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Use email address as primary key?
... key. Email address may be a bit much, but a CASCADE UPDATE for a PK of 2-character country code isn't a big deal.
– Matthew Wood
Sep 27 '10 at 20:58
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Oracle取前N条记录方法 Oracle实现SELECT TOP N的方法 - 爬虫/数据库 - 清...
select * from ( select * from tablexxx order by xxx desc ) where rownum <= N
oracle数据库不支持mysql中limit, top功能,但可以通过rownum来限制返回的结果集的行数,rownum并不是用户添加的字段,而是oracle系统自动添加的。
INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
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Alt + F1 is shortcut for sp_help, for futrure readers, select table and press alt + f1
– satsvelke
Jul 16 '19 at 7:00
add a comment
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GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
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Do you think it is the right method to parse selected obj/array? help stackoverflow.com/questions/18140830/…
– LOG_TAG
Aug 9 '13 at 6:05
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Nested attributes unpermitted parameters
...4, I was able to get it working by structuring my fields_for as:
<%= f.select :tag_ids, Tag.all.collect {|t| [t.name, t.id]}, {}, :multiple => true %>
Then in my controller I have my strong params as:
private
def post_params
params.require(:post).permit(:id, :title, :content, :publi...
TFS Get Specific Version into separate folder
...orer
Drill down to desired file
File > Source Control > View History
Select desired version (Changeset)
Toolbar/Context Menu > Compare
Click in left pane, Select All, Copy, paste into Your Favorite Editor and save
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How can I output a UTF-8 CSV in PHP that Excel will read properly?
...pen this file in TextEdit or TextMate or Dreamweaver and it displays UTF-8 characters properly, but if I open it in Excel it's doing this silly íÄ kind of thing instead. Here's what I've got at the head of my document:
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What does $_ mean in PowerShell?
...dItem | Add-Member -Type NoteProperty -Name Bar -Value $_.Name -PassThru | Select Bar ... Well, it can work if you have a $_ in the scope where you're executing that pipeline. But that's very different from what you usually mean when trying to write something like that.
– Joey
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Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...rds (like books).
Explanation:
Input: List<String>
Output: Map<Character, List<String>>
The key of map is 'A' to 'Z'
Each list in the map are sorted.
Java:
import java.util.*;
class Main {
public static void main(String[] args) {
List<String> keywords = Arrays.as...
PHP Redirect with POST data
... the output of a
POST-activated script to redirect the
user agent to a selected resource. The
new URI is not a substitute reference
for the originally requested resource.
The 303 response MUST NOT be cached,
but the response to the second
(redirected) request might be
cacheable.
Th...