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...
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...
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...
And there are more complicated cases of course; for example, if the column you want to drop participates in an index or constraint, you will need to drop or disable those in order to drop the column. You can also run into trouble if the table is invo...
A lightweight client for managing MariaDB, MySQL, SQL Server, PostgreSQL, SQLite, Interbase and Firebird, written in Delphi - Issue #1605: support dropping table indexes on SQLite · HeidiSQL/HeidiSQL@1eff7a5
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...
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. ...
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...
1. Graphically using SQL Server Management Studio (SSMS) or 2. Using a Query To create the database graphically 1. Right Click on Databases folder in the Object explorer 2. Select New Database 3. In the New Database dialog box, enter the Database name and click OK. ...
In this blog post, we’ll look at how to get rid of the unused Foreign Key (FK) constraint and/or related columns/keys with help of pt-online-schema-change and the power of its plugins.