## select ##### *Description* Switches to a given database. 选择数据库 ##### *Parameters* *INTEGER*: dbindex, the database number to switch to. 整数值：数据库索引，数据库的ID ##### *Return value* `<span class="calibre12">TRUE</span>` in case of success, `<span class="calibre12">FALSE</span>` in case of failure. ##### *Example* (See following function)