Question

我尝试使用内连接和联合不工作

sql="SELECT * FROM " +
        "(SELECT order_id, order_date, order_status, order_value, order_sapId, order_from, order_clientAcct, order_error, order_visitId, order_cancelled, distributor_name " +
        " FROM `orders` " +
        " JOIN visits  on  visit_id = order_visitId  " +
        " JOIN Name ON user_id = visit_userId  " +
        " JOIN distributor ON distributor_id = visit_outlet_id  " +
        " WHERE order_from = 'CSFA' AND user_id = '"+ App.getUserData("user_id")+"' " +
        ")" +
        " JOIN " +
        "(SELECT   order_id, order_date, order_status, order_value, order_sapId, order_from, order_clientAcct, order_error, order_visitId, order_cancelled,  distributor_name " +
        " FROM `orders` " +
        " JOIN distributor ON order_clientAcct = distributor_accountName " +
        " JOIN user ON salesEmpNo = user_sapId " +
        " WHERE order_from = 'u' AND user_id = '"+ App.getUserData("user_id")+"' " +
        ") " +
        "" +
        "ORDER BY order_id DESC LIMIT 100" +
        "";

我需要一种方法来加入这两个结果 1.尝试内连接 2.tried union

E / SQLiteLog：（1）near＆＃34;（＆＃34;：语法错误 11-24 19：53：01.017 13531-13531 / E / AndroidRuntime：致命异常：主要过程：，PID：13531 android.database.sqlite.SQLiteException：near＆＃34;（＆＃34 ;:语法错误（代码1）:,同时编译：SELECT * FROM（SELECT order_id，order_date，order_status，order_value，order_sapId，order_from，order_clientAcct，order_error ，order_visitId，order_cancelled，distributor_name FROM orders JOIN访问visit_id = order_visitId JOIN名称ON user_id = visit_userId JOIN分配器ON distributor_id = visit_outlet_id WHERE order_from =＆＃39; CSFA＆＃39; AND user_id =＆＃39; 75＆＃ 39;）UNION（SELECT order_id，order_date，order_status，order_value，order_sapId，order_from，order_clientAcct，order_error，order_visitId，order_cancelled，distributor_name FROM orders JOIN distributor ON order_clientAcct = distributor_accountName JOIN user ON salesEmpNo = user_sapId WHERE order_from =＆＃ 39; u＆＃39; AND user_id =＆＃39; 75＆＃39;）ORDER BY order_id DESC LIMIT 100

这是错误日志

Answer 1

经过几天的研究后，我们终于得到了答案。使用LEFT JOIN和OR来从表中获取数据，只有它们匹配。


sql="" +
        "SELECT DISTINCT order_id, order_date, order_status, order_value, order_sapId, order_from, order_clientAcct, order_error, order_visitId, order_cancelled, distributor_name " +
        " FROM `orders` " +
        " LEFT JOIN visits,user,distributor  ON  (visit_id = order_visitId AND user_id = visit_userId AND  distributor_id = visit_outlet_id AND order_from = 'CSFA' AND user_id = '"+ App.getUserData("user_id")+"') OR " +
        " " +
        " ( order_clientAcct = distributor_accountName AND salesEmpNo = user_sapId AND order_from = 'SAP' AND user_id = '"+ App.getUserData("user_id")+"' )" +
        " " +
        "ORDER BY order_id DESC LIMIT 100" +
        "";

联盟没有工作空结果

1 个答案: