ON subscribers.id = subscriptions.subscriber_id DELETE subscribers, subscriptionsįROM subscribers INNER JOIN subscriptions Your table should now be gone Depending on the style of table, you may have to hover over 'Delete' in order to view the 'Delete table' option. The union of all the table's extents holds the table. To handle such large tables, each table's data is divided into smaller 'chunks' called data shards or extents (the two terms are synonymous). Delete From Table1 a,Table2 b where a.idb.id Or DELETE FROM Table1 WHERE Table1.id IN (SELECT Table2.id FROM Table2) Or DELETE Table1 FROM Table1 t1 INNER JOIN Table2 t2 ON t1.ID t2.ID Share. A quick note on what an extent is: Azure Data Explorer is built to support tables with a huge number of records (rows) and large amounts of data. You can also hold Ctrl while clicking the table. To Delete table records based on another table. If the DELETE condition is satisfied for any of the joined combinations, the target row is deleted. Use two fingers to click on your document's table. If you have a many-to-many relationship (for instance, Magazines and Subscribers, joined by a Subscription) and you're removing a Subscriber, you need to remove any potential records from the join model as well. When deleting based on a JOIN (by specifying a USING clause), it is possible that a row in the target table joins against several rows in the USING table (s). You're not limited to just one table, though. So, the JOIN and WHERE do the selection and limiting, while the DELETE does the deleting. The key is that you specify the name of the table to be deleted from as the SELECT. ON DeletingFromTable.field_id = CriteriaTable.id How do you delete from one of those tables without removing the records in both table? DELETE DeletingFromTableįROM DeletingFromTable INNER JOIN CriteriaTable Oftentimes, one wants to delete some records from a table based on criteria in another table.

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