大约有 3,556 项符合查询结果（耗时：0.0201秒） [XML]
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...
You didn't say what version you were using, but in SQL 2005 and above, you can use a common table expression with the OVER Clause. It goes a little something like this:
WITH cte AS (
SELECT[foo], [bar],
row_number() OVER(PARTITION BY foo, bar ORDER BY baz) AS [rn]
...
Using StringWriter for XML Serialization
..."1.0" encoding="utf-8"?><test/> to the string, then declaring the SqlParameter to be of type SqlDbType.Xml or SqlDbType.NVarChar would give you the "unable to switch the encoding" error. Then, when inserting manually via T-SQL, since you switched the declared encoding to be utf-16, you were...
Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
...
Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
... answered Feb 24 '09 at 17:57
SQLMenaceSQLMenace
122k2323 gold badges194194 silver badges218218 bronze badges
...
Simulating group_concat MySQL function in Microsoft SQL Server 2005?
I'm trying to migrate a MySQL-based app over to Microsoft SQL Server 2005 (not by choice, but that's life).
11 Answers
...
How to delete duplicate rows in SQL Server?
...
@omachu23: you can use any SQL in the CTE(apart from ordering), so if you want to filter by Johns: ...FROM dbo.Table1 WHERE Col1='John'. Here is the fiddle: sqlfiddle.com/#!6/fae73/744/0
– Tim Schmelter
Feb 11 '15...
How to convert all tables from MyISAM into InnoDB?
...t your database here first
//
// Actual code starts here
$sql = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'your_database_name'
AND ENGINE = 'MyISAM'";
$rs = mysql_query($sql);
while($row = mysql_fetch_array($rs))
{
...
How do I put an 'if clause' in an SQL string?
So here's what I want to do on my MySQL database.
9 Answers
9
...
What is the equivalent of 'describe table' in SQL Server?
I have a SQL Server database and I want to know what columns and types it has. I'd prefer to do this through a query rather than using a GUI like Enterprise Manager. Is there a way to do this?
...
Counting DISTINCT over multiple columns
... Excellent suggestion! The more I read, the more I am realizing that SQL is less about knowing syntax and functions and more about applying pure logic.. I wish I had 2 upvotes!
– tumchaaditya
Oct 4 '13 at 22:48
...