Access, Access 2000, Access 2003, Access 2003 forms, Access 2007, Access 2007 forms, Access 2007 functions, Access control, Access Database, Access forms, Access Points, Access query, Access Tables, BLOB, Clustering, CSV, Database administration, Database connectivity, Database design, Database issues, Database management, Database Management Systems, Database migration, DB2, DB2 administration, DB2 Universal Database, DB2/400, DBA, DBMS, Embedded SQL, Flat files, FoxPro 2.6, IIF function, IIF statement, INSERT statement, JDBC, JOIN statement, Microsoft Access, Microsoft Access 2003, Microsoft Access 2007, Microsoft Access 2010, Microsoft Access forms, Microsoft Access subforms, MySQL, MySQL Database, ODBC, Query optimization, SQL queries, Sybase, Triggers VIEW ALL TAGS
I have made a program in VB with Access as back end. In the data base there are three fields which are unique id of a person. I want to display "Already Exist" message box when i enter an already existing id. matching all three fields and not allow duplicate entry.
there was a ms access database in which there 3 to 4 values same so i want to delete the values keeping only one value. so i need a query.