如何将双精度值与数据库中的小数进行比较，如果相似，则返回true

Question

Example:

Database latitude value: 33.3360705

location from android device latitude value: 33.33607

These are technically NOT the same, BUT the difference is so little that I would like to consider them the same.

How would I do that? :)

Thanks.

Answer 1

Just use ROUND in MySQL when getting the value from the database. The following will round to 5 decimal places (which matches your android device value):

SELECT ROUND(myValue, 5) 
FROM myTable