大约有 6,000 项符合查询结果（耗时：0.0377秒） [XML]
Check if SQL Connection is Open or Closed
...
You should be using SqlConnection.State
e.g,
using System.Data;
if (myConnection != null && myConnection.State == ConnectionState.Closed)
{
// do something
// ...
}
...
SQL, Postgres OIDs, What are they and why are they useful?
I am looking at some PostgreSQL table creation and I stumbled upon this:
4 Answers
4
...
Entity Framework 4 vs NHibernate [closed]
...apping, better integration with stored procs / database functions / custom SQL / triggers, support for formula properties and so on. IMO it's basically just more mature as an ORM.
share
|
improve t...
sqlalchemy IS NOT NULL select
How can I add the filter as in SQL to select values that are NOT NULL from a certain column ?
3 Answers
...
2015互联网结束补贴战 从相杀到相爱只需一个长假 - 资讯 - 清泛网 - 专注C/...
...赶集网、美团和大众点评、携程和去哪儿、滴滴和快的，包括此前的优酷和土豆，就会发现，它们的共同点就是“烧钱”。因此如果要想预测下一个合并会是哪两个公司的话，只需要去找哪个领域目前是最烧钱的。所有的这些最...
Using MySQL with Entity Framework [closed]
Can't find anything relevant about Entity Framework/MySQL on Google so I'm hoping someone knows about it.
10 Answers
...
Oracle: If Table Exists
...s for an Oracle database, and was hoping Oracle had something similar to MySQL's IF EXISTS construct.
15 Answers
...
How to insert a SQLite record with a datetime set to 'now' in Android application?
...me function using the Java wrapper "ContentValues". Either you can use :
SQLiteDatabase.execSQL so you can enter a raw SQL query.
mDb.execSQL("INSERT INTO "+DATABASE_TABLE+" VALUES (null, datetime()) ");
Or the java date time capabilities :
// set the format to sql date time
SimpleDateFormat ...
How do I send a file as an email attachment using Linux command line?
...'ve created a script that runs every night on my Linux server that uses mysqldump to back up each of my MySQL databases to .sql files and packages them together as a compressed .tar file. The next step I want to accomplish is to send that tar file through email to a remote email server for safeke...
SQL ON DELETE CASCADE, Which Way Does the Deletion Occur?
...new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f13444859%2fsql-on-delete-cascade-which-way-does-the-deletion-occur%23new-answer', 'question_page');
}
);
Post as a guest
...