大约有 9,000 项符合查询结果（耗时：0.0397秒） [XML]
What is the Oracle equivalent of SQL Server's IsNull() function?
In SQL Server we can type IsNull() to determine if a field is null. Is there an equivalent function in PL/SQL?
4 Answers...
Restore a postgres backup file using the command line?
I'm new to postgresql, and locally, I use pgadmin3. On the remote server, however, I have no such luxury.
24 Answers
...
When would I use XML instead of SQL? [closed]
...an the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
...
How do I split a string so I can access item x?
Using SQL Server, how do I split a string so I can access item x?
44 Answers
44
...
Insert multiple rows WITHOUT repeating the “INSERT INTO …” part of the statement?
... 'Timmy'
UNION ALL
SELECT 124, 'Jonny'
UNION ALL
SELECT 125, 'Sally'
For SQL Server 2008, can do it in one VALUES clause exactly as per the statement in your question (you just need to add a comma to separate each values statement)...
...
How can I convert bigint (UNIX timestamp) to datetime in SQL Server?
How can I convert UNIX timestamp (bigint) to DateTime in SQL Server?
15 Answers
15
...
Using backticks around field names
After reading a couple of answers and comments on some SQL questions here, and also hearing that a friend of mine works at a place which has a policy which bans them, I'm wondering if there's anything wrong with using backticks around field names in MySQL.
...
Correct use of Multimapping in Dapper
...
I just ran a test that works fine:
var sql = "select cast(1 as decimal) ProductId, 'a' ProductName, 'x' AccountOpened, cast(1 as decimal) CustomerId, 'name' CustomerName";
var item = connection.Query<ProductItem, Customer, ProductItem>(sql,
(p, c) =>...
Insert Update stored proc on SQL Server
...al way to do it and it's called upsert/merge.
Importance of UPSERT - from sqlservercentral.com:
For every update in the case mentioned above we are removing one
additional read from the table if we
use the UPSERT instead of EXISTS.
Unfortunately for an Insert, both the
UPSERT and IF EX...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
....insertBefore(hm, s); })();
使用App Inventor扩展实现多点触控：Rotation Detector
« 返回首页
Using App Inventor extensions to implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@...