Delete from one table with join

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余生分开走
余生分开走 2020-12-01 09:16

I\'m trying to delete records from one database based on a selection criteria of another. We have two tables, emailNotification which stores a list of jobs and emails. Then

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  •  误落风尘
    2020-12-01 09:39

    MySQL DELETE records with JOIN

    Delete multiple records from multiple table using Single Query is As below:

    You generally use INNER JOIN in the SELECT statement to select records from a table that have corresponding records in other tables. We can also use the INNER JOIN clause with the DELETE statement to delete records from a table and also the corresponding records in other tables e.g., to delete records from both T1 and T2 tables that meet a particular condition, you use the following statement:

    DELETE T1, T2
    FROM T1
    INNER JOIN T2 ON T1.key = T2.key
    WHERE condition
    

    Notice that you put table names T1 and T2 between DELETE and FROM. If you omit the T1 table, the DELETE statement only deletes records in the T2 table, and if you omit the T2 table, only records in the T1 table are deleted.

    The join condition T1.key = T2.key specifies the corresponding records in the T2 table that need be deleted.

    The condition in the WHERE clause specifies which records in the T1 and T2 that need to be deleted.

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