大约有 5,887 项符合查询结果（耗时：0.0266秒） [XML]
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...o which a VARCHAR's length can be extended through the use of online ALTER TABLE. Consequently, I derived those numbers by creating a table with a varchar(2) charset utf8 column and seeing how far I was able to extend it given ALGORITHM=INPLACE.
– antak
Apr 11...
MySQL Query - Records between Today and Last 30 Days
... the WHERE clause:
SELECT DATE_FORMAT(create_date, '%m/%d/%Y')
FROM mytable
WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND CURDATE()
Also note that CURDATE() returns only the DATE portion of the date, so if you store create_date as a DATETIME with the time portion filled, this qu...
Add alternating row color to SQL Server Reporting services report
...
Go to the table row's BackgroundColor property and choose "Expression..."
Use this expression:
= IIf(RowNumber(Nothing) Mod 2 = 0, "Silver", "Transparent")
This trick can be applied to many areas of the report.
And in .NET 3.5+ Y...
LINQ query to select top five
...Select', To validate it, you can try a simple script
select id as i from table where i=3
and it will not work, the reason is engine will parse Where before Select, so it won't know alias i in the where. To make this work, you can try
select * from (select id as i from table) as t where i = 3
...
iOS: Multi-line UILabel in Auto Layout
...
This is the only answer that worked for me within a Table View Cell. Also works with a fixed number of rows (instead of 0/unlimited)
– bgolson
Nov 19 '14 at 22:18
...
When to use a Content Provider
... best thing about it is that you can customize the contentproviders for suitable URIs.
Here's a scenario where you may have 5 tables in your database, but you need to join a few of them in certain orders before using them. And make a content URI for each of these joins. You could then each use thes...
How to Right-align flex item?
... Thanks. Would you personally prefer this over Yohann Tilotti's display table method above? If so, why?
– Mark Boulder
Mar 16 '14 at 4:19
...
Active Record - Find records which were created_at before today
...ys.ago)
Using the underlying Arel interface:
MyModel.where(MyModel.arel_table[:created_at].lt(2.days.ago))
Using a thin layer over Arel:
MyModel.where(MyModel[:created_at] < 2.days.ago)
Using squeel:
MyModel.where { created_at < 2.days.ago }
...
Check if an element is a child of a parent
... is not within child';
}
<div id="parent">
<div>
<table>
<tr>
<td><span id="child"></span></td>
</tr>
</table>
</div>
</div>
<div id="result"></div>
...
Using :after to clear floating elements
...s well:
.clearfix:before,
.clearfix:after {
content: "";
display: table;
}
.clearfix:after {
clear: both;
}
/* IE 6 & 7 */
.clearfix {
zoom: 1;
}
Give the class clearfix to the parent element, for example your ul element.
Sources here and here.
...