Display names of all constraints for a table in Oracle SQL

Question

I have defined a name for each of the constraint for the multiple tables that I have created in Oracle SQL.

The problem is that to drop a constraint for the column

Answer 1

Use either of the two commands below. Everything must be in uppercase. The table name must be wrapped in quotation marks:

--SEE THE CONSTRAINTS ON A TABLE
SELECT COLUMN_NAME, CONSTRAINT_NAME FROM USER_CONS_COLUMNS WHERE TABLE_NAME = 'TBL_CUSTOMER';

--OR FOR LESS DETAIL
SELECT CONSTRAINT_NAME FROM USER_CONSTRAINTS WHERE TABLE_NAME = 'TBL_CUSTOMER';