Database

Let’s say you have an existing Microsoft SQL data and want to move it to a different disk or directory. Running the query below shows the logical name and the file location of your schema. SELECT name AS FileLogicalName, physical_name AS FileLocation FROM sys.master_files WHERE database_id = DB_ID('HR'); Existing Location FileLogicalName FileLocation HR C:\MSSQL_DATA\OldPath\HR.mdf HR_log C:\MSSQL_DATA\OldPath\HR.ldf Target New Location FileLogicalName FileLocation HR D:\MSSQL_DATA\MSSQL15.MSSQLSERVER\MSSQL\Data\HR.mdf HR_log D:\MSSQL_DATA\MSSQL15.MSSQLSERVER\MSSQL\Data\HR.0.ldf Steps to move the database files Take the database offline ...

In some MySQL installation in Ubuntu. You cannot login as root because it is not configured to use mysql_native_password. In this post, I will teach you how to enable mysql_native_password. Log in to MySQL via terminal with sudo mysql -u root Once inside MySQL, we will need to change the default plugin authentication to mysql_native_password and set a password for root. mysql> ALTER USER root@localhost IDENTIFIED BY 'password'; mysql> exit You can now login in MySQL as root using the password you set. ...

Suppose you want to retrieve a list of products that are not in promotion. SELECT * FROM product t1 LEFT JOIN promo_product t2 ON t1.idProduct = t2.product_idProduct WHERE t2.idPromoProduct IS NULL