-dbi.org/reference/dbIsValid.html" class="external-link">dbIsValid</a>()</code>,
<code><a href="https://dbi.r-dbi.org/reference/dbListFields.html" class="external-link">dbListFields</a>()</code>,
<code><a href="https://dbi.r-dbi.org/reference/dbListObjects.html" class="external-link">dbListObjects</a>()</code>,
<code><a href="https://dbi.r-dbi.org/reference/dbListResults.html" class="external-link">dbListResults</a>()</code>,
<code><a href="https://dbi.r-dbi.org/reference/dbListTables.html" class="external-