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How do I create a foreign key in SQL Server?
...mportant point to note that is creating the foreign key does not create an index. Joining another table to this one could result in an extremely slow query.
– Rocklan
Sep 5 '14 at 0:13
...
Any idea why I need to cast an integer literal to (int) here?
...In general, you should not cast to Integer class. This involves something called auto-boxing, and can cause some subtle errors in your code.
The prefered method of doing what you want is:
Integer i6 = Integer.valueOf(-128)
...
How can I remove all text after a character in bash?
How can I remove all text after a character, in this case a colon (":"), in bash? Can I remove the colon, too? I have no idea how to.
...
How to list all the files in a commit?
... be programmatic):
$ git diff-tree --no-commit-id --name-only -r bd61ad98
index.html
javascript/application.js
javascript/ie6.js
Another Way (less preferred for scripts, because it's a porcelain command; meant to be user-facing)
$ git show --pretty="" --name-only bd61ad98
index.html
javascri...
mysql check collation of a table
...ion | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collation | Checksum | Create_options | Comment |
+------+--------+---------+------------+------+----------------+---------...
Effect of NOLOCK hint in SELECT statements
...nly use WITH (NOLOCK) in SELECT statements on tables that have a clustered index.
WITH(NOLOCK) is often exploited as a magic way to speed up database read transactions.
The result set can contain rows that have not yet been committed, that are often later rolled back.
If WITH(NOLOCK) is applied t...
How can I find an element by CSS class with XPath?
.../div[contains(concat(' ', @class, ' '), ' Test ')]
If you wished to be really certain that it will match correctly, you could also use the normalize-space function to clean up stray whitespace characters around the class name (as mentioned by @Terry):
//div[contains(concat(' ', normalize-space(@...
Declare a const array
...fields is a good habit to form.
Creates an array-like structure (allowing indexed access) that is truly and robustly read-only (conceptually constant, once created), both with respect to:
preventing modification of the collection as a whole (such as by removing or adding elements, or by assigning...
Why should I use the keyword “final” on a method parameter in Java?
...rom, final int to)
{
return new Iterator<Integer>(){
int index = from;
public Integer next()
{
return index++;
}
public boolean hasNext()
{
return index <= to;
}
// remove method omitted
};
}
H...
Fast way to discover the row count of a table in PostgreSQL
... than the limit anyway (like with ORDER BY something while it can't use an index, or with aggregate functions). Apart from that, only the limited number of rows from the subquery is processed.
– Erwin Brandstetter
Jun 17 '17 at 17:37
...