automated terminal push

landing/docs/Introduction-To-Databases/010-delete.md

@@ -0,0 +1,41 @@
+# DELETE
+
+As the name suggests, the `DELETE` statement would remove data from your database.
+
+The syntax is as follows:
+
+```sql
+DELETE FROM users WHERE id=5;
+```
+
+The output should indicate that 1 row was affected:
+
+```
+Query OK, 1 row affected (0.01 sec)
+```
+
+> Important: Just like the `UPDATE` statement, if you don't specify a `WHERE` clause, all of the entries from the table will be affected, meaning that all of your users will be deleted. So, it is critical to always add a `WHERE` clause when executing a `DELETE` statement.
+
+```sql
+DELETE FROM users;
+```
+
+The output should indicate (where x is the number of tuples in the table):
+```
+Query OK, x row(s) affected (0.047 sec)
+```
+
+Similar to the Linux `rm` command, when you use the `DELETE` statement, the data would be gone permanently, and the only way to recover your data would be by restoring a backup.
+
+## Delete from another table
+
+As we saw in the two precedents sections you can `INSERT` or `UPDPATE` tables rows based on other table data. You can do the same for the `DELETE`.
+
+For example, if you want to delete the records from the `users` table if the corresponding prospect has been disabled, you could do it this way:
+
+```sql
+delete users
+from users, prospect_users
+where users.username = prospect_users.username
+and NOT prospect_users.active
+```