衰减的单位dB是什么意思？ - 知乎
Oct 3, 2013 · 如果我们用dB来表示的话，第一种情况增大了3dB，而第二种情况增大了10.4dB，更能客观地反映出人的感官的感觉特性。 而在电子工程技术领域，dB是国际上统一使用的电信 …
*.db是什么文件，如何打开？ - 知乎
后缀是.db的文件是数据库文件，db是datebase的缩写，datebase的意思就是数据库。 数据库类型包括： 关系数据库、 非关系型数据库 （NoSQL） 关系型的有：Oracle，MySQL， …
How to create a DB link between two oracle instances
Nov 7, 2012 · How to create a DB link between two Oracle instances. Let's say A and B are two instances. I want to access the data in instance B from the instance A.
MySQL: Grant **all** privileges on database - Stack Overflow
Feb 16, 2011 · use my_app_db; GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost'; Note: The GRANT ALL PRIVILEGES ON database_name.* TO 'root'@'localhost'; command may not …
Opening database file from within SQLite command-line shell
Jan 30, 2012 · sqlite3 data.db I cannot figure out how to open a database file from within the tool after having invoked it without supplying the file as a command-line argument (if I, say, double …
sql server - Exit single-user mode - Stack Overflow
Currently, my database is in Single User mode. When I try to expand me database, I get an error: The database 'my_db' is not accessible.(ObjectExplorer) Also, when I try to delete the …
PostgreSQL: Remotely connecting to Postgres instance using psql …
Connect remotely - psql -U <db_username> -h <IP_address> - in case psql is running on a port other than 5432 on the remote server, specify port by adding -p <port_number> A little plus …
How to select data of a table from another database in SQL Server?
Suppose that I have a database which name is testdb in test server. I also have a database named proddb in prod server. Now I want to select data of a table of testdb database from …
How can I generate an entity–relationship (ER) diagram of a …
I want to generate an ER diagram of an SQL database using Microsoft SQL Server Management Studio (SMSS). However, I don’t know how to. I found this technique online: Making ER …
Import .bak file to a database in SQL server - Stack Overflow
May 26, 2023 · I have a file with .bak extension. How can I import this file data to a database in SQL Server?