# Obtain CDR from DB Every minute, Class4 pushes CDRs into DB. You can obtain all CDRs in the following tables: ``` public | client_cdr20200412 | table | class4_dial | 252 MB | public | client_cdr20200413 | table | class4_dial | 293 MB | public | client_cdr20200414 | table | class4_dial | 216 MB | public | client_cdr20200415 | table | class4_dial | 318 MB | public | client_cdr20200416 | table | class4_dial | 353 MB | ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cookbook.denovolab.com/data-access/postgres-database/obtain-cdr-from-db.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.