大约有 6,100 项符合查询结果（耗时：0.0299秒） [XML]
How to customize the background/border colors of a grouped table view cell?
...to customize both the background and the border color of a grouped-style UITableView.
11 Answers
...
SQL - using alias in Group By
...M (
SELECT ItemName, SUBSTRING(ItemName, 1, 1) AS FirstLetter
FROM table1
) ItemNames
GROUP BY ItemName, FirstLetter
share
|
improve this answer
|
follow
...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
...rticularly user friendly. For instance, I'm displaying a datagrid of a sql table, and I'd like the users to be able to see/edit true or false, not 1 or 0.
– Charles Clayton
Jul 17 '15 at 16:04
...
Normalizing mousewheel speed across browsers
...k put together a great solution to this problem.
I have tested on a data table that I'm building using React and it scrolls like butter!
This solution works on a variety of browsers, on Windows/Mac, and both using trackpad/mouse.
// Reasonable defaults
var PIXEL_STEP = 10;
var LINE_HEIGHT = 4...
What are some good Python ORM solutions? [closed]
...ably the simplest API:
from storm.locals import *
class Foo:
__storm_table__ = 'foos'
id = Int(primary=True)
class Thing:
__storm_table__ = 'things'
id = Int(primary=True)
name = Unicode()
description = Unicode()
foo_id = Int()
foo = Reference(foo_id, Foo.id)
db ...
How do I flush the PRINT buffer in TSQL?
... on PRINT or RAISERROR and just load your "print" statements into a ##Temp table in TempDB or a permanent table in your database which will give you visibility to the data immediately via a SELECT statement from another window. This works the best for me. Using a permanent table then also serves a...
SQL query for finding records where count > 1
I have a table named PAYMENT . Within this table I have a user ID, an account number, a ZIP code and a date. I would like to find all records for all users that have more than one payment per day with the same account number.
...
Can I store images in MySQL [duplicate]
...need to save as a blob, LONGBLOB datatype in mysql will work.
Ex:
CREATE TABLE 'test'.'pic' (
'idpic' INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,
'caption' VARCHAR(45) NOT NULL,
'img' LONGBLOB NOT NULL,
PRIMARY KEY ('idpic')
)
As others have said, its a bad practice but it can be don...
Database development mistakes made by application developers [closed]
... auto-incrementing fields (SQL Server, MySQL, others) or sequences (most notably Oracle).
In my opinion you should always use surrogate keys. This issue has come up in these questions:
How do you like your primary keys?
What's the best practice for primary keys in tables?
Which format of primary...
When to add what indexes in a table in Rails
... end of the index.
If you have a has_many :through relationship, your join table should have a unique index on both properties involved in the join as a compound key.
If you fetch a record directly using a unique identifier such as username or email, that should be a unique index.
If you fetch sets ...