drop table sql

1. What does drop table do in SQL?
2. How do I drop a table in SQL query?
3. How do I drop a table from a database?
4. How do I drop and recreate a table in SQL?
5. Can we drop primary key from a table?
6. What is difference between drop and delete?
7. Can you join a table to itself in SQL?
8. How do I display a table in SQL?
9. Is table aliasing stored anywhere?
10. What is drop table if exists?
11. What is the drop table?
12. How delete all data from table in SQL?

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.

How do I drop a table in SQL query?

SQL DELETE Statement

1. DELETE FROM table_name WHERE condition;
2. Example. DELETE FROM Customers WHERE CustomerName='Alfreds Futterkiste';
3. DELETE FROM table_name;
4. Example. DELETE FROM Customers;

How do I drop a table from a database?

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.

How do I drop and recreate a table in SQL?

If You are using SQL Server Management Studio, You could generate a DROP and RECREATE script with "Keep schema and data" option.

1. Right click on the desired DB in object explorer.
2. Tasks > Generate scripts.
3. Select the table you want to script.
4. Then clicking on Advanced button.

Can we drop primary key from a table?

We can remove PRIMARY KEY constraint from a column of an existing table by using DROP keyword along with ALTER TABLE statement.

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.

Can you join a table to itself in SQL?

A SELF JOIN is another type of join in SQL which is used to join a table to itself, especially when the table has a FOREIGN KEY which references its own PRIMARY KEY. In this join, those rows are returned from the table which are satisfying the conditions.

How do I display a table in SQL?

SQL command to list all tables in Oracle

1. Show all tables owned by the current user: SELECT table_name FROM user_tables; Code language: SQL (Structured Query Language) (sql)
2. Show all tables in the current database: SELECT table_name FROM dba_tables; ...
3. Show all tables that are accessible by the current user:

Is table aliasing stored anywhere?

1 Answer. Aliases like any other items are stored in the Items table. You should check if you're looking for the Alias in the proper database.

What is drop table if exists?

The DROP TABLE statement deletes the specified table, and any data associated with it, from the database. The IF EXISTS clause allows the statement to succeed even if the specified tables does not exist. ... Attempting to drop the table before dropping the procedure will result in an error.

What is the drop table?

The DROP TABLE statement is used to drop an existing table in a database.

How delete all data from table in SQL?

To delete every row in a table:

1. Use the DELETE statement without specifying a WHERE clause. With segmented table spaces, deleting all rows of a table is very fast. ...
2. Use the TRUNCATE statement. The TRUNCATE statement can provide the following advantages over a DELETE statement: ...
3. Use the DROP TABLE statement.