大约有 16,000 项符合查询结果(耗时:0.0527秒) [XML]

https://stackoverflow.com/ques... 

Get list of databases from SQL Server

... Execute: SELECT name FROM master.sys.databases This the preferred approach now, rather than dbo.sysdatabases, which has been deprecated for some time. Execute this query: SELECT name FROM master.dbo.sysdatabases or if you prefer EXEC sp_databases ...
https://stackoverflow.com/ques... 

ALTER DATABASE failed because a lock could not be placed on database

...DATABASE TESTING123 GO USE TESTING123; SELECT NEWID() AS X INTO FOO FROM sys.objects s1,sys.objects s2,sys.objects s3,sys.objects s4 ,sys.objects s5 ,sys.objects s6 Connections 2 and 3 set lock_timeout 5; ALTER DATABASE TESTING123 SET SINGLE_USER WITH ROLLBACK IMMEDIATE; ...
https://stackoverflow.com/ques... 

How to read environment variables in Scala

In Java, reading environment variables is done with System.getenv() . 6 Answers 6 ...
https://www.tsingfun.com/it/cp... 

Linux C/C++进程单实例互斥代码分享 - C/C++ - 清泛网 - 专注C/C++及内核技术

...std.h> #define kPidFileName "app.pid" bool enter_app_singleton() { int fd = open(kPidFileName, O_RDWR | O_TRUNC); if (fd == -1) { //对应的锁文件当前不存在,试图创建该锁文件 fd = creat(kPidFileName, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH); if (fd > 0) {...
https://stackoverflow.com/ques... 

Multiprocessing vs Threading Python [duplicate]

...ng over threading . I know that multiprocessing gets around the Global Interpreter Lock, but what other advantages are there, and can threading not do the same thing? ...
https://stackoverflow.com/ques... 

Change column type from string to float in Pandas

I want to convert a table, represented as a list of lists, into a Pandas DataFrame . As an extremely simplified example: 9...
https://stackoverflow.com/ques... 

How to run a python script from IDLE interactive shell?

...normally cannot be called with arguments. But here's a workaround: import sys sys.argv = ['helloworld.py', 'arg'] # argv[0] should still be the script name execfile('helloworld.py') Deprecated since 2.6: popen import os os.popen('python helloworld.py') # Just run the program os.popen('python ...
https://stackoverflow.com/ques... 

Is there a way to list open transactions on SQL Server 2000 database?

... For all databases query sys.sysprocesses SELECT * FROM sys.sysprocesses WHERE open_tran = 1 For the current database use: DBCC OPENTRAN share | ...
https://stackoverflow.com/ques... 

What is the python “with” statement designed for?

...inal working directory Here's another example that temporarily redirects sys.stdin, sys.stdout and sys.stderr to some other file handle and restores them later: from contextlib import contextmanager import sys @contextmanager def redirected(**kwds): stream_names = ["stdin", "stdout", "stderr...
https://stackoverflow.com/ques... 

How to create id with AUTO_INCREMENT on Oracle?

... SYS_GUID returns a GUID-- a globally unique ID. A SYS_GUID is a RAW(16). It does not generate an incrementing numeric value. If you want to create an incrementing numeric key, you'll want to create a sequence. CREATE SE...