What is Oracle reference table?

What is Oracle reference table?

Abstract: Reference tables are designed to support applications using a relational database management system like Oracle or Sybase. The information in these tables changes over the time. Each table is analyzed and stored as metadata.

What is reference table in database?

In the context of database design a reference table is a table into which an enumerated set of possible values of a certain field data type is divested. It is also called a domain table because it represents the domain for the columns that reference it.

How can I find which tables reference a given table in Oracle?

1 Answer

1. select table_name, constraint_name, status, owner.
2. from all_constraints.
3. where r_owner = :r_owner.
4. and constraint_type = ‘R’
5. and r_constraint_name in.
6. select constraint_name from all_constraints.
7. where constraint_type in (‘P’, ‘U’)
8. and table_name = :r_table_name.

What is a reference table in SQL?

In the context of database design a reference table is a table into which an enumerated set of possible values of a certain field data type is divested.

What is the use of %type attribute?

The type attribute is most often used on linking elements to describe the target of a cross-reference. It is also used on the note element to describe the type of the current note, and on several other elements for varying purposes.

Where is reference table in SQL Developer?

1. Add the extension to SQL Developer: Tools > Preferences. Database > User Defined Extensions. Click “Add Row” button.
2. Navigate to any table and you should now see an additional tab next to SQL one, labelled FK References, which displays the new FK information.

What is the purpose of a reference table?

Reference tables are used to store information that is commonly used to set up context and describe other business keys. In many cases, these are standard codes and descriptions or classifications of information.

How do you make a reference table?

Procedure

1. On the View Summary pane, click View Details.
2. Click Reference Tables > New Reference Table.
3. On the New Reference Table pane, type a Name for the reference table.
4. Select the type of reference table that you want to create.
5. Optional: In the Definition field, type a description for the reference table.

How can I list all foreign keys referencing a given table in Oracle?

First method is with table Constraints tab (select table and select Constraints tab). Tab lists table constraints – primary, unique and foreign keys and check constraints – all in one grid. Foreign keys are the ones with ‘Foreign_Key’ value in CONSTRAINT_TYPE column. R_TABLE_NAME holds primary table name.

What is type tag?

An informal definition of Top’s “side tag” is a language system or engine that “act likes” it has a side tag to indicate types other than the value itself. “Acts like” is used to avoid prematurely tying it to actual implementation.

What is attribute and type?

An attribute is a property or characteristic of an entity. An entity may contain any number of attributes. One of the attributes is considered as the primary key. There are five such types of attributes: Simple, Composite, Single-valued, Multi-valued, and Derived attribute.

How do you check if a table is being used in Oracle?

V$SESSION_WAIT can be sampled to get a better idea of which tables and indexes are being used and who is using them. And if you need an accurate view, and you’re licensed for the Diagnostic Pack, you can use V$ACTIVE_SESSION_HISTORY to review how frequently a table or index has been used over time.