How to use rowid in oracle

In Oracle database, ROWID is an internal identifier that uniquely identifies a row in a database table. Its usage is: 1. Use ROWID to locate rows; 2. Use ROWID to locate rows and update them; 3. Use ROWID to locate rows and delete them.

In Oracle database, ROWID is an internal identifier that uniquely identifies a row in a database table. It can be used to locate specific rows in a table and can be used in queries. Here are some common ways to use ROWID:

Using ROWID for row positioning:

SELECT * FROM your_table WHERE ROWID = 'AAABBB...';

In this query, 'AAABBB...' is the ROWID value of a specific row, which can be directly positioned by using ROWID to the line.

Use ROWID to locate and update rows:

UPDATE your_table SET column1 = value1 WHERE ROWID = 'AAABBB...';

This query will locate a specific row based on the ROWID value and update the data of that row.

Use ROWID to locate and delete rows:

DELETE FROM your_table WHERE ROWID = 'AAABBB...';

This query will locate a specific row based on the ROWID value and delete the row.

It should be noted that the ROWID value may change when rows are moved or the table is reorganized, so you need to be careful when using ROWID. In addition, ROWID is usually used internally, and for normal application development, direct use of ROWID may not be needed.

The above is the detailed content of How to use rowid in oracle. For more information, please follow other related articles on the PHP Chinese website!