大约有 40,000 项符合查询结果（耗时：0.0399秒） [XML]
Retrieve the maximum length of a VARCHAR column in SQL Server
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Use the built-in functions for length and max on the description column:
SELECT MAX(LEN(DESC)) FROM table_name;
Note that if your table is very large, there can be performance issues.
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How can I query a value in SQL Server XML column
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select
Roles
from
MyTable
where
Roles.value('(/root/role)[1]', 'varchar(max)') like 'StringToSearchFor'
These pages will show you more about how to query XML in T-SQL:
Querying XML fields using t-sql
Flattening XML Dat...
Invoke a callback at the end of a transition
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You want to listen for the "end" event of the transition.
// d3 v5
d3.select("#myid").transition().style("opacity","0").on("end", myCallback);
// old way
d3.select("#myid").transition().style("opacity","0").each("end", myCallback);
This demo uses the "end" event to chain many transitions in...
How to get a number of random elements from an array?
...- Math.random());
// Get sub-array of first n elements after shuffled
let selected = shuffled.slice(0, n);
DEMO:
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Generating a random & unique 8 character string using MySQL
...umn:
INSERT INTO vehicles VALUES (blah); -- leaving out the number plate
SELECT @lid:=LAST_INSERT_ID();
UPDATE vehicles SET numberplate=concat(
substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', rand(@seed:=round(rand(@lid)*4294967296))*36+1, 1),
substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'...
How to display default text “--Select Team --” in combo box on pageload in WPF?
...ComboBox Name="MyComboBox"
IsEditable="True"
IsReadOnly="True"
Text="-- Select Team --" />
You'll obviously need to add your other options, but this is probably the simplest way to do it.
There is however one downside to this method which is while the text inside your combo box will not be ...
How can I configure NetBeans to insert tabs instead of a bunch of spaces?
...it Tab for indenting code, I like to get a real tab. Meaning that when I select that, I only have one large thing selected. NetBeans inserts 5 spaces instead of a tab when I hit Tab . Is there a way I can change that?
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SQL Server: Query fast, but slow from procedure
...:
CREATE PROCEDURE GetOrderForCustomers(@CustID varchar(20))
AS
BEGIN
SELECT *
FROM orders
WHERE customerid = @CustID
END
Fast way:
CREATE PROCEDURE GetOrderForCustomersWithoutPS(@CustID varchar(20))
AS
BEGIN
DECLARE @LocCustID varchar(20)
SET @LocCustID = @CustID
SELEC...
Get list of databases from SQL Server
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Execute:
SELECT name FROM master.sys.databases
This the preferred approach now, rather than dbo.sysdatabases, which has been deprecated for some time.
Execute this query:
SELECT name FROM master.dbo.sysdatabases
or if you pref...
How to find and return a duplicate value in array
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@Kalanamith you can get duplicated values using this a.select {|e| a.count(e) > 1}.uniq
– Naveed
Jul 12 '13 at 16:34
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