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Change type of varchar field to integer: “cannot be cast automatically to type integer”
...y this, it will work for sure.
When writing Rails migrations to convert a string column to an integer you'd usually say:
change_column :table_name, :column_name, :integer
However, PostgreSQL will complain:
PG::DatatypeMismatch: ERROR: column "column_name" cannot be cast automatically to type i...
SQL Data Reader - handling Null column values
...!SqlReader.IsDBNull(indexFirstName))
{
employee.FirstName = sqlreader.GetString(indexFirstName);
}
That's your only reliable way to detect and handle this situation.
I wrapped those things into extension methods and tend to return a default value if the column is indeed null:
public static str...
Importing two classes with same name. How to handle?
...delete this
//import my.own.Date;
class Test{
public static void main(String [] args){
// I want to choose my.own.Date here. How?
my.own.Date myDate = new my.own.Date();
// I want to choose util.Date here. How ?
java.util.Date javaDate = new java.util.Date();
}
}
...
How to remove time portion of date in C# in DateTime object only?
...bly have the date in following format in object form not in the form of string .
38 Answers
...
How to format a number 0..9 to display with 2 digits (it's NOT a date)
...
You can use:
String.format("%02d", myNumber)
See also the javadocs
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The backend version is not supported to design database diagrams or tables
...uery instead of doing it graphically. See the snipped below:
USE [Database_Name]
GO
CREATE TABLE [dbo].[Table_Name](
[tableID] [int] IDENTITY(1,1) NOT NULL,
[column_2] [datatype] NOT NULL,
[column_3] [datatype] NOT NULL,
CONSTRAINT [PK_Table_Name] PRIMARY KEY CLUSTERED
(
[tableID] ASC
)
)
...
Do you need to use path.join in node.js?
... only real issue is that Windows command-line processors (or, more specifically, Windows-native command-line utilities) tend to interpret forward slashes as option specifiers rather than path components. Therefore, you need a backslashed path if you need to pass a path to a Windows command run as a ...
When should I make explicit use of the `this` pointer?
...
Usually, you do not have to, this-> is implied.
Sometimes, there is a name ambiguity, where it can be used to disambiguate class members and local variables. However, here is a completely different case where this-> is e...
Javascript Equivalent to PHP Explode()
I have this string:
18 Answers
18
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How to know if other threads have finished?
...G_THREADS;
private DownloadingThread extends Thread {
private final String url;
public DownloadingThread(String url) {
super();
this.url = url;
}
@Override
public void run() {
barrier.await(); // label1
download(url);
barrier.await(); // label2
...