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How can I defensively code against randomly referencing "Table 0" and null values?


How can I defensively code against randomly referencing "Table 0" and null values?

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How can I defensively code against randomly referencing "Table 0" and null values?
Tag : chash , By : jaredsmiller
Date : November 27 2020, 09:01 AM

I hope this helps you . As jmcilhinney suggests, tweaking the CommandTimeout value seems to have been the ticket/done the trick.
I originally made the SqlCommand's CommandTimeout value 300 (5 minutes), but with that I got "Context Switch Deadlock occurred." So I then reduced it to 120 (2 minutes), and that seems to be more or less the "sweet spot" for me. I did get "Timeout expired" one time out of several tests, but when I retried the same exact range, it completed successfully the second time, so I guess it's just "one of those things" - 120 will sometimes not be enough of a timeout, but 300 is apparently too much. IOW, this balancing act between too little and too much doesn't appear to be "an exact science."

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Setting up table relations what do "Cascade", "Set Null" and "Restrict" do?


Tag : mysql , By : amy
Date : March 29 2020, 07:55 AM
I wish this helpful for you CASCADE will propagate the change when the parent changes. (If you delete a row, rows in constrained tables that reference that row will also be deleted, etc.)
SET NULL sets the column value to NULL when a parent row goes away.

LINQ to SQL generate "null" instead of "not null" from sql server function "return table as&quo


Tag : sql-server , By : user184406
Date : March 29 2020, 07:55 AM
Hope this helps The problem is that SQL Server considers the Ranking column from your GetFilteredRealtyFulltext function to be nullable even though the underlying table column is created as NOT NULL. You can see this by running the following query against your database:
select 
o.name ObjectName,
c.name ColumnName,
c.is_nullable ColumnIsNullable
from 
sys.all_objects o 
inner join 
sys.all_columns c 
on 
o.object_id = c.object_id 
where 
o.[name] = 'GetFilteredRealtyFulltext'
CREATE TABLE [dbo].[Realty]
(
[Id] [int] IDENTITY(1,1) NOT NULL,
...
...
[RankingBonus] [int] NOT NULL,
[Ranking]  AS ISNULL([Id]+[RankingBonus], 0) PERSISTED NOT NULL,
...
)
CREATE FUNCTION [dbo].[GetFilteredRealtyFulltext]
(@fulltextcriteria nvarchar(4000))
RETURNS TABLE
AS
RETURN (SELECT 
realty.Id AS realtyId,
realty.RankingBonus,
ISNULL(realty.Ranking, 0) as Ranking  --ISNULL hack
FROM realty
)
GO

Referencing a "partition table" foreign key in Multi-Tenant Code-First Entity Framework


Tag : entity-framework , By : inquiringmind
Date : March 29 2020, 07:55 AM
To fix this issue The problem is that you're using [ForeignKey("ItemId")] to describe part of the relationship between StoreItem and Item but Item has multiple key columns. If you need the TenantId to be part of the key -- which you shouldn't if ItemId is enough to uniquely identify an Item record -- then I think you'd need to use the fluent API to define the relationship.
On the other hand, I'm guessing you don't need TenantId as a key column for either Item or Store, which would simplify things greatly.

VBA Code to Paste SQL Query in Excel with NULL values pasted as "NULL"


Tag : sql , By : Tonci Grgin
Date : March 29 2020, 07:55 AM
wish helps you I think it is easier to change the SQL query rather than the VBA code. If you later post the code of your query I could see if what I'm thinking applies, but nevertheless, you could try this:
Suppose the column you want to query and change the values is called Column1
SELECT [...,] IIF(Column1 IS NULL, 'NULL', Column1) [,...] FROM...

conflicting NULL/NOT NULL declarations for column "id_bank_card" of table "bill"


Tag : sql , By : chintown
Date : March 29 2020, 07:55 AM
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