MySQL Delete Row or Rows

How to Delete a row in MySQL

1. DELETE FROM `table_name` tells MySQL server to remove rows from the table ..
2. [WHERE condition] is optional and is used to put a filter that restricts the number of rows affected by the MySQL DELETE row query.

1. How do I delete a row in SQL?
2. Which command is used to erase all the rows from a MySQL table?
3. How do I delete a row in MySQL workbench?
4. How do you delete multiple rows in SQL?
5. How do I remove a null row in SQL query?
6. How do I delete a row in MySQL?
7. Does delete use index?
8. What MySQL delete return?
9. How do I clear the screen in MySQL?
10. How do I delete a parent row in MySQL?
11. How do I delete on Cascade in MySQL?
12. How do you delete a database in MySQL?

How do I delete a row in SQL?

To remove one or more rows in a table:

1. First, you specify the table name where you want to remove data in the DELETE FROM clause.
2. Second, you put a condition in the WHERE clause to specify which rows to remove. If you omit the WHERE clause, the statement will remove all rows in the table.

Which command is used to erase all the rows from a MySQL table?

MySQL TRUNCATE TABLE statement is used to delete all the rows from a table.

How do I delete a row in MySQL workbench?

SQL DELETE Statement

The DELETE statement is used to delete rows in a table. You specify which table to delete the records from, and if required, you add a WHERE clause to specify which records to delete. Notice that if you omit the WHERE clause, all records will be deleted!

How do you delete multiple rows in SQL?

We can use DELETE statement along with a WHERE clause, which identifies those multiple rows, to delete multiple rows from MySQL table.

How do I remove a null row in SQL query?

Use the delete command to delete blank rows in MySQL. delete from yourTableName where yourColumnName=' ' OR yourColumnName IS NULL; The above syntax will delete blank rows as well as NULL row.

How do I delete a row in MySQL?

How to Delete a row in MySQL

1. DELETE FROM `table_name` tells MySQL server to remove rows from the table ..
2. [WHERE condition] is optional and is used to put a filter that restricts the number of rows affected by the MySQL DELETE row query.

Does delete use index?

Unlike the insert statement, the delete statement has a where clause that can use all the methods described in Chapter 2, “The Where Clause”, to benefit directly from indexes. In fact, the delete statement works like a select that is followed by an extra step to delete the identified rows.

What MySQL delete return?

Single-Table Syntax. The DELETE statement deletes rows from tbl_name and returns the number of deleted rows.

How do I clear the screen in MySQL?

mysql> !\ clear mysql> !\ cls mysql> system cls mysql> system clear ..

How do I delete a parent row in MySQL?

You have 2 options:

1. Delete the associated records from the appointments table first with a separate delete statement.
2. Add on delete cascade option to appointments_user_id_foreign foreign key.

How do I delete on Cascade 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 do you delete a database in MySQL?

First list all databases on your server. Use the command 'SHOW DATABASES;' in the mysql-console like in the example above. Now copy the name of the database you want to delete. To do delete a database you need the command 'DROP DATABASE'.