In Oracle SQL, constraints enforce rules on data stored in a table. Constraints can be used to enforce data integrity, such as ensuring that a column always contains a specific type of data or that a column always has a value.
If you want to see the names of all constraints for a table in Oracle SQL, you can use the USER_CONSTRAINTS system view. The USER_CONSTRAINTS view provides information about constraints defined in the database, including the name of the constraint, the type of constraint, and the table to which the constraint applies.
Here's an example of how you can use the USER_CONSTRAINTS view to display the names of all constraints for a table in Oracle SQL:
SELECT CONSTRAINT_NAME
FROM USER_CONSTRAINTS
WHERE TABLE_NAME = 'table_name';
In this example, the SELECT statement retrieves the value of the CONSTRAINT_NAME column from the USER_CONSTRAINTS view, where the TABLE_NAME column is equal to 'table_name'. This returns a list of all constraints for the specified table.
In conclusion, to display the names of all constraints for a table in Oracle SQL, you can use the USER_CONSTRAINTS system view. By using this view, you can easily see all constraints defined for a table and understand how the data in the table is being controlled.
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