sqlite-從列值為空的表中獲取數據

從列值為空的表中獲取數據

表：

CREATE TABLE Reports (
         _id INTEGER NOT NULL PRIMARY KEY,member_id INTEGER, 
      is_conf BOOLEAN,
         name TEXT, 
      started INTEGER,

     finished INTEGER,
    description TEXT, 
       obj_id INTEGER NOT NULL, 
     FOREIGN KEY (obj_id) REFERENCES Objects (_id));

我要獲取member_id = NULL這裡的數據。

但是查詢寫的好像不對

String sql = "SELECT _id, name FROM Reports WHERE member_id = NULL";
Cursor cursor = db.rawQuery(sql, null);

最佳回答：

用這個就能解決：

String sql = "SELECT _id, name FROM Reports WHERE member_id IS NULL";