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This Oracle tutorial explains how to use the Oracle DELETE statement with syntax, examples, and practice exercises.

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Description

The Oracle DELETE statement is used to delete a single record or multiple records from a table in Oracle.

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Syntax

The syntax for the DELETE statement in Oracle/PLSQL is:

Parameters or Arguments

table

The table that you wish to delete records from.

WHERE conditions

Optional. The conditions that must be met for the records to be deleted. If no conditions are provided, then all records from the table will be deleted.

Note

• You do not need to list fields in the Oracle DELETE statement since you are deleting the entire row from the table.

Example - Using One condition

Let's look at a simple Oracle DELETE query example, where we just have one condition in the DELETE statement.

For example:

This Oracle DELETE example would delete all records from the customers table where the last_name is Smith.

You may wish to check for the number of rows that will be deleted. You can determine the number of rows that will be deleted by running the following Oracle SELECT statementbefore performing the delete.

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Example - Using Two conditions

Let's look at an Oracle DELETE example, where we just have two conditions in the DELETE statement.

For example:

This Oracle DELETE example would delete all records from the customers table where the last_name is 'Anderson' and the customer_id is greater than 25.

You may wish to check for the number of rows that will be deleted. You can determine the number of rows that will be deleted by running the following Oracle SELECT statementbefore performing the delete.

Example - Using EXISTS Clause

You can also perform more complicated deletes.

You may wish to delete records in one table based on values in another table. Since you can't list more than one table in the Oracle FROM clause when you are performing a delete, you can use the Oracle EXISTS clause.

For example:

Coolie dance riddim zip. This Oracle DELETE example would delete all records in the suppliers table where there is a record in the customers table whose customer_id is greater than 25, and the customer_id matches the supplier_id.

If you wish to determine the number of rows that will be deleted, you can run the following Oracle SELECT statement before performing the delete.

Frequently Asked Questions

Question: How would I write an Oracle DELETE statement to delete all records in TableA whose data in field1 & field2 DO NOT match the data in fieldx & fieldz of TableB?

Answer: You could try something like this for your Oracle DELETE statement:

Practice Exercise #1:

Based on the contacts table, delete all records from the contacts table who reside in the City of 'Las Vegas' and whose first_name is 'Jane'.

Solution for Practice Exercise #1:

The following Oracle DELETE statement would delete these records from the contacts table:

Practice Exercise #2:

Based on the contacts table, delete all records from the contacts table whose contact_id is greater than or equal to 5000 and less than 6000.

Solution for Practice Exercise #2:

Lego digital designer download 4.3 11. The following Oracle DELETE statement would delete these records from the contacts table:

Or you could write the solution using the BETWEEN clause as follows:

Before you delete

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Delete photos or videos

When you delete photos and videos, they go to your Recently Deleted album for 30 days. After 30 days, they'll be permanently deleted.

If you use iCloud Photos, and delete photos and videos from one device, the photos and videos will be deleted on your other devices.

If you add photos to your iPhone, iPad, or iPod touch by connecting your device to your computer, you can't delete them directly from your device in the Photos app. If you see the gray Trash button when you try to delete a photo from your iPhone, iPad, or iPod touch, you might need to stop syncing photos from your computer. Learn how to stop syncing photos from your computer.

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Delete a single photo

1. Open Photos.
2. Tap All Photos and select the photo or video that you want to delete.
3. Tap the Trash button , then tap Delete Photo.
   

Delete multiple photos

1. Open Photos and tap All Photos, then tap Select.
2. Tap multiple photos, or slide your finger across multiple photos to select more than one.
3. Tap the Trash button , then confirm to delete the items.
   

Recover deleted photos or videos

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If you accidentally delete a photo or video, you have 30 days to get it back from your Recently Deleted album. When you recover photos and videos, they go back to your All Photos album. Here's how to recover deleted photos or videos:

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1. Open Photos and tap the Albums tab.
2. Tap the Recently Deleted album, then tap Select.
3. Tap the photo or video that you want to keep or tap Recover All.
4. Tap Recover again to confirm.

If you're missing a photo or video, you can try these steps to find it.

Delete photos permanently

If you want to permanently delete your photos or videos, you can remove them from the Recently Deleted album. When you delete a photo from this album, you can't get it back. Here's how to delete photos permanently:

1. Open Photos and tap the Albums tab.
2. Tap the Recently Deleted album, then tap Select.
3. Tap the photos or videos that you want to delete or tap Delete All.
4. Tap Delete again to confirm.