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How to Join to first row
... LineItems
ON LineItems.LineItemGUID =
(
SELECT TOP 1 LineItemGUID
FROM LineItems
WHERE OrderID = Orders.OrderID
)
In SQL Server 2005 and above, you could just replace INNER JOIN with CROSS APPLY:
SELECT Orders.OrderNumber, LineItems2.Q...
Easier way to create circle div than using an image?
...ckground-color: #e7676d;
background-image: -webkit-gradient(linear, left top, left bottom, from(#e7676d), to(#b7070a)); /* Saf4+, Chrome */
background-image: -webkit-linear-gradient(top, #e7676d, #b7070a); /* Chrome 10+, Saf5.1+, iOS 5+ */
background-image: -moz-linear-gradient(top, #e7676d, #...
SQL - Select first 10 rows only?
...
In SQL server, use:
select top 10 ...
e.g.
select top 100 * from myTable
select top 100 colA, colB from myTable
In MySQL, use:
select ... order by num desc limit 10
sha...
Is there a vr (vertical rule) in html?
... one. HTML is parsed sequentially, meaning you lay out your HTML code from top to bottom, left to right how you want it to appear from top to bottom, left to right (generally)
A vr tag does not follow that paradigm.
This is easy to do using CSS, however. Ex:
<div style="border-left:1px solid #...
What replaces cellpadding, cellspacing, valign, and align in HTML5 tables?
...acing: 0; } /* cellspacing="0" */
/* valign */
th, td { vertical-align: top; }
/* align (center) */
table { margin: 0 auto; }
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What does if __name__ == “__main__”: do?
...e __name__ variable, i.e.
# It's as if the interpreter inserts this at the top
# of your module when run as the main program.
__name__ = "__main__"
When Your Module Is Imported By Another
On the other hand, suppose some other module is the main program and it imports your module. This means there'...
App Inventor 2 TaifunImage 拓展，图像高级处理功能，剪裁，压缩，翻转等 ...
...e.clientX - element.offsetLeft; offsetY = e.clientY - element.offsetTop; return false; // 防止文本选中 }; // 鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + '...
How to drop all tables in a SQL Server database?
...A.TABLE_CONSTRAINTS WHERE CONSTRAINT_TYPE='FOREIGN KEY'))
BEGIN
SELECT TOP 1 @sql=('ALTER TABLE ' + TABLE_SCHEMA + '.[' + TABLE_NAME + '] DROP CONSTRAINT [' + CONSTRAINT_NAME + ']')
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE CONSTRAINT_TYPE = 'FOREIGN KEY'
EXEC(@sql)
PRINT @...
LIMIT 10..20 in SQL Server
...L, and SQLite.
Other brands of database may have similar features (e.g. TOP in Microsoft SQL Server), but these don't always work identically.
It's hard to use TOP in Microsoft SQL Server to mimic the LIMIT clause. There are cases where it just doesn't work.
The solution you showed, using ROW_...
How to select the last record of a table in SQL?
...hich Database etc the best we can do is something like
Sql Server
SELECT TOP 1 * FROM Table ORDER BY ID DESC
MySql
SELECT * FROM Table ORDER BY ID DESC LIMIT 1
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