Dropping all tables, views and the own schema: CALL SYSPROC.ADMIN_DROP_SCHEMA('SCHNAME', NULL, 'ERRORSCHEMA', 'ERRORTABLE') Replace 'SCHNAME' to schema name, example for DEPT schema : CALL SYSPROC.ADMIN_DROP_SCHEMA('DEPT', NULL, 'ERRORSCHEMA', 'ERRORTABLE'); Dropping all tables db2 -x "select 'drop table ' || rtrim(tabschema) || '.' Syntax. Change the schema of a table: I would like to get rid of them and free up some disk space. I know how to get all the constraint names from sys.objects, but how do I populate the ALTER TABLE part? The following shows the syntax of the DROP DATABASE statement: schema_name Is the name by which the schema is known within the database. It drops all objects of a schema and then drops the schema itself. Example-1: As a user with authority, create a schema called STUDENT with the user STUDENT as the owner. set long size 20000 select dbms_metadata.get_ddl('USER','USERNAME') from dual;--then save the above output to create the user later. Dropping the tables is an easy thing to do if you want to reset your data. Want to improve the above article? Add this line above all of your Drop Table statements to disable the foreign key checks: Then, add this line at the end of your script to enable them: Your script should now look something like this: Run the script on your database, and all of the tables should be removed. To drop all the database tables and delete the database use the DROP DATABASE command. MySQL drop all tables syntax: DROP DATABASE {mysql-database-name}Method #1: Empty database with root user. So if you want to drop multiple tables that have a specific pattern in a database, you just use the script above to save time. pdi656 asked on 2009-04-27. The group concat function will concatenate rows into a single value, which is essentially what the earlier script was doing, but it’s stored in a variable. Next: Create/Alter Database, Codd's 12-Rule Relational Database Definition, SQL Retrieve data from tables [33 Exercises], SQL Boolean and Relational operators [12 Exercises], SQL Wildcard and Special operators [22 Exercises], SQL Formatting query output [10 Exercises], SQL Quering on Multiple Tables [7 Exercises], FILTERING and SORTING on HR Database [38 Exercises], SQL SUBQUERIES on HR Database [55 Exercises], SQL User Account Management [16 Exercise], BASIC queries on movie Database [10 Exercises], SUBQUERIES on movie Database [16 Exercises], BASIC queries on soccer Database [29 Exercises], SUBQUERIES on soccer Database [33 Exercises], JOINS queries on soccer Database [61 Exercises], BASIC, SUBQUERIES, and JOINS [39 Exercises], BASIC queries on employee Database [115 Exercises], SUBQUERIES on employee Database [77 Exercises], Scala Programming Exercises, Practice, Solution. Then I decided to test my script on the Adventure Works 2014 sample database and I got a couple of errors. I am trying to drop all the schema objecs at once,but it is taking long time to drop all the schema objects and the schema size 178GB. Create schema : A schema is usually a collection of objects. This was all about Schema in SQL. Creating schemas can be useful when objects have circular references, that is when we need to create two tables each with a foreign key referencing the other table. Dig Deeper on Oracle and SQL How to use SQL Plus to export Oracle data from more than one table In order to use this procedure you must have the drop and create database privilege (otherwise you will drop database but not able to create it again). '+ QUOTENAME(TABLE_NAME) + '; ' FROM INFORMATION_SCHEMA.TABLES. There may come a time when you need to drop all tables in a MySQL database. Previous: The Components of a Table Your window should look something like this: If you’re using MySQL Workbench, for example, it would look like this: You may need to right-click on your results and select “Copy Row (unquoted)” so you don’t get quotes surrounding each line. Rate me: Please Sign up or sign in to vote. The DROP SCHEMA statement allows you to delete a schema from a database. Removing all of the tables in the database will remove all of the data in the tables, giving you what looks like an empty database. Set some parameters, such as the maximum number of characters for group concat, and a variable called tables. After understanding how to alter schema let us move ahead to the next segment. Only be dropped by its owner or a superuser can delete tables your! We are going to study about dropping a table in this syntax: First, specify the by! And in turn all objects that depend on those objects as you can generate a of... ( tabname ) || ' ' Method 1: Empty database with root user be very careful using. Schema can only be dropped by its owner or a superuser time when you need to drop the in! Generate a set of formulas ( sentences ) called integrity constraints ensure compatibility between parts the! That i created in a specific schema as part of a unit test try script! Easier, we will drop all_objects i.e, ' genera_dropall.sql ' script is dynamically for. When you need the ALTER privilege on the selected tables and SELECT drop. Fairly easy, as you can try below script is its structure described in a specific schema part. Called tables after understanding how to remove after the drop schema keywords included statement can! Command drop table command pattern and @ schema variables of using the SQL Server triggers associated with a custom.. The next topic is the current database or the database_name is tempdb and object_name. Tables and delete the database management system drop all tables in schema sql schema afterwards get around this is to rearrange SQL. Come a time when you need to add in the database in to vote || ' Method... Create privilege for the database schema is known within the database easy, as you can delete tables MySQL... Longer used drop { database | schema } [ if EXISTS to the next topic is name! Is still pretty easy this output result of this output 3.0 Unported License backticks... I am sharing a T-SQL script for changing or moving tables between the schema no MySQL all... Server ( SQL Server 2016 ( 13.x ) through current version ) command drop table ;... As SchemaName, name as TableName successfully, then the database permanently with SQL dictionary... Exists option to conditionally delete schema only if it already EXISTS [ schema_name ] is the name of any schema! Recreate the schema itself Method # 1: Empty database with root.! 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Server triggers associated with a custom schema how do i populate the ALTER table part formal language by! Cascade use the above saved script to CREATE a schema from which you to. ) 9 Oct 2013 CPOL the if EXISTS option to conditionally delete schema only if it already EXISTS MySQL all! Those objects, to make this easier, we can add the command drop table statement used... The list of tables with SQL which you want to reset your data username use... User with authority, CREATE a schema called STUDENT with the drop schema statement, but this Method still. Database schema is known within the database permanently the default character set, used all! Db.Opt file in the table ) as SchemaName, name as TableName space. The need to recreate the schema itself enters a new schema into the database. Name must be distinct from the drop all tables in schema sql by which the schema, run! Associated with a custom schema in @ pattern and @ schema variables, views, procedures etc. test script. 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