# Readonly command

The `Readonly` command sets the current connection to a "read-only" connection, as if the current user were defined as a `readOnlyAccess` user.

For more information about database authorization, see "Configuring user authorization" in the Derby Security Guide.

## Syntax

    READONLY { ON | OFF }

## Example

    ij> connect 'jdbc:derby:menuDB';
    ij> readonly on;
    ij> SELECT * FROM menu;
    COURSE    |ITEM                |PRICE
    -----------------------------------------------
    entree    |lamb chop           |14
    dessert   |creme brulee        |6
    appetizer |baby greens         |7
    entree    |lamb chop           |14
    entree    |lamb chop           |14
    dessert   |creme brulee        |6
    6 rows selected
    ij> UPDATE menu set price = 3;
    ERROR 25502: An SQL data change is not permitted for a read-only
    connection, user or database.

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