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In MySQL, can I copy one row to insert into the same table?
...you don't have to worry about the primary key. Setting it to null allows MySQL to choose the value itself, so there's no risk of creating a duplicate.
If you want to be super-sure you're only getting one row to insert, you could add LIMIT 1 to the end of the INSERT INTO line.
Note that I also appe...
How to check date of last change in stored procedure or function in SQL server
... I know how to check creation date (it is in function properties window in SQL Server Management Studio).
I found that in SQL Server 2000 it wasn't possible to check modify date ( look at this post: Is it possible to determine when a stored procedure was last modified in SQL Server 2000? )
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aiStarter 启动USB调试
也是利用aiStarter启动USB调试，通过US...
SQL Server - transactions roll back on error?
We have client app that is running some SQL on a SQL Server 2005 such as the following:
5 Answers
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Add a column to existing table and uniquely number them on MS SQL Server
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This will depend on the database but for SQL Server, this could be achieved as follows:
alter table Example
add NewColumn int identity(1,1)
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TSQL - Cast string to integer or return default value
Is there a way in T-SQL to cast an nvarchar to int and return a default value or NULL if the conversion fails?
8 Answers
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Max or Default?
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Since DefaultIfEmpty isn't implemented in LINQ to SQL, I did a search on the error it returned and found a fascinating article that deals with null sets in aggregate functions. To summarize what I found, you can get around this limitation by casting to a nullable within your...
How do I check if a SQL Server text column is empty?
I am using SQL Server 2005. I have a table with a text column and I have many rows in the table where the value of this column is not null, but it is empty. Trying to compare against '' yields this response:
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Why do table names in SQL Server start with “dbo”?
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dbo is the default schema in SQL Server. You can create your own schemas to allow you to better manage your object namespace.
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Get day of week in SQL Server 2005/2008
... answered Jul 10 '09 at 17:51
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