How do I delete a dependency in SQL?

How do you delete an object in SQL?

How to safely delete SQL database objects

  1. Open SQL Server Management Studio.
  2. Right click the object that is to be deleted and select the Delete option from the drop down list:
  3. In the Delete object dialog, click the Show dependencies button:

How do I delete a schema in SQL Server?

DROP SCHEMA [IF EXISTS] schema_name; Note : Delete all objects from the schema before dropping the schema. If the schema have any object in it, the output will be an error.

How do I remove foreign key dependencies in SQL Server?

To delete a foreign key constraint

  1. In Object Explorer, expand the table with the constraint and then expand Keys.
  2. Right-click the constraint and then click Delete.
  3. In the Delete Object dialog box, click OK.

How do I delete an orphaned user in SQL Server?

Once you have identified orphan users it is extremely simple to remove them. You remove them by using the sp_revokeuser SP. Here is an example that removes the database users ‘USERX’, from the current database in use.

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How do I delete an object in SQL Developer?

Right-click on the object in the diagram, right-mouse-click, ‘Delete View. ‘ This will remove it from the SubView ONLY. If you say ‘Delete Object,’ it will remove it from the model entirely.

How do you delete something in a database?

To remove one or more rows in a table:

  1. First, you specify the table name where you want to remove data in the DELETE FROM clause.
  2. Second, you put a condition in the WHERE clause to specify which rows to remove. If you omit the WHERE clause, the statement will remove all rows in the table.

How do I delete a schema?

Use the DROP SCHEMA command to drop a schema. When you drop a schema, you drop all the objects defined within that schema. You cannot drop a schema if it is being accessed in other user sessions or if it is the default schema of the database.

How do I delete a schema in Oracle?

Just login into the schema whose objects you want to drop. Yes you can. You can drop the user and thus drop the schema objects. The DROP USER statement is used to remove a user from the Oracle database and remove all objects owned by that user.

How do you delete a table from schema?


  1. First, specify the name of the table to be removed.
  2. Second, specify the name of the database in which the table was created and the name of the schema to which the table belongs. The database name is optional. …
  3. Third, use IF EXISTS clause to remove the table only if it exists.
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How do I use delete cascade in SQL?

Use the ON DELETE CASCADE option to specify whether you want rows deleted in a child table when corresponding rows are deleted in the parent table. If you do not specify cascading deletes, the default behavior of the database server prevents you from deleting data in a table if other tables reference it.

What happens if you use inner join with no conditions?

We can use ‘cross join‘ without on condition. Cross join gives the result in cartesian product form. For instance, if in one table there are 3 records and another table has 2 records, then the first record will match with all the second table records. Then, the same process will be repeated for second record and so on.

How do I remove a foreign key from a table?

You can try it if the commands do not work.

  1. Expand your database view.
  2. Right Click on Table which has foreign key constraint. …
  3. Right click on the column which has the foreign key reference. …
  4. A list of relationships will appear (if you have one) in a pop up window.
  5. From there you can delete the foreign key constraint.