In this article, I describe how to drop all the tables in a particular database. IF EXISTS Applies to: SQL Server ( SQL Server 2016 (13.x) through current version). As you can see there are only temp tables which belong to your current session. How to check if a table exist in Sql Server. For this example we are going to use the following code for generating some temp tables and use WideWorldImporters database, you can use any database as we are not using data directly. This article provides a Transact- SQL script to drop foreign keys that can be helpful when you do not need to drop the child tables. There is no DROP ALL TABLES command. Summary: in this tutorial, you will learn how to use the SQL Server DROP TABLE statement to remove one or more tables from a database. Your email address will not be published. If we want to delete temp tables that belongs to our current user we should execute the following dynamic SQL, This is the query that is going to be generated by the dynamic Sql, After executing this query you are going to see the following Message. Sometimes, you want to remove a table that is no longer in use. In this article, you’ll learn the syntax of each command in different database engines like MySQL, PostgreSQL, SQL Server, and Oracle. Required fields are marked *, Copyright © All rights reserved.| Proudly Powered by WordPress and Echoes, How to delete large number of rows in Sql Server. In this article, I described how to drop all tables in SQL Server. You can run the following PS on [ServerA]: How to delete/drop all the tables from SQL Server Database without using Enterprise Manager? Your feedback and constructive contributions are welcome. Now to DROP all of these three tables, you do not need to use three DROP statements, All you need to do is simply use single DROP statement and specify the three table names separated by comma as shown below That’s it database_nameIs the name of the database in which the table was created.Windows Azure SQL Database supports the three-part name format database_name. All contents are copyright of their authors. Clean Architecture End To End In .NET 5, How To Add A Document Viewer In Angular 10, Getting Started With Azure Service Bus Queues And ASP.NET Core - Part 1, Flutter Vs React Native - Best Choice To Build Mobile App In 2021, Deploying ASP.NET and DotVVM web applications on Azure, Use Entity Framework Core 5.0 In .NET Core 3.1 With MySQL Database By Code-First Migration On Visual Studio 2019 For RESTful API Application, Getting Started With Azure Service Bus Queues And ASP.NET Core Background Services. What I have done is to create a copy of the DB and plan on removing all columns that are not PK or FK from each table. So this cannot be done with one SQL statement. Windows Azure SQL Database does not support four-part names.IF EXISTSApplies to: SQL Server ( SQL Server 2016 (13.x) through current version).Conditionally drops the table only if it already exists.s… Deleting temp tables is a simple job, but when we create tons of them and we would like to delete all without disconnecting our session from Sql Server, that can be a little tricky. Drop Views, Function, Stored Procedures and Tables, drop functions and views first, procs last Drop XML Schema Collections Drop the Schema Of course if you have a view in another database or schema referencing your objects I want to drop all default constraints, check constraints, unique constraints, primary keys and foreign keys from all tables in a SQL Server database. Here I will explain how to drop/delete all tables, stored procedure and triggers from SQL server by single SQL query Introduction: In this article, I have explained how to drop all tables, stored procedures, views and triggers from the database. Please share if you know more about this. I tried using DROP Tables, Truncate Database, Delete and many more but it is not working. You have to either drop the child tables before removing the parent table, or remove foreign key constraints. In SSMS: Right click the database Go to "Tasks" Click "Generate Scripts" In the "Choose Objects" section, select "Script entire database and all database objects" In the "Set SELECT 'DROP TABLE "' || TABLE_NAME || '";' FROM USER_TABLES WHERE TABLE_NAME LIKE 'YOURTABLEPREFIX%' Or if you want to remove the constraints and free up … [schema_name].object_name when the database_name is the current database or the database_name is tempdb and the object_name starts with #. Your email address will not be published. DROP TABLE 文を使って作成済みのテーブルを削除する方法について解説します。テーブルを削除すると、テーブルそのものとテーブルに格納されていたデータ、テーブルに対するトリガが削除されます。 Examples: Updating statestics for each table in the database Logging the space used by each table in the database finding the number of rows for each table in database Conditionally drops the schema only if it already exists. Which I am not thrilled with doing since it could range from 150 tables to 950 tables. through SQL Query. Deleting temp tables is a simple job, but when we create tons of them and we would like to delete all without disconnecting our session from Sql Server, that can be a little tricky. That is going to give us a list of all the temp tables that we have on the database, As you can see temp tables are followed by _____________ characters and by a string that identifies the session. sp_MSforeachtable is an undocumented stored procedure that is not listed in MSDN Books Online. I hope this article has helped you to understand this topic. ©2020 C# Corner. SET @tables = CONCAT ('DROP TABLE IF EXISTS ', @tables); This line adds “DROP TABLE IF EXISTS” before your … As you can see temp tables that belonged to your session were deleted. This line ensures that tables variable is never NULL. And you’ll understand the DROP TABLE vs. DELETE vs. TRUNCATE TABLE debate. In case you would like to obtain the list of temp tables for the current user/scope you can use the following query. This is going to create 4 temp tables that belongs to the current user and create tables from 4 to 7 with another user. /* TRUNCATE ALL TABLES IN A DATABASE */ DECLARE @dropAndCreateConstraintsTable TABLE ( DropStmt VARCHAR(MAX) ,CreateStmt VARCHAR(MAX) ) /* Gather information to drop and then recreate When the above script is run against any database, all the tables are emptied and reset. you can check the list of temp tables by executing the following query. schema_name Is the name by which the schema is known within the database. Drop all tables, stored procedure, views and triggers Swap the values of two columns in SQL Server Clear List of Recent SQL Server Connection From SQL Server Management Studio Difference between inner join and equi join and SQL Server DROP FUNCTION – a simple example The following example creates a function that calculates discount amount from quantity, list price, and discount percentage: CREATE FUNCTION sales.udf_get_discount_amount ( @quantity INT , @list_price DEC ( 10 , 2 ), @discount DEC ( 4 , 2 ) ) RETURNS DEC ( 10 , 2 ) AS BEGIN RETURN @quantity * @list_price * @discount END In SQL Server, you cannot drop a table if it is referenced by a FOREIGN KEY constraint. Use: sp_MSforeachtable can be used to run a query against each table in the database. For this example we are going to use the following code for generating some temp tables and use WideWorldImporters database, you can use any database as we are not using data directly. The easiest way to do this is to generate your DROP TABLE commands on the fly, similar to the following: SPOOL drop I want to delete all tables using Query Analyzer, i.e. I want to drop the all foreign keys that have the following conditions. Say you want to delete all triggers in [AdventureWorks] database on [ServerB] SQL Server instance (SQL Server 2005+). Tables which belong to your current session in MSDN Books Online either drop the child tables removing... See temp tables that belonged to your current session [ AdventureWorks ] database on [ ServerA ]: There no. Or the database_name is tempdb and the object_name starts with # say you want to remove table. You can see There are only temp tables for the current database the... And create tables from 4 to 7 with another user table was created.Windows SQL... In a particular database, you can use the following PS on [ ServerB ] SQL Server without. Adventureworks ] database on [ ServerB ] SQL Server 2005+ ) on [ ServerB ] SQL 2005+. 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