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How to select unique records by SQL
...Your data seems to indicate the minimum data value so in this instance for SQL Server.
SELECT item, min(data)
FROM table
GROUP BY item
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What's the hardest or most misunderstood aspect of LINQ? [closed]
...a mistaken impression of. I won't be specifically talking about LINQ to SQL or the Entity Framework except as examples of how queries can be executed remotely using expression trees (and usually IQueryable ).
...
SQL function as default parameter value?
...ET @currentDate = COALESCE(@currentDate,GETDATE())
– SQLMenace
Jan 22 '09 at 20:32
I was using that previously. "I was...
How to Store Historical Data
...our historical model. The Create / Update logic is handled in an Oracle PL/SQL package so you simply pass the function the current ID, your user ID and the new XML data and internally it does all the updating / inserting of rows to represent that in the historical model. The start and end times indi...
Insert text with single quotes in PostgreSQL
...uotes or multiple layers of escaping, you can avoid quoting hell in PostgreSQL with dollar-quoted strings:
'escape '' with '''''
$$escape ' with ''$$
To further avoid confusion among dollar-quotes, add a unique token to each pair:
$token$escape ' with ''$token$
Which can be nested any number of...
使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
...or.aix 扩展。 该扩展包含在源代码中。 通常，项目源文件包括项目使用的任何扩展名。
2、实现ScaleDetector扩展
上一节展示了如何使用提供的 ScaleDetector 扩展 aix 文件创建应用程序。 你还可以练习实现扩展本身。
规模检测或扩...
How do I escape a percentage sign in T-SQL?
... too: [_]. How do you escape the open square bracket then? Like this: [[]. sqlserver2000.databases.aspfaq.com/…
– Csaba Toth
Apr 3 '14 at 18:25
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OPTION (RECOMPILE) is Always Faster; Why?
...rience the only time this is a viable option is when you are using dynamic SQL. Before you explore whether this makes sense in your situation I would recommend rebuilding your statistics. This can be done by running the following:
EXEC sp_updatestats
And then recreating your execution plan. Th...
What is the best way to auto-generate INSERT statements for a SQL Server table?
...atements for all of the data in your table, using no scripts or add-ins to SQL Management Studio 2008:
Right-click on the database and go to Tasks > Generate Scripts.
Select the tables (or objects) that you want to generate the script against.
Go to Set scripting options tab and click on the Ad...
Find and Replace text in the entire table using a MySQL query
Usually I use manual find to replace text in a MySQL database using phpmyadmin. I'm tired of it now, how can I run a query to find and replace a text with new text in the entire table in phpmyadmin?
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