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How to check oracle character set

Abigail Rose Jenkins

Apr 11, 2025 pm 09:42 PM

oracle

Oracle database character set query method: Query the value of the NLS_CHARACTERSET parameter in the V$NLS_PARAMETERS table.

How to check oracle character set

How to query the character set of Oracle database

How to query the character set of an Oracle database?

To query the character set of an Oracle database, you can use the following SQL statement:

 <code class="sql">SELECT VALUE FROM V$NLS_PARAMETERS WHERE PARAMETER = 'NLS_CHARACTERSET';</code>

Detailed description:

1. View the V$NLS_PARAMETERS table

V$NLS_PARAMETERS is a dynamic view that contains information about the National Locale (NLS) settings of the Oracle database.

2. PARAMETER column

The PARAMETERS column specifies the NLS parameter to query. To get the character set you need to specify 'NLS_CHARACTERSET'.

3. VALUE column

The VALUE column returns the value associated with the specified parameter. For character sets, it returns the character set name used by the database.

Example:

For example, the following query will display the character set of the current Oracle database:

 <code class="sql">SELECT VALUE FROM V$NLS_PARAMETERS WHERE PARAMETER = 'NLS_CHARACTERSET'; VALUE ---------------------------------------- AL32UTF8</code>

The result shows that the character set is AL32UTF8, a Unicode character set that supports all Unicode characters.

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