Value range:A,B,C, andPG, indicating theO,MY,TD, andPOSTGRESdatabases, respectively. For A compatibility, the database treats empty strings asNULLand replacesDATEwithTIMESTAMP(0) WITHOUT TIME ZONE. When a character string is converted to an integer, if the input is invalid, the input will...
The following code adds an SSN# field and then creates a unique index for SSN#. The index forces all non-Null values to be unique, but allows Null values when the value of the SSN# field isn't known. In this example, strDbPath is the path to the NorthwindTables database: ...
= null, var location: String? = null, var owner: String? = null, ) { @Backlink(to = "image") lateinit var users: ToMany<ImageUser> } @Entity data class ImageUser( @Id var id: Long = 0, var user: String? = null ) { lateinit var image: ToOne<Image> } object MyEntitiesMock...
private void NotifyPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } #endregion } In the MainPage class, above the class constructor, add the following code. This code declares a private data context named...
lpszSQL Pointer to a null-terminated string containing a valid SQL command to execute. You can pass a CString.RemarksCreate the command as a null-terminated string. ExecuteSQL does not return data records. If you want to operate on records, use a recordset object instead....
We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your results more quickly Cancel Create saved search Sign in Sign up Reseting focus {...
checking for non null values in a column checking if a connection is valid Checking if a specific handler exists Checking if an ObservableCollection contains a specific object Checking if command line arguments are empty. checking if elements with values exists in xml Checking overlaps on dates in...
Deadlock on Generic Waitable Object - Coalesce v IsNull? Deadlock on page lock during two simple delete commands Deadlock on primary key during Update Deadlock on Select..Into in Transaction Deadlock when using SqlBulkCopy to concurrently insert rows into a single non-empty table Deadlock ...
6: errors = null; 复制 7: if (string.IsNullOrEmpty(templateFullPath)) 复制 8: return string.Empty; 复制 9: 复制 10: VSDBCustomHost host = new VSDBCustomHost(); 复制 11: Microsoft.VisualStudio.TextTemplating.Engine engine = new Microsoft.VisualStudio.TextTemplating.Engine(); 复制...
[LastUpdatedBy] [varchar](10) NOT NULL, [LastUpdated] [datetime] NOT NULL) ON [PRIMARY] Insert into CreditLimit VALUES ('P', 500000, 'RAHUL', GetDate()) -- PlatinumInsert into CreditLimit VALUES ('G', 100000, 'RAHUL', GetDate()) -- GoldInsert into CreditLimit VA...