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POSQL Server : RowVersion equivalent in Oracle
 

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    <p>Does Oracle has similar datatype to <a href="http://technet.microsoft.com/en-us/library/ms182776.aspx">SQL Server's <code>RowVersion</code></a>?</p> <p>When you insert or update a row, the corresponding Version column(which is of type <code>RowVersion</code>) gets updated automatically.</p> <p><em><a href="http://technet.microsoft.com/en-us/library/ms182776.aspx">MSDN says about RowVersion</a></em>:</p> <blockquote> <ul> <li><p>Is a data type that exposes automatically generated, unique binary numbers within a database. rowversion is generally used as a mechanism for version-stamping table rows. The storage size is 8 bytes. The rowversion data type is just an incrementing number and does not preserve a date or a time.</p></li> <li><p>Each database has a counter that is incremented for each insert or update operation that is performed on a table that contains a rowversion column within the database. This counter is the database rowversion. This tracks a relative time within a database, not an actual time that can be associated with a clock. A table can have only one rowversion column. Every time that a row with a rowversion column is modified or inserted, the incremented database rowversion value is inserted in the rowversion column.</p></li> <li><p>You can use the rowversion column of a row to easily determine whether any value in the row has changed since the last time it was read. If any change is made to the row, the rowversion value is updated. If no change is made to the row, the rowversion value is the same as when it was previously read. </p></li> <li><p>You can add a rowversion column to a table to help maintain the integrity of the database when multiple users are updating rows at the same time. You may also want to know how many rows and which rows were updated without re-querying the table.</p></li> </ul> </blockquote> <p>We are designing a data model with oracle and would like to use Version column to manage concurrency.</p> <p>I would also like to know if there is better way in Oracle world.</p>
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