A schema is a logical database object holder. This example will drop all tables from the public schema.. DROP SCHEMA public CASCADE; CREATE SCHEMA public; If you want to drop tables from another schema, replace public with the name of your schema.. E.g. Conditionally drops the schema only if it already exists. SCHEMA_NAME(schema_id) As SchemaName , name As TableName. || TABLE_NAME || ' CASCADE CONSTRAINTS;' from ALL_TABLES where TABLE_NAME like 'APX_%' and OWNER = 'OWNER_NAME' This will create a SQL statement for each table on separate rows, allowing you to copy and paste the result into SQL Dev and run it as a script. You can get a list of all tables in your MySQL database by running this query: Replace the word “database_name” with the name of your database. || rtrim(tabname) || ' ' Copying this list to an SQL window Here, TABLES view is used to get the list of tables. Login as MySQL root or admin user to drop atomstore database: One way to get around this is to rearrange your SQL statements to drop the tables in a suitable order. I want to drop all default constraints, check constraints, unique constraints, primary keys and foreign keys from all tables in a SQL Server database. Example-2: Create a schema that has an student details table. To execute a CREATE SCHEMA statement, Oracle Database executes each included statement. We are going to study about dropping a schema. To drop all the database tables and delete the database use the DROP DATABASE command. In this syntax: First, specify the name of the schema from which you want to remove after the DROP SCHEMA keywords. A) Drop a table that does not exist. I need a query to drop all tables and stored procedures from a database so that i create a new tables in MSSQL 2008 without affecting other databases. 1.Drop all tables by deleting the schema. DROP SCHEMA removes schemas from the database. Identifies the user who is the owner of the schema. Background . These characteristics are stored in the db.opt file in the database directory. 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. I want to cleanup a database that has several schemas that are no longer used. ... How will you drop a Schema in SQL? Dropping the tables is an easy thing to do if you want to reset your data. To issue a CREATE SCHEMA statement, you must have the privileges necessary to issue the included statements. The following statement creates a database and fully specifies each argument : The ALTER SCHEMA statement is used to rename a schema or to specify a new owner, the new owner must be a pre-existing user on the database. Users and schemas are completely separate. An answer on StackOverflow here has also provided a method for dropping all MySQL tables without the manual step of copying and pasting the Drop Table statements: You can save this script in an SQL file for you and your team to run in the future. DROP SCHEMA is a synonym for DROP DATABASE. BE CAREFUL - emphasis above mine. First, you need to query the INFORMATION_SCHEMA for the tables that have zero rows: SELECT table_schema,table_name FROM information_schema.tables WHERE table_rows = 0 AND table_schema NOT IN ('information_schema','mysql','performance_schema'); ]table_name_2, … [schema_name. on sql plus. The SQL DROP TABLE Statement. Conditionally drops the schema only if it already exists. But, to make this easier, we can add the command DROP TABLE IF EXISTS to the start of this output. Get my book: Beginning Oracle SQL for Oracle Database 18c. ]table_name_n; SQL Server DROP TABLE examples. DROP SCHEMA
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