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What are DDL and DML?
...database
DROP – delete objects from the database
TRUNCATE – remove all records from a table, including all spaces allocated for the records are removed
COMMENT – add comments to the data dictionary
RENAME – rename an object
DML
DML is short name of Data Manipulation Lang...
Recover unsaved SQL query scripts
...recover the unsaved scripts if the SSMS crashes / unsaved tab gets accidentally closed?
13 Answers
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What is the idiomatic way to compose a URL or URI in Java?
...t Mikael, have you thought of publishing it to maven central? I know its small but makes using it easier. I can't find a similar class besides in JAX-RS. The lack of dependencies is definitely a plus.
– Barry Pitman
Mar 1 '12 at 8:46
...
Generate a random point within a circle (uniformly)
...triangle ABC, where |AB|=|BC|? Let's make this easier by extending to a parallelogram ABCD. It's easy to generate points uniformly in ABCD. We uniformly pick a random point X on AB and Y on BC and choose Z such that XBYZ is a parallelogram. To get a uniformly chosen point in the original triangle we...
How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
...
Retrieve specific commit from a remote Git repository
...(Q2 2015), fetching a single commit (without cloning the full repo) is actually possible.
See commit 68ee628 by Fredrik Medley (moroten), 21 May 2015.
(Merged by Junio C Hamano -- gitster -- in commit a9d3493, 01 Jun 2015)
You now have a new config (on the server side)
uploadpack.allowReachable...
How do I drag and drop files into an application?
...orm1 : Form {
public Form1() {
InitializeComponent();
this.AllowDrop = true;
this.DragEnter += new DragEventHandler(Form1_DragEnter);
this.DragDrop += new DragEventHandler(Form1_DragDrop);
}
void Form1_DragEnter(object sender, DragEventArgs e) {
if (e.Data....
How to edit data in result grid in SQL Server Management Studio
...ning your select query into a view
right click on the view and choose Edit All Rows (you will get a grid of values you can edit - even if the values are from different tables).
You can also add Insert/Update triggers to your view that will allow you to grab the values from your view fields and th...
Compare two folders which has many files inside contents
...ssing files, and which files differ:
diff -arq folder1 folder2
a treats all files as text, r recursively searched subdirectories, q reports 'briefly', only when files differ
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Oracle nvarchar和varchar相互转换、联合查询 - 数据库(内核) - 清泛网 - ...
...nvarchar和varchar相互转换、联合查询场景：联合查询（union all）Oracle两张表，同一组字段的数据类型不一致，分别是nvarchar和varchar。这时联合查询报错如下：ora12704：字...场景：联合查询（union all）Oracle两张表，同一组字段的数据...