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Convert varchar to uniqueidentifier in SQL Server
...
DECLARE @uuid VARCHAR(50)
SET @uuid = 'a89b1acd95016ae6b9c8aabb07da2010'
SELECT CAST(
SUBSTRING(@uuid, 1, 8) + '-' + SUBSTRING(@uuid, 9, 4) + '-' + SUBSTRING(@uuid, 13, 4) + '-' +
SUBSTRING(@uuid, 17, 4) + '-' + SUBSTRING(@uuid, 21, 12)
AS UNIQUEIDENTIFIER)
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PostgreSQL “DESCRIBE TABLE”
... 'table' or \ds 'sequence' and so on)
The SQL standard way, as shown here:
select column_name, data_type, character_maximum_length, column_default, is_nullable
from INFORMATION_SCHEMA.COLUMNS where table_name = '<name of table>';
It's supported by many db engines.
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How do you set the startup page for debugging in an ASP.NET MVC application?
...he start page property.
Go to the project's Properties
Go to the Web tab
Select the Specific Page radio button
Type in the desired url in the Specific Page text box
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C# SQL Server - Passing a list to a stored procedure
...StringList READONLY
AS
BEGIN
-- Just return the items we passed in
SELECT l.Item FROM @list l;
END
Finally here's some sql to use it in c#:
using (var con = new SqlConnection(connstring))
{
con.Open();
using (SqlCommand cmd = new SqlCommand("exec sp_UseStringList @list", con))
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What's the false operator in C# good for?
...he operator false declared in T, and T.&(x, y) is an invocation of the selected operator &. In other words, x is first evaluated and operator false is invoked on the result to determine if x is definitely false. Then, if x is definitely false, the result of the operation is the value previou...
Where do I set my company name?
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In xCode 7.3 (edit: till 11.3.1) just select top project file and Look in Utilities on Left pane
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How can I force Powershell to return an array when a call only returns one object?
...wmi Win32_NetworkAdapterConfiguration
| Where { $_.IPAddress }
| Select -Expand IPAddress
| Where { $_ -like '*.*.*.*' }
| Sort)
Specify the data type of the variable as an array:
[array]$serverIps = gwmi Win32_NetworkAdapterConfiguration
| Where { $_.IPAddress }
| S...
How to write UPDATE SQL with Table alias in SQL Server 2008?
... Mark Byers - Great Answer!! This syntax allows me to add a commented out Select statement, which allows me to test the update by doing the select first (highlight from the select down and execute): SET Q.TITLE = 'TEST' -- SELECT *
– user1636464
Aug 30 '12 at ...
When should I use a composite index?
...nefit a query that uses those fields for joining, filtering, and sometimes selecting. It will also benefit queries that use left-most subsets of columns in that composite. So the above index will also satisfy queries that need
index( column_A, column_B, column_C )
index( column_A, column_B )
index(...
How do I delete from multiple tables using INNER JOIN in SQL server
...(you want to delete) to temporary table
INSERT INTO #DeleteIds(Id)
SELECT DISTINCT mt.MasterTableId
FROM MasterTable mt
INNER JOIN ...
WHERE ...
-- delete from first detail table using join syntax
DELETE d
FROM DetailTable_1 D
INNER JOIN #DeleteIds X
ON D.MasterTableId...