How do you drop a sequence table?
The DROP SEQUENCE statement allows you to remove a sequence from the database. In this syntax, specify the name of the sequence that you want to remove after the DROP SEQUENCE keywords. If you don’t specify the schema to which the sequence belongs, Oracle will remove the sequence in your own schema.
How do I drop all sequences in SQL?
select ‘drop table ‘ || table_name || ‘;’ from user_tables; select ‘drop sequence ‘ || sequence_name || ‘;’ from user_sequences; This will generate the script to drop all the tables and sequences.
What is drop type in Oracle?
Use the DROP TYPE statement to drop the specification and body of an object type, a varray, or a nested table type. See Also: DROP TYPE BODY for information on dropping just the body of an object type. CREATE TYPE and ALTER TYPE for information on creating and modifying types.
How do you drop a trigger?
Use the DROP TRIGGER statement to remove a database trigger from the database. The trigger must be in your own schema or you must have the DROP ANY TRIGGER system privilege. To drop a trigger on DATABASE in another user’s schema, you must also have the ADMINISTER DATABASE TRIGGER system privilege.
What is a Pseudocolumn in Oracle?
A pseudocolumn behaves like a table column, but is not actually stored in the table. You can select from pseudocolumns, but you cannot insert, update, or delete their values. A pseudocolumn is also similar to a function without arguments (please refer to Chapter 5, “Functions”.
Is drop DDL or DML?
DELETE is a Data Manipulation Language command, DML command and is used to remove tuples/records from a relation/table. Whereas DROP is a Data Definition Language, DDL command and is used to remove named elements of schema like relations/table, constraints or entire schema.
How do I drop all objects in a schema in Oracle?
select ‘drop ‘||object_type||’ ‘|| object_name || ‘;’ from user_objects where object_type in (‘VIEW’,’PACKAGE’,’SEQUENCE’, ‘PROCEDURE’, ‘FUNCTION’, ‘INDEX’); But what if this query is run by the DBA with a SYS or SYSDBA login (what all objects are present in the user_objects view when logged in using sys/sysdba user)?
Can we drop trigger in Oracle?
To drop a trigger on DATABASE in another user’s schema, you must also have the ADMINISTER DATABASE TRIGGER system privilege. Specify the schema containing the trigger. If you omit schema , then Oracle Database assumes the trigger is in your own schema. Specify the name of the trigger to be dropped.
What is drop procedure in SQL?
Description. DROP PROCEDURE removes the definition of an existing procedure. To execute this command the user must be the owner of the procedure. The argument types to the procedure must be specified, since several different procedures can exist with the same name and different argument lists.
Can we alter a sequence?
The sequence must be in your own schema, or you must have the ALTER object privilege on the sequence, or you must have the ALTER ANY SEQUENCE system privilege. The keywords and parameters in this statement serve the same purposes they serve when you create a sequence.
How do I drop an Oracle Database?
Steps To Drop Oracle Database Manually
- Step 1 : Connect to the database with sysdba privilege. $ export ORACLE_SID=mydb $ sqlplus “/ as sysdba”
- Step 2 : Shutdown the database. SQL> shutdown immediate;
- Step 3: Start the Database in Exclusive mode.
- Step 4: Drop the database.
- Step 5 : Post Change Steps.
How do you use sequence Currval?
You can access the value of a sequence using the NEXTVAL or CURRVAL operators in SQL statements. You must qualify NEXTVAL or CURRVAL with the name (or synonym) of a sequence object that exists in the same database, using the format sequence. NEXTVAL or sequence. CURRVAL.
What is DROP command explain?
DROP statement is a Data Definition Language(DDL) Command which is used to delete existing database objects. It can be used to delete databases, tables, views, triggers, etc. A DROP statement in SQL removes a component from a relational database management system (RDBMS). DROP is a DDL Command.
How do I drop an Oracle schema?
You must have the DROP USER system privilege. Specify the user to be dropped. Oracle Database does not drop users whose schemas contain objects unless you specify CASCADE or unless you first explicitly drop the user’s objects. Specify CASCADE to drop all objects in the user’s schema before dropping the user.
How do I drop a schema object?
The query below will return a statement that can be used to drop all the tables which are present in the current user A’s schema (normal scenario). select ‘drop ‘||object_type||’ ‘|| object_name || ‘;’ from user_objects where object_type in (‘VIEW’,’PACKAGE’,’SEQUENCE’, ‘PROCEDURE’, ‘FUNCTION’, ‘INDEX’);