大约有 3,552 项符合查询结果（耗时：0.0316秒） [XML]
SQL query to get all values a enum can have
Postgresql got enum support some time ago.
4 Answers
4
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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
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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...
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
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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...
PostgreSQL Crosstab Query
Does any one know how to create crosstab queries in PostgreSQL?
For example I have the following table:
6 Answers
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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?
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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 - ...
Store query result in a variable using in PL/pgSQL
How to assign the result of a query to a variable in PL/pgSQL, the procedural language of PostgreSQL?
5 Answers
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Are there any disadvantages to always using nvarchar(MAX)?
In SQL Server 2005, are there any disadvantages to making all character fields nvarchar(MAX) rather than specifying a length explicitly, e.g. nvarchar(255)? (Apart from the obvious one that you aren't able to limit the field length at the database level)
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