Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_23 ( byte_string VARCHAR, max_memory__kwords_ VARCHAR, floating_point VARCHAR, memory_map VARCHAR, decimal VARCHAR )

### Question ###
What is the value for the byte string when the memory map, decimal, and floating points are all standard and the max memory is smaller than 512?

### Accurate SQL ###

SELECT byte_string FROM table_name_23 WHERE memory_map = "standard" AND decimal = "standard" AND floating_point = "standard" AND max_memory__kwords_ < 512