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Closed 10 years ago.
I am using this LINQ query
var db = new XYZ();
var product = (from cp in db.CatalogProducts
where cp.ProductID == productId
select cp).FirstOrDefault();
Running this query gives me an error
Invalid column name 'Cracker Cruncher'.
Invalid column name 'crushing torque'.
Invalid column name 'Slicing velocity'.
Can any one help me in this matter?
Gautam
Issue Resolved.. Just now I checked that Some1 has made drastic changes to DB without informing me.. Thanks for keeping up with me
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I was wondering if you can help with below
I need to write have a conditional column for 3 month prior to review date
So, I have "review dates" column which contains review dates, and need something along the lines of "IF 3 months left before "Review Date" them then ALERT, otherwise NO ALERT"
Ideally to have rolling code so I don't have to alter it manually every time dates change
Any help will be greatly appreciated
Not sure how to approach
Yeap, I guess you can! but compare against what ? Today's date? If It is so, then Please create a new calculated column, and try this code! let me know If It is what you are looking for!
Logical_Result =
VAR NowIsTheTime =
NOW ()
RETURN
IF (
DATEDIFF ( YourTable[ReviewDate], NowIsTheTime, MONTH ) < 3,
"ALERT",
"NO ALERT"
)
If we test it on a table as column, It gives us:
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Closed 6 years ago.
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I have a problem about my visual basic 6 program, I want to add an error message when a duplicate value is added by the user (I'm using SQL database). I tried a lot of codes but none of these works, I just deleted some of it. Here's the code. What code should I put to make it run? Please help, thanks in advance.
It is just a sample one, and I'm going to put the code to my original program if i am going to make it run.
You need to specify what do you consider as a duplicate line. A line with a IDNO that already exists or a line with IDNO and NAME that already exists?
Regardless the answer, you need to:
Define a unique key containing the fields that cannot have duplicate values. You must find out how to do that in your database management system. By doing that, you will have the guarantee that you will never have a duplicate line in your database.
Add a previous query to your code where you verify if there is a line in your table that already has the values you are trying to insert.
There are a number of ways to do this.
You could trap the error and check the error code/message, if it is "VIOLATION OF PRIMARY KEY CONSTRAINT" display the error message of your choice.
Personally I would check to see if it exists before the insert and if it does display the "The data you are trying to add already exists" message (or whatever it is you want to display).
On a side note you should look at Parameterized Queries. The query you have is open to SQL Injection. Take a look at this
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Closed 10 years ago.
I try to import 90 records from a .txt-file into a table in: Administration > Administration Area > Periodic > Data export/import > Definition Groups
I've made a new Definition Group, set the name and type (Custom) of it and Selected the Default file name.
In the Table setup I deleted all records and selected the table where I want to import the records, Import status = Import.
After clicking on the import-button in the Definition group-window I'm getting error-messages for every record and no data is imported:
ERROR message sais: Cannot create a record in ZIP/postal Codes (CLIAddressZipCode).
ZIP/postal Code: , . The record already exists.
EXAMPLE OF A RECORD:
1440;Les Frèchaux;175557;BRAINE-LE-CHÂTEAU
The 1st field is the zipcode, the 2nd is the street, the 3rd is the ID, the 4th field is the city.
UPDATE:
I will try to add an if-statement: to check if the record already exists, if not the record will be inserted.
Check for unique indexes in table CLIAddressZipCode (this is not a standard table).
This problem arises when your input contain two records which have the same values in the index fields.
The second record will throw the error when inserted saying: The record already exists.
It's probably a related table that it's inserting into and/or a blank '' record at the very beginning/end. CLIAddressZipCode is custom. Perhaps you're inserting into AddressZipCode, and there is code that will insert into CLIAddressZipCode or vice versa and one of those tables contains the duplicate data.
Could the data be concatenated in some way? eg 12345 is concatenated to 1234 which is the same as 1234.
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Closed 11 years ago.
I have been tried the following query and it succeeds (only returns the one record with exact match):
def self.search(query)
where("name like ?", query)
end
SQL Executed:
SELECT `products`.* FROM `products` WHERE (name LIKE 'Game')
This query also succeeds (It returns multiple records and there are multiple records with the words 'Game' in their name):
def self.search(query)
where("name like ?", "%Game%")
end
SQL Executed:
SELECT `products`.* FROM `products` WHERE (name like '%Game%')
However when I attempt place a wildcard character with interpolation:
def self.search(query)
where("name like ?", "%#{query}%")
end
SQL Executed:
SELECT `products`.* FROM `products` WHERE (name like '%[\"Game\"]%')
It doesn't return anything. Knowing me...probably missing a comma or something. Thanks in advance...
You are passing an Array instead of a String.
Try:
def self.search(query)
where("name like ?", "%#{query[0]}%") unless query.empty?
end
If it succeeds then fix the query input to be sent as string and not an Array.
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Closed 12 years ago.
I have a Generic List of objects. Those objects have 4 properties. 3 are set by LINQ earlier in the app. Is it possible to insert the 4th property into the existing List using LINQ to SQL without looping through each object in the List?
EDIT
For reference sake, one of the first properties is an ID on the record, so I will know with each object in the List what the 4th property should be in the database, but I was hoping to do it without a For Loop as the List might be rather huge.
I'm not sure I 100% understand, but in your LINQ query you could do something like this:
var result = from r in Repository
select new MyType()
{
Value1 = r.Value1,
Value2 = r.Value2,
Value3 = r.Value3,
Value4 = "MyValue",
}
Untested, but the general idea should work.