How do I delete a table in MySQL?

How do I delete a table in MySQL?

Go to the Sql tab run one of the below query: delete from tableName; Delete: will delete all rows from your table. Next insert will take next auto increment id.

How do I delete a parent table in MySQL?

ON DELETE CASCADE clause in MySQL is used to automatically remove the matching records from the child table when we delete the rows from the parent table. It is a kind of referential action related to the foreign key.

How does delete work in MySQL?

Explanation:

1. The DELETE statement deletes rows from table_name and returns the number of deleted rows. ...
2. The conditions in the WHERE clause (optional) identify which rows to delete.
3. Without WHERE clause, all rows are deleted.
4. If you specify the ORDER BY clause, the rows are deleted in specified order.

How do you delete data from a database table?

Deleting data from tables

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.

What's difference between truncate and delete?

The DELETE statement removes rows one at a time and records an entry in the transaction log for each deleted row. TRUNCATE TABLE removes the data by deallocating the data pages used to store the table data and records only the page deallocations in the transaction log.

Which command in SQL is used to delete a table entire data and structure?

SQL DROP Table command 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.

Which of the following is used to delete an entire MySQL database?

Explanation: The 'TRUNCATE' keyword in MySQL is used to delete all the rows from the table and also free the space containing the table.

What is delete query in MySQL?

What is the DELETE Query? MySQL Delete command is used to delete rows that are no longer required from the database tables. It deletes the whole row from the table and returns count of deleted rows. ... The Delete query in MySQL can delete more than one row from a table in a single query.

Which is better truncate or delete?

Truncate removes all records and doesn't fire triggers. Truncate is faster compared to delete as it makes less use of the transaction log. Truncate is not possible when a table is referenced by a Foreign Key or tables are used in replication or with indexed views.

How to drop a table in MySQL?

• Method 1: MySQL Drop All Tables with SQL Generate a List of Drop Table Statements For All Tables. Replace the word "database_name" with the name of your database. ... Copy and Paste The Results Into a New Window. Now we have a list of tables with the Drop Table command. ... Disable and Enable Foreign Key Checks. ... Run The Script. ...

How I can delete data from table?

• SQL Server Fast Delete from Large Table Demo Create a Test Table. For this step we will create a test table: dbo.Test1. ... Load Test Data. For this limited example we will only load 5000 rows and create 2 indexes. ... Create a Duplicate Table. Create a duplicate with new names for the table and indexes. ... The SWITCH! ... Move Back! ... Eliminate the Original Data! ...

What is drop table in MySQL?

• DROP TABLE. In MySQL, DROP TABLE command removes one or more tables from an existing database. The user who is using the DROP command, must have DROP privilege for each table(s) he wants to drop. The command removes all the data and table definition from the database. Syntax:

How do I remove a MySQL database?

• you'll need to use the MySQL command line from your computer's Command Prompt (Windows) or Terminal ...
• then press ↵ Enter . ...
• Enter your password when prompted. ...
• View a list of your databases.