When a table is referenced by a FOREIGN KEY constraint, direct deletion becomes impossible. To address this, you must first delete the referencing table before you can drop the target table successfully. Moreover, the DROP TABLE command does not delete functions, stored procedures, or views that...
The SQL Server Native Client OLE DB provider exposes some SQL Server PRIMARY KEY and UNIQUE constraints as indexes. The table owner, database owner, and some administrative role members can modify a SQL Server table, dropping a constraint. By default, only the table owner can drop an existing...
To drop constraints, use the ALTER TABLE statement with the DROP or DROP CONSTRAINT clauses. This allows you toBINDand continue accessing the tables that contain the affected columns. The name of all unique constraints on a table can be found in the SYSCAT.INDEXES system catalog view. Procedur...
In the following example, DROP TABLE tries to remove a table that has several projections associated with it. Because it omits the CASCADE option, Vertica returns an error:=> DROP TABLE d1; NOTICE: Constraint - depends on Table d1 NOTICE: Projection d1p1 depends on Table d1 NOTICE: ...
This PR adds support for dropping thecheckConstraintstable feature using theALTER TABLE ... DROP FEATUREcommand. It throws an error if the table still contains CHECK constraints (as dropping a feature should never change the logical state of a table). ...
In version 3.1 and earlier, if at all you ever decide that you don’t want the default on “col2”, you could issue a statement like this: ALTER TABLE foo DROP CONSTRAINT cons; Here, the default for “col2” as declared above will be stored as a constraint with name “cons”, so...
ORA-00001: unique constraint (SYS.I_PROCEDUREPLSQL$) violatedChangesCauseSign In To view full details, sign in with your My Oracle Support account. Register Don't have a My Oracle Support account? Click to get started!In this DocumentSymptomsChanges...
AND i.is_unique = 0 AND i.is_unique_constraint = 0 ... The query above is missing Unique and Primary Key constraints exclusions and you can break your application if you don’t filter out “unused” indexes that are also Unique and Primary Key constraints. ...
Example To define dimensions using the command line, use the ADD CONSTRAINT option of the ALTER TABLE statement. For example, the following SQL statement adds a unique constraint to the EMPLOYEE table that represents a new way to uniquely identify employees in the table: ...
Any object in the database can then use this reclaimed space. Deleting an index and dropping an index are synonymous. You cannot drop an index used by either a PRIMARY KEY or UNIQUE constraint, except by dropping the constraint. By modifying the index, for example, to modify the fill ...