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Export specific rows from a PostgreSQL table as INSERT SQL script
...d line utility pg_dump to export to a file:
create table export_table as
select id, name, city
from nyummy.cimory
where city = 'tokyo'
$ pg_dump --table=export_table --data-only --column-inserts my_database > data.sql
--column-inserts will dump as insert commands with column names.
--data-...
C# Iterating through an enum? (Indexing a System.Array)
...rmat("{0}: {1}", Enum.GetName(typeof(MyEnum), val), val));
}
Or, you can cast the System.Array that is returned:
string[] names = Enum.GetNames(typeof(MyEnum));
MyEnum[] values = (MyEnum[])Enum.GetValues(typeof(MyEnum));
for( int i = 0; i < names.Length; i++ )
{
print(names[i], values[i])...
Why does (0 < 5 < 3) return true?
...
My guess is because 0 < 5 is true, and true < 3 gets cast to 1 < 3 which is true.
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Setting Short Value Java
...or byte or short types. Instead, you may declare it as such using explicit casting:
byte foo = (byte)0;
short bar = (short)0;
In your setLongValue(100L) method call, you don't have to necessarily include the L suffix because in this case the int literal is automatically widened to a long. This is...
Can we make unsigned byte in Java
...7 to a byte (or lower than -128). However, there's nothing to stop you downcasting an int (or short) in order to achieve this:
int i = 200; // 0000 0000 0000 0000 0000 0000 1100 1000 (200)
byte b = (byte) 200; // 1100 1000 (-56 by Java specification, 200 by convention)
/*
* Will print a negative ...
Select between two dates with Django
I am looking to make a query that selects between dates with Django.
4 Answers
4
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Reliable method to get machine's MAC address in C#
...aces()
where nic.OperationalStatus == OperationalStatus.Up
select nic.GetPhysicalAddress().ToString()
).FirstOrDefault();
Or:
String firstMacAddress = NetworkInterface
.GetAllNetworkInterfaces()
.Where( nic => nic.OperationalStatus == OperationalStatus.Up &&...
Round a double to 2 decimal places [duplicate]
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And with DecimalFormat you can also select the rounding mode; default will match the OP's example or they may want RoundingMode.DOWN.
– Kevin Brock
May 11 '10 at 7:03
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Which are more performant, CTE or temporary tables?
...(A INT IDENTITY PRIMARY KEY, B INT , F CHAR(8000) NULL);
INSERT INTO T(B)
SELECT TOP (1000000) 0 + CAST(NEWID() AS BINARY(4))
FROM master..spt_values v1,
master..spt_values v2;
Example 1
WITH CTE1 AS
(
SELECT A,
ABS(B) AS Abs_B,
F
FROM T
)
SELECT *
FROM CTE1
WHERE A = 780
...
Call an activity method from a fragment
...
BE careful cause unexpected things happen if cast doesn't work.. :S
– Ewoks
Dec 14 '12 at 12:34
49
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