Difference between revisions of "Selecting Database Name"
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To select the [[Oracle Database]] name, the most common method is: | To select the [[Oracle Database]] name, the most common method is: | ||
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<pre> | <pre> | ||
SELECT name FROM v$database | SELECT name FROM v$database | ||
</pre> | </pre> | ||
| − | This, however, requires special permissions to be able to read the pseudo table v$ | + | This, however, requires special permissions to be able to read the pseudo table v$database. |
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The database name is part of the session context and can be selected using the following function: | The database name is part of the session context and can be selected using the following function: | ||
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<pre> | <pre> | ||
SELECT sys_context('USERENV', 'DB_NAME') FROM dual | SELECT sys_context('USERENV', 'DB_NAME') FROM dual | ||
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[[PeopleSoft Query]] | [[PeopleSoft Query]] | ||
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| + | |[[File:Transform-PeopleSoft-Query.JPG|108px|link=http://bit.ly/PS_XSLT_BOOK]] | ||
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| + | [http://bit.ly/PS_XSLT_BOOK Transforming PeopleSoft Query] | ||
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Latest revision as of 22:48, 18 December 2016
To select the Oracle Database name, the most common method is:
SELECT name FROM v$database
This, however, requires special permissions to be able to read the pseudo table v$database.
The database name is part of the session context and can be selected using the following function:
SELECT sys_context('USERENV', 'DB_NAME') FROM dual
When used as part of a larger query, this does not need to join the v$database pseudo table.
This is particularly useful in packaged solutions like PeopleSoft, SAP etc. where permissions to see v$database are non-standard.
For more hints and tips like this, see the eBook:
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Using Functions in PeopleSoft Query
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