Does drop table drop synonym?

DROP TABLE does not remove any synonyms for the table that were created in an external database.

Which command is used to delete a synonym?

Use the DROP SYNONYM command to drop a synonym.

Can we drop a synonym?

To drop a private synonym, either the synonym must be in your own schema or you must have the DROP ANY SYNONYM system privilege. To drop a PUBLIC synonym, you must have the DROP PUBLIC SYNONYM system privilege. You must specify PUBLIC to drop a public synonym.

Can we drop a sequence and a synonym?

synonym_name [force]; PUBLIC. Allows you to drop a public synonym. If you have specified PUBLIC, then you don’t specify a schema.

Does DROP TABLE drop constraints?

DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified.

What is DROP TABLE if exists?

Description. The DROP TABLE statement deletes the specified table, and any data associated with it, from the database. The IF EXISTS clause allows the statement to succeed even if the specified tables does not exist.

What is difference between DROP TRUNCATE and delete?

The DROP command removes a table from the database. All the tables’ rows, indexes, and privileges will also be removed. DROP and TRUNCATE are DDL commands, whereas DELETE is a DML command. DELETE operations can be rolled back (undone), while DROP and TRUNCATE operations cannot be rolled back.

What’s difference between TRUNCATE and delete?

The DELETE statement removes rows one at a time and records an entry in the transaction log for each deleted row. TRUNCATE TABLE removes the data by deallocating the data pages used to store the table data and records only the page deallocations in the transaction log.

Can we alter synonym in Oracle?

Use the ALTER SYNONYM statement to modify an existing synonym. To modify a private synonym in another user’s schema, you must have the CREATE ANY SYNONYM and DROP ANY SYNONYM system privileges. If you omit schema , then Oracle Database assumes the synonym is in your own schema.

How do I fix synonyms is no longer valid?

Resolving The Problem Cause: The synonym used is based on a table, view, or synonym that no longer exists. Action: Replace the synonym with the name of the object it references or recreate the synonym so that it refers to a valid table, view, or synonym.

How do you create a drop sequence?

The syntax to a drop a sequence in Oracle is: DROP SEQUENCE sequence_name; sequence_name. The name of the sequence that you wish to drop.

Which SQL command helps us to drop a sequence?

Use the DROP SEQUENCE statement to remove a sequence object from the database. This statement is an extension to the ANSI/ISO standard for SQL.

When to drop a synonym in Oracle Database?

Specify the name of the synonym to be dropped. If you drop a synonym for the master table of a materialized view, and if the defining query of the materialized view specified the synonym rather than the actual table name, then Oracle Database marks the materialized view unusable.

How to remove a synonym from the database?

The DROP SYNONYM statement allows you to delete a synonym from the database. Here is the basic syntax of the DROP SYNONYM statement: First, specify the name of the synonym that you want to remove after the DROP SYNONYM keyword.

Can a drop table be used to delete data?

The DROP TABLE is another DDL (Data Definition Language) operation. But it is not used for simply removing data from a table; it deletes the table structure from the database, along with any data stored in the table. Here is the syntax of this command:

How do you delete a synonym in Oracle?

If the synonym belongs to a schema, you must specify its schema name. If you skip the schema name, Oracle will assume that you delete the synonym in your own schema. Second, use the FORCE keyword to delete the synonym even if it has dependent tables or user-defined types.