.. toctree:: :maxdepth: 1 :glob: sql_data_type.md sql_ddl_command.md sql_dml_command.md sql_query_operator.md sql_numeric_function.md sql_string_function.md sql_date_function.md sql_aggregate_function.md sql_join_function.md sql_vector_function.md sql_code_and_state.md mysql_protocol.md