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How to add “on delete cascade” constraints?
...hy until you see "Constraints"), or you can query the information schema.
select *
from information_schema.key_column_usage
where position_in_unique_constraint is not null
share
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improve this ans...
Is there a shortcut to make a block comment in Xcode?
...
Created Automator service using AppleScript
Make sure "Output replaces selected text" is checked
Enter the following code:
on run {input, parameters}
return "/*\n" & (input as string) & "*/"
end run
Now you can access that service through Xcode - Services menu, or by right clicking...
How do I return to an older version of our code in Subversion?
...
If you are using TortoiseSVN, right-click the file select Merge, then Merge a Range of Revisions. In the log box type in 140-150 and click the Reverse Checkbox. After that, commit as usual. This will perform the same operation as Jon's example.
– DavGarc...
Alter column, add default constraint
...e bla add constraint dt_bla default 1 for id
insert bla default values
select * from bla
also make sure you name the default constraint..it will be a pain in the neck to drop it later because it will have one of those crazy system generated names...see also How To Name Default Constraints And ...
belongs_to through associations
...
I'd like to know myself. Everything I tried fired 3 selects. You can specify a "-> { joins :something }" lambda on an association. The join is fired but subsequently another select anyway. I wasn't able to tune this up.
– Renra
Oct 21 ...
Insert auto increment primary key to existing table
...etrieve it by id immediately, MySQL offers LAST_INSERT_ID() for that value SELECT * FROM table_name WHERE id = LAST_INSERT_ID() and most programming language APIs offer some function/method to return that value in the application code.
– Michael Berkowski
Jan 2...
Where is Developer Command Prompt for VS2013?
...
From VS2013 Menu Select "Tools", then Select "External Tools". Enter as below:
Title: "VS2013 Native Tools-Command Prompt" would be good
Command: C:\Windows\System32\cmd.exe
Arguments: /k "C:\Program Files (x86)\Microsoft Visual Studio 12.0...
How to select an element with 2 classes [duplicate]
...
You can chain class selectors without a space between them:
.a.b {
color: #666;
}
Note that, if it matters to you, IE6 treats .a.b as .b, so in that browser both div.a.b and div.b will have gray text. See this answer for a comparison bet...
Cannot drop database because it is currently in use
...ar(50)
SET @DatabaseName = N'YOUR_DABASE_NAME'
DECLARE @SQL varchar(max)
SELECT @SQL = COALESCE(@SQL,'') + 'Kill ' + Convert(varchar, SPId) + ';'
FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId
--SELECT @SQL
EXEC(@SQL)
...
What is the advantage of using heredoc in PHP? [closed]
...e day I used to use them to construct SQL queries:
$sql = <<<SQL
select *
from $tablename
where id in [$order_ids_list]
and product_name = "widgets"
SQL;
To me this has a lower probability of introducing a syntax error than using quotes:
$sql = "
select *
from $tablename
where ...