or modify the DML changes attempted.
What is the alternative for triggers?
An alternative to a trigger is a stored procedure (or just some plain SQL) that gets called in the correct place manually after some event. E.g., if you have an ETL job that writes to a table, instead of using a trigger after the write finishes you can put in a call to the SP as the last step of the ETL job.
Are triggers good SQL?
Triggers can be a good choice if there is an external tool that access and inserts data to your database and you cannot access to code, but you need to add some functionality on insert, delete and update clauses.