EDN InterBase / Design / Index Feedhttp://edn.embarcadero.com/interbase/design/index2013-06-18T19:22:59-07:001Object In Use error when adding a foreign keyBorland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/250782000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00InterBase 4.x solves the problemIndexes Cannot be Created on COMPUTED BY Columns.Borland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/251202000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00Generates error: unsuccessful metadata update, attempt to index COMPUTED BY column in INDEX <name of index>Creating Foreign Keys With the ALTER TABLE CommandBorland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/251842000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00InterBase requires an exclusive lock on the database to create foreign key referenceswhat is the maximum length of the fields that comprise an indexBorland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/252452000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00The general rule here is that the total length of all fields must not be over 200 bytes.Do I Still Need to Backup and Restore to Balance my Indexes?Borland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/254712000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00Backup and Restore is still recommendedWhat does "SQLCODE -607 -- Unsuccessful Metadata Update" Mean?Borland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/254802000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00Error indicates an attempt to create an index with a name that already exists.How to determine if a set of columns have unique values for rows in a tableBorland Staffhttp://gp.codegear.com/authors/edit/46.aspxhttp://edn.embarcadero.com/article/257082000-07-24T00:00:00-07:002000-07-24T00:00:00-07:00You can run a query to see if there duplicates