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Can we create synonym for view in Oracle?
You can create a synonym for a table or a view that doesn’t exist, but the target table or view must be present before the synonym can be used. Synonyms share the same namespace as tables or views. You cannot create a synonym with the same name as a table that already exists in the same schema.
How do I create a synonym in Oracle SQL Developer?
Specify the schema to contain the synonym. If you omit schema , then Oracle Database creates the synonym in your own schema. You cannot specify a schema for the synonym if you have specified PUBLIC . Specify the name of the synonym to be created.
Why do we create synonym in Oracle?
A synonym is an alternative name for objects such as tables, views, sequences, stored procedures, and other database objects. You generally use synonyms when you are granting access to an object from another schema and you don’t want the users to have to worry about knowing which schema owns the object.
What is schema and synonym in Oracle?
A synonym may have the same name as the underlying object, provided the underlying object is contained in another schema. Oracle Database Resolution of Synonyms: Example Oracle Database attempts to resolve references to objects at the schema level before resolving them at the PUBLIC synonym level.
What is the difference between view and synonym in Oracle?
View can be created using multiple tables. View is logical and does not occupies space. Synonym can be created for single table, view, sequence or index. Synonym is physical and needs space.
What is schema in SQL?
A schema is a collection of database objects like tables, triggers, stored procedures, etc. A schema is connected with a user which is known as the schema owner. Database may have one or more schema. SQL Server have some built-in schema, for example: dbo, guest, sys, and INFORMATION_SCHEMA.
Can we create synonym with the same name in same schema?
Don’t create a public synonym with the same name as the exiting schema. If you create a public synonym and it subsequently has dependent tables or dependent valid user-defined object types, then you cannot create another database object of the same name as the synonym in the same schema as the dependent objects.
Can a person be an oracle?
The definition of an oracle is a person with great wisdom or someone believed to have communication with a deity. An example of an oracle is someone who has conversations with God. A person such as a priest through whom the deity is supposed to respond with prophecy or advice.
Can we update 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.
Does synonym occupy space in Oracle?
View is logical and does not occupies space. Synonym can be created for single table, view, sequence or index. Synonym is physical and needs space.
How to create a synonym for a schema?
The CREATE SYNONYM statement allows you to create a synonym which is an alternative name for a database object such as a table, view, sequence, procedure, stored function, and materialized view. Here is the basic syntax of creating a new synonym: CREATE [ OR REPLACE] [ PUBLIC] SYNONYM schema.synonym_name FOR schema.object;
How do you create a synonym in Oracle?
Here is the basic syntax of creating a new synonym: First, specify the name of the synonym and its schema. If you skip the schema, Oracle will create the synonym in your own schema.
What are the types of schema objects in Java?
The schema object for which you are creating the synonym can be of the following types: Table or object table View or object view Sequence Stored procedure, function, or package Materialized view Java class schema object User-defined object type Synonym
Can you create a synonym with the same name?
If you create a public synonym and it subsequently has dependent tables or dependent valid user-defined object types, then you cannot create another database object of the same name as the synonym in the same schema as the dependent objects. Take care not to create a public synonym with the same name as an existing schema.