大约有 6,000 项符合查询结果（耗时：0.0172秒） [XML]
PostgreSQL naming conventions
Where can I find a detailed manual about PostgreSQL naming conventions? (table names vs. camel case, sequences, primary keys, constraints, indexes, etc...)
...
SQL query to get all values a enum can have
Postgresql got enum support some time ago.
4 Answers
4
...
Mocking python function based on input arguments
...d from a database and we would like to test this module by mocking pd.read_sql_table method (which takes table_name as argument).
What you can do is to create (inside your test) a db_mock method that returns different objects depending on the argument provided:
def db_mock(**kwargs):
if kwargs...
PostgreSQL delete all content
Hello I want to delete all data in my postgresql tables, but not the table itself.
How could I do this?
3 Answers
...
Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...IX作業系統，這個錯誤的意思是指欲開啟檔案的路徑名稱(包括檔案名稱)太長。
WSAEHOSTDOWN (10064) 對方主機關閉
在柏克萊socket介面的解釋中，這個錯誤發生的原因是當遠端主機關閉或系統出問題。
WSAEHOSTUNREACH (10065) 無法聯...
How to establish a connection pool in JDBC?
...ource cpds = new ComboPooledDataSource();
cpds.setDriverClass( "org.postgresql.Driver" ); //loads the jdbc driver
cpds.setJdbcUrl( "jdbc:postgresql://localhost/testdb" );
cpds.setUser("swaldman");
cpds.setPassword("test-password");
// the settings below are optional -- c3p0 can work with defaults
c...
Exit single-user mode
...the processes that have been currently running.
Then, run the following T-SQL to set the database in MULTI_USER mode.
USE master
GO
DECLARE @kill varchar(max) = '';
SELECT @kill = @kill + 'KILL ' + CONVERT(varchar(10), spid) + '; '
FROM master..sysprocesses
WHERE spid > 50 AND dbid = DB_ID('&l...
Store pictures as files or in the database for a web app?
...
Also, in SQL Server when you store the image as an "Image" field, this is effectively what SQL is doing - storing a pointer to the file on disk somewhere. This is how it gets around the 8KB page limit.
– Zhaph - ...
MySQL stored procedure vs function, which would I use when?
I'm looking at MySQL stored procedures and function. What is the real difference?
5 Answers
...
PostgreSQL Crosstab Query
Does any one know how to create crosstab queries in PostgreSQL?
For example I have the following table:
6 Answers
...