I'm working on a module to pull data from Oracle into a PowerShell data table, so I can automate some analysis and perform various actions based on the results. Everything seems to be working, and I'm casting columns into specific types based on the column type in Oracle. The problem I'm having has to do with null dates. I can't seem to find a good way to capture that a date column in Oracle has a null value.
Is there any way to cast a [datetime] as null or empty?
Here's an easy function to test if a value from a database column is NULL:
function test-sqlnull{
Param($value)
return [System.DBNull]::Value.Equals($value)
}
If you need to store a null in a datetime field, just set it to [DBNull]::Value.
I think I have a solution that will work. Rather than attempting to set the field as null or empty, I'm not setting it at all. Now the empty value can be identified by checking if the file type is [System.DBNull].
$data | ? {$_.myDate.GetType() -eq [System.DBNull]}
Related
I created a parameter [GroupID] that is used to query several datasets in my SSRS report. It is using the field [GroupID] from my GroupList_Rolling12 dataset. An example of [GroupID] is 77610N. When 77610N is selected, all of my datasets are correctly 'filtering' for this [GroupID].
I now need to create a text box that returns the [GroupName] of [GroupID]. In other words, when 77610N is selected from my GroupID parameter, I want the [GroupName] that is associated with the selected GroupID parameter to display.
I'm still very new to SSRS and cannot figure this out. I tried creating the expression =First(Fields!GroupName.Value, "GroupList_Rolling12") but that did not work since it simply returns the first value from the query.
I also tried =First(Parameters!GroupID.Value(0)) but this also did not work
I also tried this expression =Lookup(Fields!GroupID.Value, Fields!GroupID.Value, Fields!GroupName.Value, "GroupList_Rolling12")
)
Can you please help?
You can reference the parameter label directly like this
=Parameters!GroupID.Label
There is no need to put the index on the end (=Parameters!GroupID.Label(0)) unless your parameter is multi-value, in which case it would select the first selected entry.
I want to build sync method, both from my local database to parse.com and from parse.com to my local database. For first case ( from local to parse.com, Alhamdulillah my script run well. But for second case, i need query between column last_update and last_sync (i do not use updatedAt caused by i can't control it, so i use last_update).
Please explain me how to get all data if last_update is greaterThan last_sync?
From https://www.parse.com/questions/querying-between-two-dates i got query between two dates, but it's from same column, the value of query is real value. But my case, the value of key = last_update is column name, last_sync.
Thank you...
You can't use a query constraint that compares two columns. You need to change your logic. Why do you store both a last_update and last_sync in a record?
Syncing is a complex subject and you can easily mess up the logic. I don't understand how you can store a last_sync date on every record, as this has to be different for every user. You need to store the last_sync value for each user, and use that to compare against the last_update column on all records.
During working I faced a very weird thing in phpfox script
I put in the table user a new field .. and this field is tinyint with default value 0 and started to work on giving the user the ability to insert the value through links and finally it's succeeded but when I tried to get this value by getUserBy('name_of_the_field') it gave me a null value although I checked it in the database table and found that field has a value ... so could you help me please ?!
The getUserBy() does not get every field in the user table, there is a predefined list of columns that it will fetch.
You will need to get this field in a different way or write a plug-in to the hook "user.service_auth___construct_query" so it loads your new field, I have not tried this but I believe it should work as a plug-in to that hook:
$this->database()->select('u.my_new_field,');
How would I sort a DataTable using Linq? I've tried the following but received the error:
InvalidCastException was unahndled by user code. Specified cast is not allowed.
var query = from c in allFiles.AsEnumerable() orderby c.Field<DateTime>(1)
descending select c;
That would suggest that for at least some row, field 1 isn't a DateTime. If it may be null, you might want to try DateTime? instead. Or check that it really is that field in the first place... maybe use a name instead of a number?
The table was dynamically generated and had no actual specified column dataType. When I created the column and specified the dataType the issue was resolved.
I'm not sure why I didn't realize the dataType wasn't defined until after I posted this question.
I created an element with an input value of type "Day" , when i write a formula i get this error.
Any idea what's wrong?
APP-FF-33232:
EATC_EXTRA_DAYS_ENTRY_EFFECTIVE_DATE_ENTRY_VALUE has null or not found allowed, but no
default set specified.
Cause: If a Database Item has
null allowed, or not found allowed,
then the item must also specify a
default set to be used to provide
default values in the event of these
occurring. The item named has one of
these conditions allowed, but the
default set column in the
FF_DATABASE_ITEMS table is null.
Action: Please refer to your
local support representative.
-
I'm not an expert in Oracle Apps (to say the least) but the error message is fairly clear. You - or someone - have written a Fast Formula which references a database column EATC_EXTRA_DAYS_ENTRY_EFFECTIVE_DATE_ENTRY_VALUE. Apparently this column can be nullable, in which case your Formula needs to provide a default value. Something like:
default for EATC_EXTRA_DAYS_ENTRY_EFFECTIVE_DATE_ENTRY_VALUE is 01-JAN-2010
Or perhaps you can use SYSDATE or CURRENT_DATE rather than a fixed value.
Solution to error: You called database item in Fast formula,
you need to initialize the date to specific date
alias EATC_EXTRA_DAYS_ENTRY_EFFECTIVE_DATE_ENTRY_VALUE as day
default for day is 01-jan-2010