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CodeIgniter activerecord, retrieve last insert id?
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for Specific table you cannot use $this->db->insert_id() . even the last insert happened long ago it can be fetched like this. may be wrong. but working well for me
$this->db->select_max('{primary key}');
$result= $...
How to order by with union in SQL?
...olas Carey - when I initially tested using a UNION it was behaving unpredictably as you described, I think the UNION ALL (at least in Oracle) was necessary to order the top SELECT above the bottom. However I've provided an alternate that does guarantee correct ordering and should be database indepe...
Is the NOLOCK (Sql Server hint) bad practice?
...dated at the same time another process may be selecting data from the same table. If this happens a lot then there's a high probability of deadlocks unless you use a database mode such as READ COMMITED SNAPSHOT.
I have since changed my perspective on the use of NOLOCK after witnessing how it can i...
Storing JSON in database vs. having a new column for each key
I am implementing the following model for storing user related data in my table - I have 2 columns - uid (primary key) and a meta column which stores other data about the user in JSON format.
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How to calculate the CPU usage of a process by PID in Linux from C?
...w fields (from Documentation/filesystems/proc.txt in your kernel source):
Table 1-3: Contents of the stat files (as of 2.6.22-rc3)
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Field Content
pid process id
tcomm filename of the execut...
What did MongoDB not being ACID compliant before v4 really mean?
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One thing you lose with MongoDB is multi-collection (table) transactions. Atomic modifiers in MongoDB can only work against a single document.
If you need to remove an item from inventory and add it to someone's order at the same time - you can't. Unless those two things - i...
Trim string in JavaScript?
...pt-5-support-and-more.aspx
Chrome: 5+
Opera: 10.5+
ECMAScript 5 Support Table: http://kangax.github.com/es5-compat-table/
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In the shell, what does “ 2>&1 ” mean?
...ing both streams to the same destination.
Here is how the file descriptor table looks like after Bash has redirected both streams:
As you can see, both stdout and stderr now point to file. So anything written to stdout and stderr gets written to file.
There are several ways to redirect both str...
How to make a floated div 100% height of its parent?
...ion, and even if you have several floated child elements, it seems an acceptable drawback to style their offset absolutely positioned. +1
– kontur
Jul 7 '14 at 11:26
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Swift native base class or NSObject
...r by using the '@objc' decoration. Otherwise it will follow a static- and vtable-dispatch style, like C++.
6 Answers
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