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 connect Python to Oracle using oracledb - Stack Overflow
Nov 1, 2023 · I'm trying to connect to Oracle using using the following Python script: import oracledb connection = oracledb.connect(user = 'user', password = 'PW', ...
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 …
windows QQ9怎么导出聊天记录呢?（2025-01）? - 知乎
Jan 3, 2025 · Windows版QQ9的聊天记录导出支持导入旧版文件、导出到手机或从手机导出，具体操作需参考设置选项。
sql - How to query MongoDB with "like" - Stack Overflow
Jul 22, 2010 · I want to query something with SQL's like query: SELECT * FROM users WHERE name LIKE '%m%' How can I achieve the same in MongoDB? I can't find an operator for like in ...
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 fix "The target principal name is incorrect error" with ...
Dec 30, 2021 · AlwaysLearning posted the answer in the comments: The target principal name is incorrect signifies that the Name or IP Address you're using in the Server=...; portion of your …