我的工作在Android项目。我使用SQLite数据库吧。我在数据库中的表。我创建databasehelper类。我要计算在特定的表中的记录数。我怎样才能做到这一点？任何帮助将AP preciated？

I am working on android project. I used sqlite database for it. I have tables in database. I have created databasehelper class. i want to count number of records in particular table. how can i achieve this ? any help will be appreciated?

推荐答案

这将是更有效的：

int numRows = DatabaseUtils.longForQuery(db, "SELECT COUNT(*) FROM table_name", null);

或者

int numRows = DatabaseUtils.queryNumEntries(db, "table_name");