Can I delete from multiple tables MySQL?

Can I delete from multiple tables MySQL?

Multi-Table Deletes. You can specify multiple tables in a DELETE statement to delete rows from one or more tables depending on the condition in the WHERE clause. You cannot use ORDER BY or LIMIT in a multiple-table DELETE . The table_references clause lists the tables involved in the join, as described in Section 13.2.

How do you delete data from two tables using join?

SQL Syntax for delete JOIN

1. DELETE [target table]
2. FROM [table1]
3. INNER JOIN [table2]
4. ON [table1.[joining column] = [table2].[joining column]
5. 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.

How do you remove duplicates from two tables in SQL?

HAVING COUNT(*) > 1;

1. In the output above, we have two duplicate records with ID 1 and 3.
2. To remove this data, replace the first Select with the SQL delete statement as per the following query.
3. SQL delete duplicate Rows using Common Table Expressions (CTE)
4. We can remove the duplicate rows using the following CTE.

How do I use cascade delete in SQL?

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.

Can we use join with delete?

It is totally possible to use JOIN and multiple tables in the DELETE statement.

How do you delete duplicate rows in SQL based on two columns?

The best way to delete duplicate rows by multiple columns is the simplest one: Add an UNIQUE index: ALTER IGNORE TABLE your_table ADD UNIQUE (field1,field2,field3); The IGNORE above makes sure that only the first found row is kept, the rest discarded.

How can I delete duplicate records in MySQL?

MySQL can remove duplicates record mainly in three ways.

1. Delete Duplicate Record Using Delete Join. We can use the DELETE JOIN statement in MySQL that allows us to remove duplicate records quickly.
2. Delete Duplicate Record Using the ROW_NUMBER() Function.
3. DELETE Duplicate Rows Using Intermediate Table.

How can I DELETE data from two tables in join in SQL Server?

How do you use join IN DELETE query in mysql?

Similarly, we can also use the LEFT JOIN clause with the DELETE keyword for deleting rows from the left(first) table that does not have matching rows from a right(second) table….DELETE JOIN with LEFT JOIN

1. DELETE Table1 FROM Table1.
2. LEFT JOIN Table2 ON Table1. key = Table2. key.
3. WHERE Table2. key IS NULL;