How do I Drop all tables in sql Plus?
How do I Drop all tables in sql Plus?
select ‘drop table ‘||table_name||’ cascade constraints;’ from user_tables; This will print out a series of drop commands for all tables in the schema. Spool the result of this query and execute it.
How do I Drop all tables?
Select all of the tables in your database in the Schema Browser clicking on the first table, holding Shift, and clicking on the last table. Right-click on the selected tables and select “Drop (n) Tables…” Click on Review SQL, as we will need to add in the foreign key check disable and enable.
How do I Drop a table in Oracle?
Oracle DROP TABLE
- First, indicate the table and its schema that you want to drop after the DROP TABLE clause.
- Second, specify CASCADE CONSTRAINTS clause to remove all referential integrity constraints which refer to primary and unique keys in the table.
How do I Drop all tables from a sql Server database?
If you want to use only one SQL query to delete all tables you can use this: EXEC sp_MSforeachtable @command1 = “DROP TABLE?” This is a hidden Stored Procedure in sql server, and will be executed for each table in the database you’re connected.
What does drop table do in SQL?
We use the SQL DROP Table command to drop a table from the database. It completely removes the table structure and associated indexes, statistics, permissions, triggers and constraints. You might have SQL Views and Stored procedures referencing to the SQL table.
What happens if we drop a table?
Dropping a table removes the table definition from the data dictionary. All rows of the table are no longer accessible. All indexes and triggers associated with a table are dropped. All synonyms for a dropped table remain, but return an error when used.
Are indexes dropped when a table is dropped?
DROP TABLE removes tables from the database. DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified.
How do I force drop a table in SQL?
SQL Server DROP TABLE
- First, specify the name of the table to be removed.
- Second, specify the name of the database in which the table was created and the name of the schema to which the table belongs. The database name is optional.
- Third, use IF EXISTS clause to remove the table only if it exists.
Which syntax is used to DROP a table from a database?
SQL DROP Table command
We use the SQL DROP Table command to drop a table from the database. It completely removes the table structure and associated indexes, statistics, permissions, triggers and constraints. You might have SQL Views and Stored procedures referencing to the SQL table.
How to drop a database with SQL Plus?
The SQL*Plus command DROP DATABASE can perform this function. Start SQL*Plus and connect to the target database with administrator privileges, then ensure that the database is either mounted or open with no users connected. For example: SQL> STARTUP FORCE MOUNT
How to delete all the data from the table in sqlplus?
It will be better that you drop constraint and then use Truncate command and after getting rid of data , apply the constraint again. Try out Bulk deletion using FORALL. In that instead of deleting one row at time an entire bulk can be deleted in a single delete transaction.
How to drop all tables from a database?
Use the INFORMATION_SCHEMA.TABLES view to get the list of tables. Generate Drop scripts in the select statement and drop it using Dynamic SQL: Note: If you have any foreign Keys defined between tables then first run the below query to disable all foreign keys present in your database.
How to drop all user tables in Oracle Stack Overflow?
If you look at your output, you’ll see ‘PROCEDURE CREATED’, then executed, then ‘PROCEDURE CREATED’ again as it re-executes the last statement (EXECUTE is a SQL*Plus command, not a statement so isn’t buffered) then “PROCEDURE DROPPED” and then it tries (and fails) to drop it the second time. PS. I agree with Dougman on the odd DBMS_SQL calls.