パスワード変更

• Oracle

alter user sys identified by "oracle";

• MySQL

set password for 'user2'@'%' = password('password');

(8.0)
set password for 'user2'@'%' = 'password';

• PostgreSQL

alter role postgres with password 'postgres';

• SQL Server

USE [master]
GO
ALTER LOGIN [taro] WITH PASSWORD=N'p@ssw0rd'
GO