大约有 40,000 项符合查询结果（耗时：0.0467秒） [XML]
SET NOCOUNT ON usage
...OUNT is ON. Depends on client lib implementation in cases when query holds SELECT statements or RPC calls that do select, it may require to disable counting... WHEN disabled, rows are still counted for select statement, but flag DONE_COUNT is set to false. Always read what your client lib suggests s...
What does SQL clause “GROUP BY 1” mean?
...
SELECT account_id, open_emp_id
^^^^ ^^^^
1 2
FROM account
GROUP BY 1;
In above query GROUP BY 1 refers to the first column in select statement which is
account_id.
You also can speci...
How do I extract a sub-hash from a hash?
...e same:
h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {:b=>:B, :d=>:D}
h1 = Hash[h1.to_a - h2.to_a] # => {:a=>:A, :c=>:C}
And if you want to patch that into the Hash class:
class Hash
def extract...
SQL Server 2008 can't login with newly created user
...ick on SQL Server instance at root of Object Explorer, click on Properties
Select Security from the left pane.
Select the SQL Server and Windows Authentication mode radio button, and click OK.
Right-click on the SQL Server instance, select Restart (alternatively, open up Services and restart the ...
Moving project to another folder in Eclipse
...
Right click on the Eclipse project in the Package Explorer, select Refactor, then select Move... In the dialog that comes up, enter or navigate to the new location and click OK. This will also preserve your CVS or other SCM metadata, but will also bring all your modifications as well...
Fix code indentation in Xcode
...
Before Xcode 9 (for Xcode 9 see default shortcut below)
select text
right-click
there's a "Re-indent selection" item in popup menu
In XCode 4 there is one more step:
select text
right-click
Click on "Structure"
there's a "Re-indent selection" and other options in popup men...
How to empty a redis database?
...
$ redis-cli then select database. I am selecting 0 > select 0 and delete all keys of db 0 > FLUSHDB
– sagar junnarkar
May 5 '15 at 17:41
...
Cannot use a CONTAINS or FREETEXT predicate on table or indexed view because it is not full-text ind
...
use AdventureWorks
create fulltext catalog FullTextCatalog as default
select *
from sys.fulltext_catalogs
Create full-text search index.
create fulltext index on Production.ProductDescription(Description)
key index PK_ProductDescription_ProductDescriptionID
Before you create the index, m...
How to run iPhone emulator WITHOUT starting Xcode?
...s an icon for the simulator in the dock area. Right-click on that icon and select Options - Keep in Dock.
– RenniePet
Mar 8 '17 at 10:43
|
s...
Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...cause I mistakenly set the ng-model the same as the ng-repeat array:
<select ng-model="list_views">
<option ng-selected="{{view == config.list_view}}"
ng-repeat="view in list_views"
value="{{view}}">
{{view}}
</option>
</select>
Inste...