Can I delete from multiple tables MySQL?
From the manual: You can specify multiple tables in a DELETE statement to delete rows from one or more tables depending on the particular condition in the WHERE clause. However, you cannot use ORDER BY or LIMIT in a multiple-table DELETE.
Can you delete from two tables at once?
The syntax also supports deleting rows from multiple tables at once. To delete rows from both tables where there are matching id values, name them both after the DELETE keyword: DELETE t1, t2 FROM t1 INNER JOIN t2 ON t1.id = t2.id; What if you want to delete nonmatching rows?
How do I delete a record in two tables in SQL?
To remove one or more rows in a table:
- First, you specify the table name where you want to remove data in the DELETE FROM clause.
- 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.
How do you delete data from two tables using join?
SQL Syntax for delete JOIN
- DELETE [target table]
- FROM [table1]
- INNER JOIN [table2]
- ON [table1.[joining column] = [table2].[joining column]
- WHERE [condition]
How can I delete data from two tables in join in SQL Server?
DELETE JOIN is an advanced structured query language(SQL) statement that is used to perform delete operations in multiple tables while using SQL JOIN such that all rows are deleted from the first table and the matching rows in another table or based on the kind of join operation used in the query.
What is Cascade delete in MySQL?
ON DELETE CASCADE constraint is used in MySQL to delete the rows from the child table automatically, when the rows from the parent table are deleted. For example when a student registers in an online learning platform, then all the details of the student are recorded with their unique number/id.
How do I use cascade delete in SQL?
Edit table and columns specification by clicking … as shown in the below image.
- Select the parent table and the primary key column in the parent table.
- In the INSERT and UPDATE specifications, select Cascade for the delete rule.
- Click on Close and save the table in the designer.
Can we delete a row from a table based on another table?
Deleting rows based on another table. Sometimes we need to delete rows based on another table. This table might exist in the same database or not. We can use the table lookup method or SQL join to delete these rows.
Can we use delete with join?
It is totally possible to use JOIN and multiple tables in the DELETE statement.
How do I use Cascade on delete?
Use the ON DELETE CASCADE option to specify whether you want rows deleted in a child table when corresponding rows are deleted in the parent table. If you do not specify cascading deletes, the default behavior of the database server prevents you from deleting data in a table if other tables reference it.
What is delete delete and null Cascade?
ON DELETE CASCADE : SQL Server deletes the rows in the child table that is corresponding to the row deleted from the parent table. ON DELETE SET NULL : SQL Server sets the rows in the child table to NULL if the corresponding rows in the parent table are deleted.
How do I delete on Cascade in MySQL?