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Difference between float and decimal data type
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This is what I found when I had this doubt.
mysql> create table numbers (a decimal(10,2), b float);
mysql> insert into numbers values (100, 100);
mysql> select @a := (a/3), @b := (b/3), @a * 3, @b * 3 from numbers \G
*************************** 1. row *************************...
Virtual functions and performance - C++
...ual is a per-function attribute. A function only needs to be defined via vtable if it's marked as virtual or if it's overriding a base class that has it as virtual. You'll often see classes that have a group of virtual functions for public interface, and then a lot of inline accessors and so on. (...
When 1 px border is added to div, Div size increases, Don't want to do that
...order css property will increase all elements "outer" size, excepts tds in tables. You can get a visual idea of how this works in Firebug (discontinued), under the html->layout tab.
Just as an example, a div with a width and height of 10px and a border of 1px, will have an outer width and height...
Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
...) - square(avg(t2.monret))))),
current_timestamp,@MaxDate
from Table1 t1 join Table1 t2 on t1.Date = traDate
group by t1.index_id,t2.index_id
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Android static object lifecycle
...tarts a process and assigns it a unique process id and allocates a process table.A process start an instance of DVM(Dalvik VM); Each application runs inside a DVM.
A DVM manages class loading unloading, instance lifecycle, GC etc.
Lifetime of a static variable: A static variable comes into existenc...
Generating CSV file for Excel, how to have a newline inside a value
...l;}
-->
</style>
</head>
<body>
<table>
<tr>
<td>first line<br/>second line</td>
<td style="white-space:normal">first line<br/>second line</td>
</tr>
</table>
</bod...
What does principal end of an association means in 1:1 relationship in Entity framework
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@Ladislav, I need to make two independant tables that both have an optional reference to each other (one to one), I want them both to have their own PKs each, how is this possible? I posted a separate question.
– Shimmy Weitzhandler
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Curly braces in string in PHP
.... I use this pattern when the class attributes map to fields in a database table. While it is possible to store arrays in a database using serialization, it is inefficient, and pointless if the individual fields must be indexed. I often add an array of the field names, keyed by the iterator, for the...
invalid byte sequence for encoding “UTF8”
... trying to import some data into my database. So I've created a temporary table,
20 Answers
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How to make join queries using Sequelize on Node.js
...sted, but what it does is basically just aliasing all columns of the users table to make sure they are placed into the correct model when returned and not mixed up with the posts model
Other than that you'll notice that it does a JOIN instead of selecting from two tables, but the result should be t...