A primary key is a field or set of fields with values that are unique throughout a table. Values of the key can be used to refer to entire records, because each record has a different value for the key. Each table can only have one primary key. Access can automa...
Navicat supports importing all primary key and foreign key settings from Access data. Related articles Why could I not successfully import the XML file? Why am I receiving a 'No Primary Key' warning when I open my table? How do I enable all the import...
When you specify a primary key constraint for a table, the Database Engine enforces data uniqueness by automatically creating a unique index for the primary key columns. This index also permits fast access to data when the primary key is used in queries. If a primary key constraint is define...
An application should gain access to driver-specific columns by counting down from the end of the result set rather than specifying an explicit ordinal position. For more information, see Data Returned by Catalog Functions.Expand table Column nameColumn numberData typeComments TABLE_CAT (ODBC 1.0...
also permits fast access to data when the primary key is used in queries. If a primary key constraint is defined on more than one column, values can be duplicated within one column, but each combination of values from all the columns in the primary key constraint definition must be unique....
Accelerates Data Access What It Means:Each primary key has a unique index, which is like a super-efficient filing system. Why It’s Great:It causes your database to run much quicker, mainly by speeding up specific searches through direct location as would be seen turning directly to the pag...
AccessString (Windows) One-step Procedure Topic Template (Windows) The Accessibility Word List (Windows) Index (Windows) CD3D11_DEPTH_STENCIL_DESC class (Windows) Ordinal element (Windows) Version element (Windows) IDeviceController::remove_DeviceArrival method (Windows) How Windows Movie Maker Intera...
" The installation of this package failed " in MIcrosoft Access database engine 2010 "[Microsoft][ODBC Microsoft Access Driver]General error Unable to open registry key Temporary (volatile) Ace DSN for process" "Attachment" data type in SQL Server 2012 "Cannot define field more than once" mess...
2002. My Access 2007 displays foreign characters without any problems. Also, please note that MS Access 2002 is no longer supported by Microsoft since 2011. You can check its life cycle here:http://support.microsoft.com/gp/lifeSelectOffIt looks like you should consider upgrading your Access. ...
“Primary key is a value, or a combination of few values from the table, uniquely defining each record in this table. If we know this value/combination, we can easily find the related record and access all remaining values from that record.” ...