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Get the new record primary key ID from MySQL insert query?
...doing a MySQL INSERT into one of my tables and the table has the column item_id which is set to autoincrement and primary key .
...
How to alias a table in Laravel Eloquent queries (or using Query Builder)?
...items as items_alias' )
->join( 'attachments as att', DB::raw( 'att.item_id' ), '=', DB::raw( 'items_alias.id' ) )
->select( DB::raw( 'items_alias.*' ) )
->get();
This will automatically add table prefix to table names and returns an instance of Items model. not a bare query r...
MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...数据如下：
> db.students.find()
{ "_id" : ObjectId("5031143350f2481577ea81e5"), "classid" : 1, "age" : 20, "name" : "kobe" }
{ "_id" : ObjectId("5031144a50f2481577ea81e6"), "classid" : 1, "age" : 23, "name" : "nash" }
{ "_id" : ObjectId("5031145a50f2481577ea81e7"), "classid" : 2, "age" : ...
What are the disadvantages of using persistent connection in PDO
...is answer before running SELECT orders.* FROM orders LEFT JOIN items USING(item_id)
– Ast Derek
Jul 26 '10 at 18:09
31
...
What's the difference between EscapeUriString and EscapeDataString?
...System.Web.HttpUtility.UrlEncode(data));
/*
=>
example.com/abc?DEF=%E3%81%82%E3%81%84%E3%81%86%20%E3%81%88%E3%81%8A
example.com%2Fabc%3FDEF%3D%E3%81%82%E3%81%84%E3%81%86%20%E3%81%88%E3%81%8A
example.com%2Fabc%3FDEF%3D%E3%81%82%E3%81%84%E3%81%86+%E3%81%88%E3%81%8A
example.com%2fabc%3fDEF%3d%e3%81...
Test if remote TCP port is open from a shell script
...e timeout
$ timeout 1 bash -c 'cat < /dev/null > /dev/tcp/google.com/81'
$ echo $?
124
What's happening here is that timeout will run the subcommand and kill it if it doesn't exit within the specified timeout (1 second in the above example). In this case bash is the subcommand and uses its s...
Is 'switch' faster than 'if'?
... using a jump table -- 4 comparison instructions are clearly visible:
13FE81C51 cmp qword ptr [rsp+30h],1
13FE81C57 je testSwitch+73h (13FE81C73h)
13FE81C59 cmp qword ptr [rsp+30h],2
13FE81C5F je testSwitch+87h (13FE81C87h)
13FE81C61 cmp qword ptr [rsp+30h],3
13FE81C67 je testSwitch+9...
How do I spool to a CSV formatted file using SQLPLUS?
...00, , 20
7499,ALLEN ,SALESMAN , 7698,20-FEB-81, 1600, 300, 30
7521,WARD ,SALESMAN , 7698,22-FEB-81, 1250, 500, 30
7566,JONES ,MANAGER , 7839,02-APR-81, 2975, , 20
7654,MARTIN...
How to start nginx via different port(other than 80)
...ired port; in the snippet below, we are serving the Nginx instance on port 81.
server {
listen 81;
}
To start the server, run the command line below;
sudo service nginx start
You may now access your application on port 81 (for localhost, http://localhost:81).
...
Artificially create a connection timeout error
...he firewall that simply drops TCP SYN packets. For example, www.google.com:81.
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