谁能告诉我为什么这个where子句没有给我结果？

Question

I am trying to retrieve a value from a SQLite Database. My query works fine when I use the following:

String selectQuery = "SELECT * FROM savedlocation WHERE latitude="+lat;

But It doesn't work when I use the following query:

String selectQuery = "SELECT * FROM savedlocation WHERE latitude="+lat+"AND longitude="+lon; 

Can anyone tell me what is wrong with this query?

Answer 1

Missing space before AND :

String selectQuery = "SELECT * FROM savedlocation WHERE latitude="+lat+" AND longitude="+lon; 
//                                                                      ^ here