What Is Drop Table In MySQL?

How do I drop a table in SQL Server?

Using SQL Server Management StudioIn Object Explorer, select the table you want to delete.Right-click the table and choose Delete from the shortcut menu.A message box prompts you to confirm the deletion.

Click Yes.

Deleting a table automatically removes any relationships to it..

How do you find out who dropped a table in SQL Server?

Now the challenge is how to find out who dropped the table which was created in the database. There is a simpler way to do the same. First right click on the database – Go to Reports >> Standard Reports >> Schema Changes History.

How do you check who dropped the database in SQL Server?

Right click SQL Server Instance and Select Reports -> Standard Reports -> Schema Changes History as shown in the below snippet. 3. This will open up Scheme Changes History report which will have the details about who deleted the SQL Server Database along with the timestamp when the database was deleted.

What is difference between drop and delete?

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. … DELETE is DML. DROP is DDL.

How do you drop a table in database?

Syntax: DROP object object_name Examples: DROP TABLE table_name; table_name: Name of the table to be deleted. DROP DATABASE database_name; database_name: Name of the database to be deleted.

What is a MySQL table?

Each database table has a name which consists of two parts: a table prefix and the specific database name itself. In order to provide proper content for a given website, MySQL stores all the data in tables. … Regardless of the prefix, each MySQL database table consists of rows and columns.

Why drop table if exists?

The DROP TABLE SQL statement enables you to delete a table from the database. If the table did not exist then attempting to DROP it would cause an error to occur. The DROP TABLE IF EXISTS SQL statement enables a check to see that the table exists prior to attempting the dropping (deletion) of the table.

How do you check if a table exists in SQL?

To check if a table exists in SQL Server, you can use the INFORMATION_SCHEMA. TABLES table. You can use this table with an IF THEN clause do determine how your query responds whether or not a table exists.

Are indexes dropped when a table is dropped?

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.

How many tables may be included with a join?

How many tables may be included with a join? Explanation: Join can be used for more than one table.

Which one sorts rows in SQL?

The SQL ORDER BY Keyword The ORDER BY keyword is used to sort the result-set in ascending or descending order. The ORDER BY keyword sorts the records in ascending order by default. To sort the records in descending order, use the DESC keyword.

What is Auto_increment in MySQL?

Auto Increment is a function that operates on numeric data types. It automatically generates sequential numeric values every time that a record is inserted into a table for a field defined as auto increment.

Can you join a table to itself?

A self join allows you to join a table to itself. It is useful for querying hierarchical data or comparing rows within the same table. A self join uses the inner join or left join clause. … Note that referencing the same table more than one in a query without using table aliases will result in an error.

What do you need to consider when you make a table in SQL?

1) Make sure the column datatypes are the smallest necessary to comfortably fit the data. 2) Make sure you use date columns for dates, integer type columns for whole numbers that might have math done to them, VARCHAR when data width will vary, and NVARCHAR if you need to store more than one language.

What is the drop table statement?

The SQL DROP TABLE statement is used to remove a table definition and all the data, indexes, triggers, constraints and permission specifications for that table.

How can I see the structure of a table in MySQL?

To show the schema, we can use the DESC command. This gives the description about the table structure.

How can I tell which user dropped a table in MySQL?

Finding out who dropped a table using the transaction logUSE [master]; GO. CREATE DATABASE [FnDbLogTest]; GO. USE [FnDbLogTest]; GO.CREATE TABLE [TestTable] ( [c1] INT IDENTITY, [c2] CHAR (100) DEFAULT ‘a’); GO. CREATE CLUSTERED INDEX [TT_CL] ON [TestTable] ([c1]); GO. INSERT INTO [TestTable] DEFAULT VALUES; GO.SELECT OBJECT_ID (N’TestTable’); GO.DROP TABLE [TestTable]; GO.

What does drop table do in SQL?

The drop table command is used to delete a table and all rows in the table. To delete an entire table including all of its rows, issue the drop table command followed by the tablename. drop table is different from deleting all of the records in the table.

Does drop table delete table structure?

The DROP TABLE is another DDL (Data Definition Language) operation. But it is not used for simply removing data from a table; it deletes the table structure from the database, along with any data stored in the table. This removes all data in the table product and the structure of the table. …

How do I check MySQL version?

It is essential to know which version of MySQL you have installed. … The easiest way to find the MySQL version is with the command: mysql -V. … The MySQL command-line client is a simple SQL shell with input editing capabilities.More items…•

Can we drop primary key from a table?

The syntax to drop a primary key in SQL is: ALTER TABLE table_name DROP PRIMARY KEY; table_name. The name of the table to modify.