将各种数据类型的值写入文本文件以进行查询

What would be an ideal constructs / design for a program intended for querying lines of strings from a text file as a database? My main problem here is how do I make an object holding values of different data types (UUID, string, string, double, double, int) be written as a single package onto a text file of which these data will also be queried. I'm thinking of an array-like container for these values so that when queried, the output would print out the data in that package. What would be an ideal constructs / design for